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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
CR250 Fouling Plugs HELP!!!
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[QUOTE="steve.emma, post: 1215442, member: 36039"] it sounds like you have covered the basics pretty well. the keihin might run 'better' but like its allready been pointed out the bike [B]used[/B] to run fine so changing carbs is not the issue. remove and clean the powervalve but i doubt thats your problem, if it was seized or not working then there would be major running issues that you would notice like lack of top end or bottom end power etc.. this plug fouling could well be due to an electical issue i.e. poor spark. is the bike hard to start when cold? generator and pulse coils can be checked but its not easy to do and is best left to a dealer.a bad coil or cdi unit could also be the fault in either spark output or ignition timing, this is something that again is kinda hard to diagnose at home unless you have the correct tools and knowledge. if you had a friend with the same year cr you could try swap cdi units and see if that makes a difference. lastly something you [B]can[/B] do is check the coil to frame earth connections, then check the motor to frame earth connections etc.. as if these are bad this will effect spark. good luck. :cool: [/QUOTE]
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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
CR250 Fouling Plugs HELP!!!
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