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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
2003 Cr250 Bogging Down ,,, Please Help,,,,
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[QUOTE="kneedrag05, post: 1433922, member: 124734"] I have done countless hours of research on these bikes as I have an 06 CR250 and they are often lumped in the same category as the "3rd gen" CR250's (there are significant differences) A couple things you need to do to get some things figured out. 1. Replace the plug (and get a few spares) from the auto parts store. they have the same NGK plug at half the price. 2. Check the air filter. clean and re-oil at least and possibly replace. 3. Inspect the reeds. Cracked, chipped or frayed reeds are no good. 4. Do a compression check. 5. Change your transmission fluid and measure the exact amount you put in. Ride it for an hour or so. Drain the fluid and measure it. If there is a significant difference in the amount then you have a bad crank seal. Once you have done all the base line/cheap/easy stuff, then look at jetting. Jetting is more of an art than a science but there is science to it. You will need to re-pack your silencer, start with a new plug, and go to stock settings as per the manual. Something else you might want to consider is switching to an '05-'07 base gasket. They were thinner slightly raising compression and improving bottom end response. You will want to do this before jetting though. [/QUOTE]
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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
2003 Cr250 Bogging Down ,,, Please Help,,,,
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