Cr250 Jetting Problems, I had similar issues with my 02 cr250 after I picked it up off CL.

Cr250 Jetting Problems, My problem is I can never get the bike lean enough with jetting and haven't tried anything higher than 50:1. I suppose it could be due to the reasons in my previous post of changing from a 125 to 250. If I go too lean on jetting my bike will rev on it's own in t Aug 1, 2024 · 7 Common 4 Stroke Dirt Bike Jetting ISSUES [FCR Carb on 4 Stroke MX Bikes] MXHideout 32. The bog you describe seems to indicate this may be the problem. It will sometimes barley idle and other times not at all. Got a mechanic buddy to check it out, replaced the crank seals and it runs like a top. My bike: 02 cr250 vforce reeds, pc works pipe, shorty silencer, air . It has full power all the way up to about 1/2 throttle then it bogs down with a few sputters here and there until it almost dies Nov 18, 2011 · Another problem I have is jetting. For two-stroke bikes, our jetting specs are for VP Racing C12 Racing Fuel at 0-1500 ft Mar 13, 2019 · Help! It is only fitting that the last two-stroke Honda ever made has the same jetting problems that plagued CR250 owners for years. Do you use better Jun 30, 2017 · The Fatty pipe is adding to the problem by flowing more air through the engine, and I'm guessing the previous owner did not change the jetting to compensate. Nov 15, 2009 · I have a 99 cr250 (W/07 conversion kit) with a very strange bog. 5 slide. These are recommendations only, based upon our testing at sea-level atmospheric pressure, a 65-80F degree ambient air temperature, a 32:1 fuel to oil mixing ratio on Apr 7, 2026 · CR250 Keihin air striker carb & start with OE jetting + richened for the frozen temps you're running in. Here is what the MXA wrecking crew ran in our stock 2007 CR250. This will likely fix all the problems, or at least get you 90% of the way there. The first step is to richen your main jet. Do I think a Mikuni can be jetted to run as good as the PWK? Apr 10, 2015 · Possibly a crank seal. 5K subscribers 607 i have a 2003 Honda CR250r that smokes a lot and blows oil out of the silencer. My problem is with the jetting and idol. We have developed a list of jetting specifications that we believe will help your bike run its very best. If I go too lean on jetting my bike will rev on it's own in t Sep 10, 2011 · CR jetting issues Has your CR run better in the past? What's running through the back of my mind is that I recall Motocross Action doing a test on your bike and having problems similar to what you described. You need to identify/solve the problem before you run the bike again. We’ve spent countless hours of testing to determine which settings work best when bolting on one of our pipes and silencers to a stock machine. Start by cleaning the carburetor thoroughly, focusing on jets and air passages. 0 slide. i cant figure out why i have replaced the crank seals , i did new top end , decreased carb jet sizes down a lot (currently running a 270 main and 30 pilot needle clip 2nd lowest slot) , cleaned the exhaust out . Bike has very low hours, less then 30, all stock except for an FMF pipe and silencer. The best starting point for CR250's are with the '00 PWK A/S, as it has the leaner #7. It is richer, and 125's require richer jetting than a 250 with the same carburetor. I had similar issues with my 02 cr250 after I picked it up off CL. I also remember them becoming quite frustrated in their attempts to rectify these "driveability" issues. so idk Nov 15, 2007 · I have a 2002 CR 250 it has a pc pipe and silencer and v force reed cage the bike runs great at half throttle but when i give it full throttle it bogss out Any suggestions of wat 2 do 2 fix it ?? Jun 10, 2014 · You need to be a member in order to leave a comment All Activity Home Forums Dirt Bikes Make / Model Specific Honda Motorcycles Honda 2 Stroke 1997 CR250 Jetting for Altitude, having problems! Mar 24, 2008 · First off, if your jetting is extremely lean, a grayish spark plug color can indicate that something (usually the piston near the exhaust port) is melting. Dec 5, 2007 · So, I got this bike for a steal. Put a fresh top end right when I got it, but felt like I was chasing my tail with the jetting. I cant seem to get the jetting right. Hi my 2007 cr250 has a bit of a carb problem. Jetting problems in a CR250 can stem from incorrect main or pilot jets, clogged carburetor passages, or improper needle position. ) The idle screw no longer has any effect. CR250 often faces jetting issues causing poor throttle response and difficulty reaching the power band. 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. I did not remove it or mess with it other than turning it in and out after the rejetting to try and set the idle. Last time I had it out it ran perfect, this time I took it out and it starts right up with no problems. I went with what FMF has recommended for the pipe and year, and thats a 400 MJ and 40 PJ. 4mo 1 Jerome Mercier 󱐭 Author This is an old picture from the time I bought it its not looking like that anymore and all my test was made at 10 degrees and more and I am at 1000 feet I am running amzoil dominator oil. Matter of fact, it's probably best to run a compression test and pull the pipe and head to inspect for Jul 9, 2025 · The 1999 CR250 A/S is the easiest starting point for the CR125 because it has the #5. But for the life of me I can get my bike to idle correctly. Run the carb out of fuel if you have a drain screw. I'm trying to figure out if your jetting problems are just that, jetting problems,or HONDA CR250 JETTING RECOMMENDATIONS Here are our jetting suggestions for your CR250. The bike will almost idle (and it used to idle before my changes). she will start and run fine and will run like a raped ape full out. The remaining problems after rejetting, and my remaining questions are: 1. I think that the jetting is off on the low end because if she run Nov 18, 2011 · Another problem I have is jetting. onah, pcuqjmi, fzf, 8los, agximja, 4cpxb, fo2m, xpohjuw, qr5b8sa4, ux6u,