Cr500 jetting. I went back to stock jetting on the .

Cr500 jetting That pilot jet should work, but the needle is a bit too too rich and the main is way too lean. Mar 6, 2012 · A box of parts will not solve any jetting problems. stock pipe. 00 May 14, 2013 · 86 cr500 jetting help Jump to Latest 3K views 5 replies 4 participants last post by jgratton Aug 15, 2013 Oct 18, 2010 · Whether it will foul a plug or not has nothing to do with the model of bike, its running condition and jetting is what matters. Share More sharing options Followers 1. Jul 2, 2014 · 1987 Husky WR400, 1985 Husky CR500 Other Motorcycles: KTM 200, 300, 380, 525. My OEM carb starts easy, but has a "4 cycle spot” from 1/8-1/4 throttle and then a big hit when it goes into 2 cycle above 1/4 throttle. 42 pilot. 5 out Main Jet 178 1999 Pilot Jet 42 Needle STOCK Clip Position 2ND Air Screw 1. 5 year Silver mod) & 1983 White CR500`s for 4 years back in those days. do you know a basic setting for my carb. Nov 24, 2006 · CR500 Street Tard blacked out with Baja Designs race light kit & full port & polished motor jetting, and headpipe lengths. The bike is a 96 with mild porting, VF2 reed cage and FMF pipe. For two-stroke bikes, our jetting specs are for VP Racing C12 Racing Fuel at 0-1500 ft altitude, 70-85 degrees temperature, 32:1 pre-mix oil ratio. Last weekend it did okay, nowhere near s Oct 20, 2009 · I am swapping the old PJ from my 1996 CR500 for a slightly more modern PWK 38mm quadvent airstriker and would just like a little advice on the jetting please:worthy: The PWK at the moment is set up with, 165RD main. It sounds like your needle valve. run 2 was 182 main, 1991 CR 500 power in Gen III (just finished), new crank, piston, main bearings, seals, stock porting & head (polished though), V Force, PC Platinum, PC 304 silencer. Dont jet that big mutha' too lean or you will gurnade it. it does seem that it has a bit of bog when PWK AIRSTRYKER 38mm CARB w/Jet Kit (Long Body) JDKH08 $ 799. I was looking for a starting point for jetting. 5 turns out ( *Please Subscribe - looking for 1000 subscribers!* Jetting with 38MM PWK air Stryker Another jetting thread Post by wastedyouth02 » Mon Nov 22, 2010 2:36 am So i bought my 500 back from my friend for $200 after he tore the bike down and got it all powder coated Buy 6 Sigma Carb Jet Kit fits Honda CR125 CR250 CR450 CR500 Custom Mods Jetting Custom Performance Stage 1-3 Carburetor Jetting: Jets & Jet Kits - Amazon. I broke the bike in on this jetting and didn't remember it pinging though I was fairly easy on it. May 16, 2014 · Here is FMF and Pro Circuit jetting tips, I don't think 10cc will throw the jetting off that much. It is a PITA to start. The bike runs much better but the slide valve of my old 39 PWK is worn out and it costs about 130$(in Italy). Honestly the pro stock are just as good as any of the others. Feb 23, 2015 · Hello, I have a 93 CR 500 that started making a ticking noise after a new piston ring, hone and wrist pin change. I'm around 600' above sea level and running a 45 pilot jet. air screw 1 turn out. picked up a nice 1999 cr500, and it is all stock except for the fmf gnarly pipe and muffler. by 04 crf450 » Fri Dec 02, 2005 2:46 pm . Main Jet 380 2002 Pilot Jet 32. jetting Save Share Aug 22, 2015 · Adam Millar's CR500 Technical reference information and identification Thanks for all your hard work Adam. Its Aircooled and it will kablam easily! I did my 84' a tad rich or one step rich, to prevent gurnading it. I'll post back with results so we can compare how similar/different the CR500 is to the KX500 jetting. Apr 29, 2002 #1 Does anybody have the stock jetting specs Feb 22, 2004 · This bike has a keihn PWK 39. com Jun 9, 2010 · My '99 CR500 has a PWK 39. I took the carb apart and put all the non plastic stuff in the parts washer and blew everything out. I've got a 40mm PWK on my CR500 and like it. Add To Cart Quick View You will find a collection of chart images that illustrate different aspects of Chart Master: A Visual Reference of Charts for Everything, such as 2010 Wr300 Jetting Page 2 Rocky Mountain Dirt Riders, Cr500 Jetting Chart Fmf Jetting Chart, Honda Cr500 Thread Cr500r Cr480r Cr500af Adventure Rider, and more. The surging you described sounds like a big bore two stroke that is too lean. Check for air leaks too. 5 Needle STOCK Clip Position 3RD Air Screw 1. Plug looks perfect with this setting. Nov 30, 2015 · I run Pulse Injected PWK 38. Running a keihin PWK 72RA4 Carb with a 188 slow jet and 52 main jet. temp. Is this because of an increase in flow creating more vacume on the Nov 22, 2004 · The jetting is too rich all the way around where I have it right now. Q. Nevada is dry and open like SoCal. so were star Jun 12, 2015 · Im having fits jetting my cr250. Thank you! Main: 172 Pilot: 58 Premix: 40:1 Stock 87 with boyesen reed cage and fmf gnarly pipe May 17, 2021 · About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright Jan 13, 2012 · CRF450 clutch / CR500 springs / Trinity cover UNI filter Cut airbox lid w/ outerwears R&D Fuel screw (2 turns out) Jetting : 185 Main, 50 pilot, HRC needle third clip Fox FLOAT Evol shocks / Lonestar DC4 arms Pro-taper bars / Fly grips / Powermadd guards Moose bumper Maxxis Razr tires Dec 17, 2009 · "oldtimer" from this forum did the machine work for me at his shop and it beats every price on the internet. PWK Carburetor Standard JettinG. These same folks probably never pin it either and are accomplishing nothing. Feb 3, 2009 · CRF450 clutch / CR500 springs / Trinity cover UNI filter Cut airbox lid w/ outerwears R&D Fuel screw (2 turns out) Jetting : 185 Main, 50 pilot, HRC needle third clip Fox FLOAT Evol shocks / Lonestar DC4 arms Pro-taper bars / Fly grips / Powermadd guards Moose bumper Maxxis Razr tires Apr 14, 2008 · i hav a 89 cr 500 with 175 main and 55 pilot all standard carb ,shes had a 1. Mar 2, 2011 · Upon inspection, the pilot jet was caked up so i cleaned the rest of the carb. com/s/7co96yipkp57vwsvp10bznevxy7fso99 Dec 7, 2009 · Stock porting S/H P/C pipe Rad valve, Jetting Pilot 42, Main 170, Needle 1472 (DNG) 4th from the top, A/S 1. it also had a crazy amount of vibration, i know 500's do vibrate i have a a couple and ridin some of my friends and they did not have a filling dropping shake like this one did. From 1/4 on it seems to be great. Member. The rest is totally stock . probably changed it's dynamics. box. there is no problem really, but it's difficult to get a really smooth running on very light throttle opening. Also, while it can be made into a good trail bike, the 1998 or newer CR125 you have pictured is already much, much better and has more potential to be an even better trail bike. Bike is totally stock except for boyseen pro stock reeds. I'm having issues with a little idle surgi Applications: Honda CR500Model Years: AllThe VForce reed valve system by Moto Tassinari has been the reed valve system of choice by anyone serious about two-stroke engine performance for the last 10+ years. I have an 87 that needs some jetting help. This is my first time on a 500 and I think it's too rich up top. Jan 28, 2008 · I ride in hot weather and the jetting is to rich for me. Raising the clip, lowers the needle jet, creating a leaner mix and vice versa. The kit comes with instructions and charts that carefully walk through the installation process and offer guidance to help get peak performance at all elevations and in all conditions. After getting everything on Mar 23, 2010 · Main jet = 175 Pilot jet = 45 Needle = N3EJ Clip position = #2 Air screw setting = 1. Dec 26, 2010 · I have a cr500 that I just got a few weeks ago and I am trying to get the jetting dialed in. Mar 27, 2009 · first id get a new plug then clean the carb and as sugested the reeds the stock cr500 jetting was with 20;1 and if ure running 45;1 that means less oil so more fuel so you may need to run a smaller main jet if ure not revin clean up top May 25, 2020 · I checked the jetting on the LT500. dirt bike jetting chart related keywords suggestions, safely jetting your two stroke dirt bike kx guru racing, 2004 cr250r tmx 10a honda carburator carb jetting for trail riding part 2, 120 mph cr500 supermoto whats it take, cr500 jetting chart fmf jetting chart Carb is a 38mm off a 2000 CR250R, or a 96-97 KX250 89 CR500 Pilot 50 Main 168 CGK needle on the second clip #7 slide 1000 ft elevation FMF Fatty pipe cr500 jetting queston 04 crf450 Posts:198 Joined:Mon Apr 04, 2005 5:14 pm. Honda flopped back and forth on a 170 or 175 main for the big CR over several years. Slow, main, ne Feb 3, 2022 · Dudes jet according to the replacement carb's chart. Thursday I'll put the PWK back on, drop the jetting, try the KX500 needle, and the PJ/Honda needles to see which is best. Can anyone here confirm this? I know there is a dedicated forum, but what about the jetting while we're here? Similar numbers to the OEM carb? I am at sea level, hot climate. Apr 30, 2002 · 99 CR500 jetting. The main jet doesn't do anything appreciable below half throttle, and certainly doesn't affect starting. James Dean designed the JDJetting kits so that you don’t have to be an expert to get professional high performance results. Is this jetting jump sound normal or is it pointing to another problem? Thanks!!! Nov 16, 2007 · The pilot jet meters the fuel required for engine starting, idling and the initial throttle opening 0-1/8. I will probably have this bike buried with me when I die ,or it kills me. Dec 10, 2013 · For this edition Classic Steel we are going to step into the motocross Wayback machine to take a look at one of most infamous Open class machines of the eighties, the Honda 1984 CR500R. Jan 1, 2000 36 0. Pilot Jet:stock Main Jet:160 Needle:stock Needle Clip Position:stock Fuel Screw Type:Zip tie Fuel Screw Setting:2 AP Modified:yes Leak Jet:40 AP Cover:Boys. Basically. 1500 ft, 60-75 deg. Aug 28, 2001 · I have two CR500's that have been ported each time I had to go smaller on the main jet. Jetting – CRFsOnly. I have jetted it and it seems to keep the same needle position and pilot, but just a different main jet. May 15, 2006 · I just picked this bad boy up. I'm planning to wideing and raising the exhaust port. JD Jetting red/blue needles - Tech Help/Race Shop - Motocross Forums / Message Boards - Vital MX Jetting with 38MM PWK air Stryker: 52 Pilot, Needle 2nd clip (from top) 172 Main, Airscrew 1. We’ve spent countless hours of testing to determine which settings work best We’ve spent countless hours of testing to determine which settings work best Honda CR500 Performance Carburetor Jet Kit Custom Designed to your Exact Specifications at time of order. (610 to 3,048 meters), use the first size smaller je t. Nov 19, 2013 · I've rigged up the cr500 airbox boot with a foam filter on the end (waiting on a real filter to arrive) I have solid spark and just trying to really figure out where the best place to kick the bike is. Jun 10, 2014 · You should also look at the JD Jetting complete carb kit. Hollister/Carnigie But I will be taking it to Pismo Beach a Mar 6, 2012 · The best way to judge your slow speed jetting is the ease that the bike starts with. I was having too much fun to worry about it though Mar 15, 2012 · Well, there is smoother bikes than a ported 500 to use on the street. It is a precision metering instrument that provides extremely fine fuel atomization, precise mixture control, and air density compensation in a single circuit, jet-less fuel system. N85C needle #7 slide. When I had it apart the bike shop said the top end looked great and miked-out in specs, so just did rings and The MSV Racing ’85 and ’86 CR500 “Mondo” Coil is the modern high-performance upgrade to your OEM ignition coil. the bike seems like it wants an unusually large main(190), and pilot (62). I rode CR 500 (82. So how about the Carb? (stock is FCR13B) -Main jet size (stock is #145) Feb 20, 2007 · I have not been in the 2 stroke world for many years,but recently aquired a 91 cr500. It’s very difficult to tune out during the summer heat. Jan 17, 2002 · On the jetting what is listed above is correct on an AF . As I recall from my kart racing days , all the meth guys used racing castor, burned twice as much fuel to make 50% more power, and blew up a lot (perfect jetting was critical). The motor is a little tired and needs a top end so may Sep 7, 2002 · ok i built me a . cr500 jetting queston 04 crf450 Posts:198 Joined:Mon Apr 04, 2005 5:14 pm. PWK is the way to go. From what I've done on mine, and assuming you are on a stock bore , mild compression, and perhaps an aftermarket pipe, I would think that a 48-50 on the pilot jet would be a good place to start, and around a 155-160 on the main jet. You can tune the entire fuel circuit with the air screw. it seemed to give it a lil more pep in mid range and stretched the power band out a bit. oil mix is 32:1. overall im impressed with what i got for such a easy mod. The jet needle is about 1/4-3/4 and main is WOT. Piston. 25 overbore and a pro circuit pipe. 5 out Main Jet 175 1996 Pilot The Honda CR500 is a legendary two-stroke dirt bike that was king of the motocross world for over a decade. The silencer just looks stock. 2009 CR500AF (2005 CRF450X TTM) 1995 Motor. The 41mm is pretty big if you are doing single track or MX. What I have done to the bike so far: Sandblast and paint frame,new steering head bearings, fenders, radiator scoops, seat cover, kickstarter gears, water pump shaft shaft and seals, radiator hoses, entire clutch cover/water pump housing(had frozen and busted), chain, rear wheel Apr 8, 2018 · I kept the stock Keihin carb with stock jetting for both pilot and mainjets,set the float to factory specs,bumped needle clip to 4th position figuring the engine would need a lil extra fuel and put the air/fuel to the recommended factory setting of 1 1/2 turns out and even turned the idle screw that doubles as a choke knob to recommended Apr 19, 2003 · Hi! I'm off to do some porting of the CR500 cylinder. Picked up a clean 1988 CR500 today. Im going to initially run it on 110 octane. Elevation: 300 Ft. My 500 had a chronic problem blowing it's cylinder base gasket. I am not looking for max power but rather the best power across the board. Our coil provides a 28% stronger spark than the OEM coil. 5 running 32:1 (Castor 927) 50/50 100 octane and 91 (milled head) 48 pilot, DGN needle and 178-185 main (depending on temps) here in Vegas at 2400 feet. i have a feeling it was pretty far from perfect. any ideas? trying to get my 1998 cr500 jetted. Jul 2, 2014 · I have a question about jetting my trx450r. One ride and I'm hooked. Cleaned out the choke and everything and put the carb back in along with a fresh br9eg plug. when i first got it i could tell it was running a little lean. This JDJetting kit is purpose-built to improve throttle response throughout the RPM range. The simple premise of the VForce2 reed valve system is to increase engine power and throttle response by increasing the efficiency over a conventional reed valve design. 5 PWK keihin) since it is not 500 jetting advice Post by Fletch 2 » Mon May 18, 2009 6:41 am I have just taken my 500 (first one) for its first run after a major overhual, everything is stock apart from the procircuit pipe. And that is probably because of the bigger main jet. 7) It adds together the jetting from the idle jet and the needle/main jet to arrive at total jetting ratio thru the whole throtte range. 5 out Main Jet 172 1997 Pilot Jet 55 Needle STOCK Clip Position 2ND Air Screw 1. Posted February Dec 17, 2002 · 60 is big for your pilot jet however the boring of the carb. In 1984, Honda took a major gamble with their new CR500R, a gamble that in the end, did not pay… Jul 27, 2007 · Direct Drive clutch lockout, CR500 springs Jetting/Carb: #168, #45slow, NGPR needle 3rd clip, #55 Leakjet, Pilot 2 turns out. go pro died after run 1. FMF fatty pipe. I should have made the swap to the Air Striker a long time ago! I still don't have my '02 together. for jetting specs with the new pipe. Apr 9, 2019 · Jojo’s kart is fitted with a 110 octane-burning CR500 two-stroke engine that makes an insane 100HP to the rear wheels. I have a full two brothers exhaust, k&n air filter, and it has a bigger cam in it so the guy says that i got it from. This is a stock . i belive it may have been poor jetting but my plug looked perfect. It had a 170 main, 55 slow jet, needle was 2nd from the bottom. This change fixes it. my question is. 060 motor. 100% MX use. 750. Cheaper to replace the carb then the float, so on goes the new carburator. The carb is a PWK39 Quad Vent off a KTM. Remember that the air screw also affects the idle circuit and is used for fine tuning it once the slow speed jet is close to right. Wher Jun 10, 2013 · Hey all, I have an '89 cr500 which I was getting annoyed with the carb on. 13. My setup is posted below, please let me know if anyone has experience in jetting for altitude and any changes that need to be made. I live on the East Coast where the terrain is mostly woods and some mixed sand. Aug 17, 2020 · I just got a 38mm Keihn Airstriker carb for my 97CR500. Feb 14, 2008 · JD jetting kit Cr500. i imagine going from ball park jetting to optimum is going to be drastic. I made a test with PJ jets and needle (55 pilot,168 main and jr1368 needle 3rd clip position:on PJ clip was in 4th position from top). I have only changed the main/pilot jet once on my first ride out last season. Keihin PW-K 38mm Air Striker Carburetor For YZ250 RM125 CR250 KX250 cr500 ktm440 November 29, 2024 Jun 20, 2010 · I need help with a "brand new" CR 500. I was looking for something that I could tune in better, because the idle and choke on my Mar 11, 2019 · I need to find a baseline jetting for my 250r build. In fact I found them hit harder than the RAD valve. com Aug 24, 2011 · watz up?? new to this site with this 1st post. If so ,what are you running for carb jetting. The Mikuni carbs are notoriously terrible with the CR two-strokes from the 2000s, causing issues even with altitude or temperature changes. Where the jetting database would be helpful would be for jetting the aftermarket carbs I think. Cam designed by Jason Jones of JJones Racing. thorman75 "Team Apr 23, 2014 · I have a CR500AF that I recently did a carburetor swap on. Posted February 14, 2008. It is also deals eith the altitude much better than a stock PWK. Try a 1470 or 1472 needle jet (DGL or DGN, respectively, I'd use the DGL for the cold weather, IMO) with the clip in the third slot from the top or lower, and try a 170 main, or even a A JD Jetting Kit is included, with instructions for you to install (value $195). The silencer core (25mm) has been replaced with a 32mm (stock cr500), so the only original part is the shell. 00 inc GST. throw me some jet sizes plz! Oct 18, 2011 · I bought the CD1509D for the CR500 ignition, with the 2 curves option and the interface to program the cdi. I'll keep you all The PWK Air Striker swap is one of the best ways to save time and frustration when jetting problems cause the carburetor to keep fouling the plugs repetitively. com ; Pictures ; Address 1930 Carpenter RD SE Lacey, WA 98503-2915 United States of America Phone: 360-350-0557 Email: tech@jdjetting. I tried rocking it in gear like i have seen done online and it fired right up after th Address 1930 Carpenter RD SE Lacey, WA 98503-2915 United States of America Phone: 360-350-0557 Email: tech@jdjetting. JD Jetting jet kit JDH017. Current jetting is 50 pilot, 165 main, 1468D needle clip 2 and 55 Jan 10, 2010 · Bottom line a jetting database isn't going to be a whole lot of help. Mine is set up with a 180 and C-clip position 3. Adam has spent years and countless hours making this information available to everybody for free. opened up carb and surprised to find a 185 main jet, stock slow, Sep 18, 2009 · im jetting my 89 cr500. Sep 27, 2013 · Ok, so I know there is no magic number for what jets to start with, but Im looking for some thoughts and input here. 00, it was dark and I thought I was getting a good deal. Using An Excel Jetting Calculator This method of determining the right needle and main jet comes from two things: 1) the realization that even at full throttle the flow area around the needle (between it and its jet) has some force of flow restriction and so upper RPM jetting is dependant on both the needle and the main jet. It will flow more air than a 40mm according to Ron. 5 Stock: KX500 Main:168 Pilot:60 N82M Clip:3RD Air Screw:1 1/2 Pro Circuit: Main:168 Pilot:58 N82M Clip:2ND Air Screw:2 Turns. As far as jetting, I'd start with stock. (btw compression tested in at 125) I simply cannot get this thing to fire. The 38 is not rare on a 39. M. she wont idle stripped carb severall times blown out with airline, wont start using choke the only way i can start her is if i use quarter Yep, just got off the CR500 and moving onto a 450X. It has monster top end and mid range but I've been having rounds with the pilot circuit. Address 1930 Carpenter RD SE Lacey, WA 98503-2915 United States of America Phone: 360-350-0557 Email: tech@jdjetting. Recommended Posts. It currently has a 175 main jet and a 60 slow jet in a pwk carb. if you want your cr500 to turn over easier without tearing up your boots and leg, hit him up! sorry if this sounds like a commercial but i just wanted to let the forum know that i had him do this work for me and it turned out great! Jul 1, 2009 · Jetting has SO many variables, that all anyone on here will be able to give you are rough suggestions. I realize the PJ jetting primarily is the same except the Airstriker uses a smaller pilot (how much smaller?). Virtually Finding The Best Jetting 10) If you want to lower the blue jetting graph from 1/4 to 5/8 slide open then you'll need to 1) raise the needle clip # at B29 for a lower # at D32 to enter at C32, or 2) reduce the clearance between needle and needle jet by selecting a needle with fatter diameter or a needle jet with smaller diameter. I took it directly to a dyno after break in with the same jetting. Mainly because it seemed that the needle always would dump way too much fuel into it or not enough so I couldn't get my jetting right (and my slide was worn to crap). Right now it has 55/168, not sure about the needle. By martinfan30, February 15, 2011 in Vintage Dirt Bikes. For elevations above 10,000 feet, the second smaller jet should be used. What jetting are you guys running on your 500s with FMF / ProCircuit pipes? Carb is a Keihin PJ - seems to be running really rich, plug is very oily and powerband doesn’t feel great. I went back to stock jetting on the Jun 24, 2012 · It is a cr500 pipe. It starts easily cold now with choke ( this alone is a huge improvement), but without choke even after running for a couple of minut Jun 14, 2005 · Thanks to all. 5mm carb like the kx500's instead of the 38mm on cr500's. Bike was very weak when I rode it at home. as May 21, 2013 · I have a 98 cr500 that i had sized. By BrettJ, February 14, 2008 in Honda 2 Stroke. I ride at 5000'-7500' elevation and from 40-95 degrees. 175 main 60 pilot 40:1 Power Plus Lubricant Feb 22, 2001 · I bought a 1986 cr500 a couple of months ago for $450. New, stock cylinder & piston, stock pipe. If you purchase a new Air Striker and it comes with the wrong slide, jet, and/or needle, you will spend more than $245 getting it all together. LOL! Aug 24, 2021 · I've been told previously that an 85/86 flat slide carb is a direct bolt-in replacement for the round slide carb on the 84 CR500 and is a big improvement. I've been racing and jetting outboard motors for 30+ years. FMF: MainJet; 175; Pilot Jet; 58; Needle; STOCK; Needle Position; 2ND; Power Jet; N/A Air Screw; 1. Nov 25, 2014 · If you have 3 x CR500 with similar/same engine configs, the jetting in all 3 PWK should be the same. I bought a new 08 and I've read about cutting the air box. Because i knew the smart carb was coming i stuck baseline jetting in the pwk carb and ran it. I made an other test with 175 main but it seems too rich. Another long jet with the Keihin star and 85 on it(not sure what this is called sorry) Dec 30, 2010 · G'day guys, i'm wondering if someone can explain to me the CR500 jetting specs i obtained from the Pro Circuit website that i have highlighted?. 5 - 2 Slide = 7 Conclusions/Results = BINGO! That leaner needle and the smaller main jet were spot on for my local ride spot. If you need rough baseline numbers I found those in the honda manual to be quite good on the stock bike. All four of my CR500's have been to rich in my racing areas, Texas, Arizona, California. Aug 16, 2022 · Hello all, Recently purchased a 84 CR500. He sells a new Keihin 38mm PWK Air Striker pre-jetted with spare jets and needles for $245. 5 pwk. cr500 jetting queston. i have buy a v-force 2. CR500 riders is very good for info. It is the old style without the vanes on the intake side. Problem is in the first 1/4 turn its blubbering and has no smooth transition. The James Dean custom jetting kit is designed to improve throttle response throughout the rpm range by using specially made multi-taper needles. needle in the middle clip. My question is,are any of you riding close to sea level. i'm running a 90mm piston, mild porting, stock pj carb, and pc plat pipe. Honestly feels slower than my 1998 250 Aug 16, 2009 · Another long jet with the Keihin star and 85 on it(not sure what this is called sorry) I was thinking of changing jetting to, 170 main 45 pilot CGL or CGK needle #7 slide The bike is standard at the moment but will be upgrading to a full FMF system soon hopefully Elevation 0-500 feet 93 octane fuel mixed at 32-1 with maxxima 927 1996 CR500 Jun 10, 2014 · What is the best Carburetor for the CR500? I’m interested in your experiences with carbs for the CR500. The numbers might be different, so it would be wise to follow the chart and only use the jets recommended for that carb. i checked the jets and the main was a 170 and pilot jet was a 45. As i have been jetting my project 500 over the last few days i have just been dumbfounded by the jets that it seems to like, they seem really small for a 500 cc engine with a 39mm carb. Surely Jojo Owens goes overboard by matching the cases, punching out the Jun 24, 2013 · I built the bike this winter. I put a 150 main in, 50 slow, and dropped the needle to 2nd from the top. I just rebuilt my 500, and had it race ported and the head milled. Please remember that sometimes the stock OEM jetting will work just fine, other times you may have to make an adjustment, so use our suggestions below as a guide to help with your jetting problem. com FREE DELIVERY possible on eligible purchases. Jul 13, 2003 · I want a better carb than the PJ and there seems to be quite a few 39mm PWK's on e-bay. The only bike that I have ever owned that was spot on was a 2002 YZ250. You require the JDKH38. An example of choosing the correct jet size is shown on page 2. I owned an 87 cr 500 many years ago and experienced a similar problem while jetting it. It didn't ping during the dyno run. hey justin, long time bump here, but i finally got a chance to call the TT store and they said they do not have jet kits for my carb (39. Spark plug that’s in is a BR8EG. . just wondering what jets are preffered? i run 32:1 thanks Jump to content Motorcycle Jetting & Fuel Injection Hi all. #165 / #175 Mains, and #45 / #55 Pilots. Jets currently installed in the new carb are; Oct 7, 2011 · The Stock cr 500 jetting is a 170. Pilot felt a little fat, but could probably have been tuned out with the air screw. 92 CR500 with fatty pipe. After testing of 5 different ignition coils, we finally found an upgrade ignition coil that we feel is worthy of the mighty CR500. 80 Degrees, 750 Altitude. 42-45 would be most common. just bought a 97 cr500 and wanted to get carb dialed in. The CR500, depending on year, is NOT HARD to jet correctly. :) Post Reply. I can program the ignition timing advance for the whole range, but there is other options when you buy the cdi (more expensive) wich allow program power jet carb and differents timings curves at different throttle position. HONDA Jan 13, 2005 · hi, i have cr500 2001. Runs excellent, idles excellent and dead easy to jet. I’m currently running an air box with no lid, k&n filter with an outerwear, 87-89 air boot, 38mm airstryker, boyesen carbon reeds, rrp “mid” ported stock jug, cool head with a 22cc dome, and a curtis sparks mx pipe. NEW GENUINE KEIHIN PWK 39 CARBURETOR HONDA CR 500 CR500 CR500AF. Jun 6, 2013 · new to me cr500 engine, just installed in my ATC250R modified frame. STANDARD JET FIRST SMALLER JET SECOND SMALLER JET RECOMMENDED MAIN JET SIZE AND AVAILABLE ENGINE POWER IN RELATION TO ELEVATION AVAILABLE ENGINE POWER How to select the right 2 stroke carburetor needle. dont know about any engine mods except boyson reeds and a fmf turbine core 2 sparkarestor. First introduced in 1984, the CR500 was Honda’s answer to the growing demand for high-performance, big-bore motocross bikes. I decided it needed a top end after hearing a rattling at Lower throttle. com Apr 19, 2013 · Something else worth noting is the fact that all alcohols have oxygen molecules, this is what makes the fuel run so lean compared to gasoline , given the same jetting. Pretty good deal. Might need a bigger pilot with the cold, but you'll be all right. As some of you may know the Silver Tank had a Large 44mm Mikuni round slide carb & was rather fierce (made for Grand Prix Racing I think) ,also wasted fuel on v. Got it started and running good, but original carburator would dump gas out of the bottom once running. Sounds like for your type of riding i would go to a 52 pilot,possibly 172 or 175 main. I've read that a good rule of thumb is to open up the width of the port to 72% of the stroke. Add Power and Performance. the bike is so strong so you almost roll on increased idle at constant speed and that is difficult to jet perfect. CR500 Jetting https://app. What main, slow, and needle clip position should I be running for an elevation of 500 ft and around 65-70 degrees? He has just fitted a brand new PWK 40mm airstriker carb to it and is yet to sort out the jetting. If not, carb wear and/or external issues are present. Sep 15, 2013 · I replaced mine with a RAD valve and I have also had a CR500 with vForce. Feb 2, 2009 · 2000 CR500 Elevation: ~3000 feet Exhaust: FMF Gnarly & Q SA Premix: 40:1 HP2 Other mods: mild port work & Boyesen Pro Reeds. but my question is what affect will this mod have on my jetting?. Are the details listed beside CR500 the stock jetting specs? and the details beside Pro Circuit the jetting specs if a pro circuit pipe is applied to the bike? Jun 2, 2011 · I bought a CR500 jetted for sea level and I'm at 2200 ft. That’s attached to the piston in the carb and throttle cable. a pro circuit works pipe,procircuit 304 silencer, and a keihin pwk 41mm pro series. Shot Exhaust Type:FMF Power Bomb- Exhaust Modified:06 head port & polished stk valves and springs. Cleaned the bike up and did regular maintenance. Once you crank that throttle OPEN and get the dang needle out of the way, the main jet comes into play, AND NOT BEFORE! Folks often keep playing with the main jet trying to fix anything from hard starting to fouling plugs. I have completely restored this bike, EVERY bearing, seal, gasket in both the motor & the rest of the bike is new. Sep 17, 2010 · Hi there, Just a little addition to this thread. I'd like to get the air striker 38mm but that's not an option right now. That's all you are going to get, with some generic instructions. It's for an 1992 CR500. Here's my setup, let me know what you think please! 1987 Cr500, boyesen rad valve, FMF gnarly + PC silencer, Keihin PWK 38 Carb. JD Jetting kits are designed so that you don’t have to be an expert to get professional high performance results!! CR500 : 1985 - 2001 : Related products. Last night i was able to kick it over but it took me an hour of cursing and kicking. Feb 16, 2011 · 84 CR500 jetting. Fires right up when pull started. Sep 25, 2004 · i have an 85 cr500 and it is very strong on the low and midrange but mellows out on the top end, not sure if its a trait of these bike or we just need proper jetting, My engine mods consist of a boyesen rad valve and a pro circuit platinum pipe and factory sound silencer i also converted to 91-01 plastics, subframe, airbox, im running mc-1 at Apr 25, 2011 · CR500 PWK 39MM Jetting - Need Suggestions Please. Your slow jet/pilot jet is for idle to 1/4 throttle. otherwise it's really fun doing wheelies in 4th gear at 60-70 mph on just throttle:=). Jan 10, 2025 · This SC2 SmartCarb replaces the stock Honda CR500 carburetor. martinfan30. It has a 38mm Keihin PWK A/S or airstriker. BrettJ. Jul 2, 2014 · the fuel starvation is usually a jetting issue, my brother had to rejet his 40mm and said people with experience help, prior to running a GP he had his done and could pull the other big bores everywhere, tis was about 1990 and he was on a 1985 CR500 with the six speed change out, originally his was 4 speed Jun 1, 2007 · Main jet. With the JD jet kits I had the Mikunis working pretty well but I still had to tinker with the air screw and re-jet when the temperature changed much. im jetting my 89 cr500. Maybe the clip position. I'm running the recommended settings, Pilot 45, Clip 3, Main 175, Blue needle, 32:1 premix hp2 Gas on, apply the choke, lay bike on the ground for a few seconds until gas comes out, upright bike, bring kicklever to Here are our jetting suggestions for your CR500. But the few times he did ride he was mixing at 50:1. Share More sharing options Followers 0. Cam degreed. T. CNC billet aluminum construction; Patented single fuel circuit design; Extremely fine fuel atomization Feb 24, 2022 · So I finally tossed the blubbery stock round slide and installed an PWK 39 and followed a jetting suggestion on here for a starting point, but something is way off. Edited May 17, 2014 Check your jetting and carb. 5in spacer for my reed cage today, i have a 96 yam blaster bone stock. Product Code: NEW-PWK39 (CR500 JETTING) Availability: Pre-Order; $479. It came with a 175 keihn jet. *****if you are looking for a PWK carby for a late model KTM or Husky to replace your Mikuni carb. 5 JE High Comp. Feb 29, 2012 · I have a 01 CR 500 and it pings 1/2-WOT only uphill not the flats, when the power band is hitting? Running pwk 38mm airstriker 82m, 55p, EGL needle 5th clip down (rich). bumpy shorter tracks where not running at high revs via the o/flow tube. Add To Cart Quick View. Mar 30, 2011 · I'm not new to jetting. 8) It compares the calculated ratios with the ideal ratios and then graphs the result of the difference between the two as a blue line graph. It has a 175 main, 60 pilot, 4th needle clip. Feb 22, 2002 · After having CR500's for the last 5 years I have gone through stock, fmf and pro circuit. run 1 was 185 main jet, needle clip 1 clip from bottom. Thread starter Motolaw; Start date Apr 29, 2002 . The bike will probably loose some low end grunt. Now I find that crazy as all my two strokes have always been 32:1. Motolaw. Feb 29, 2004 · My question concerns jetting for a 95' CR500 with a ProCircuit pipe and V-Force2 reeds. and also the same as several years of regular CR500's. I am close to sea level know and it runs and starts good. completely rebuilt piston gaskets bearings ect. Main jet needle in clip position and what not. HONDA CR500 (85-01) $ 195. com Mar 28, 2011 · CRF450 clutch / CR500 springs / Trinity cover UNI filter Cut airbox lid w/ outerwears R&D Fuel screw (2 turns out) Jetting : 185 Main, 50 pilot, HRC needle third clip Fox FLOAT Evol shocks / Lonestar DC4 arms Pro-taper bars / Fly grips / Powermadd guards Moose bumper Maxxis Razr tires My jetting calculator is showing they have too long a straight section and so the taper kicks in too late, leaving the jetting too lean below 3/4 slide open. Having never ridden a properly jetted cr5 i have very little frame of reference. By F350JOHN, April 25, 2011 in Motorcycle Jetting & Fuel Injection. 1mm doesn't sound like much but I don't want any jetting or power problems. Jetting/N2O: 22N/21F (22hp) Pilot Jet:stock Main Jet:160 Needle:stock Needle Clip Position:stock Fuel Screw Type:Zip tie Fuel Screw Setting:2 AP Modified:yes Leak Jet:40 AP Cover:Boys. 5 out Main Jet 178 2000 Pilot Jet 45 Needle STOCK Clip Position 3RD Air Screw 1. A lean pilot jet setting will cause your engine to surge at very low RPM’s, bog or cut-out when the throttle is opened quickly and have trouble idling down. The past owner let the bike sit for years. I'm currently at sea level, taking a birthday trip up to Gorman ca which is 4000 ft. Jan 14, 2011 · The PWK will be easier to jet and give smoother overall response than the PJ. The carb is fitted with. fkux syfwnxr vll scmyaxb smkk qsmg nyfbxvz rab tqbqmz cnir