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Old 01-26-2006, 03:00 PM
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Join Date: Dec 2003
Last Online: 10-31-2011 11:19 PM
Posts: 22
Default Re: 2002 cr250 surging?


Hi Guys... Ok, probably should have posted this a while I ago. I sold the Honda and bought a KTM, but I did get the Honda jetted spot on before I sold it. First, I put new ORIGINAL HONDA gaskets on eash side of the reed cage. I think the ones that came with the V-Force were cheap. They seemed to attract dust like they were saturating from the inside out with fuel/oil. Anyhow, I wouldn't have believed this if I didn't experience it first hand! I jetted my bike from the stock 380 main to a 410 for winter riding. When I got my bike out in the spring I forgot to re-jet. The bike ran way better w/ the 410 than the stock 380, and we were in muggy Florida heat. I ended up putting in a 400 main and playing w/ the pilot. I also tried a different nozzle, needle, and clip settings. Sorry, don't remember what combo I ended up going with! Anyhow, this is important... make ONE, and only ONE SMALL CHANGE at a time and see how it works. I believe I ended up with 400 main, 1 larger on the pilot than stock, and the S2 nozzle. My bike ran great for a whole season with that jetting. I would not have expected my bike to come that lean from the factory. Anyhow, I hope this helps somebody out!

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Old 01-26-2006, 03:03 PM
Faded's Avatar
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Join Date: Oct 2003
Last Online: 09-25-2019 01:17 PM
Location: Idaho... No, U-da-ho.
Posts: 3,394
Default Re: 2002 cr250 surging?

Originally Posted by FFRacing11x
An often overlooked area when trying to fix a lean spot is the exhaust junction. CR80s were nortorious for this. It is a possibility that if the exhaust is not sealing properly at the cylinder, it could be sucking air on the reversion.
I agree with T-dub and have noticed that many struggle with getting a good seal. The best fix I've found (again, T-dub's info that he's passed on to me) is using Permatex Ultra Copper sealer. Read the application instructions and allow plenty of time to cure and you'll be in business. Better than rubber O-rings, better than Chamber Seal, etc. Get some...

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Old 01-09-2010, 12:10 PM
MENNACE's Avatar
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Join Date: Jan 2010
Last Online: 02-07-2010 11:51 AM
Location: niagara falls
Posts: 20

I have been experiencing all dodgeaspans symptoms on my 96cr250. I suspect the reeds are not closing propperly once theyve got some heat in them possibly causing high idle and surging. This problem would not be noticed upon reed inspection cause by the time you get the cage out theyve cooled and snapped shut again. Ive picked up up some Boysen stock reeds and filed the cage so the reeds are sitting PERFECTLY flat.

Havent fired the bike up yet but if i do and the problem persists ive got some great info here to follow up,......ride on
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Old 03-23-2010, 01:22 PM
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Last Online: 03-28-2010 05:02 PM
Location: anchorage alaska
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if it does it when it is hot, it sounds more like an over rich condition to me. good luck on the reeds and let me know if they cure it. those are a good choice on all the bikes i have put them on over the years and they wear a really long time.

---------- Post added at 12:22 PM ---------- Previous post was at 12:20 PM ----------

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Old 04-12-2010, 10:15 PM
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Join Date: Jan 2004
Last Online: 12-07-2012 10:22 PM
Location: IL
Posts: 203

mine has done it only at idle when it is warmed up, Runs perfect otherwise. Don't believe it is an air leak, but after dealing with it a few years I am tired of it and gonna figure it out. I will post up the cause of mine as well.
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