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cam chain or something?

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i bought a 00 426 a couple months ago and initially had the plug fouling problem... but i think i figured it out. but more recently ive heard a strange noise from the left side of the engine. sort of a "sssst sst" after i let off the throttle and when im revving it. it also smokes more than usual when i start it, though it stops once its warmed up... it also has started to backfire when revved. it ran great when i got and i havent touched the carb. im wondering if the cam chain is loose and screwing up the timing... any thoughts?

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The cam chains have an automatic adjuster. If it was loose, then somethimg must be worn out, but I don't think so. The drive chain makes rattling noises. Look at motoman393's web site for a fix. The backfiring is a lean problem. Turn the fuel screw out a little and see if it goes away.

[ June 24, 2002: Message edited by: mxrider426 ]

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