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Dirt Bike Brands - Other
sticking throttle
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[QUOTE="stef, post: 694727, member: 23012"] Three rides ago the throttle on my 2002 yz250 stuck open for a moment . I checked everything ie pulley , cable , spring retainer position , dirt etc . All perfect ! Last ride it happens again ,scary ! While loosening the carb top I hear a clicking sound from the slide being struck by the tps position roller. With slide out of carb I can and pulling tps up , I can easily recreate this condition of the tps stuck in the wfo condition . As i loosened the sender unit screw slightly the binding stopped , tightening it brougt binding back. On stripping the tps unit I saw a very distinct bright wear mark on the shaft . I used 220 grit emery paper to sand down the shaft and on re-assembly all binding was gone. the tps unit spring probably accounts for a third of the slide return force and if it is stuck it will send wfo info to the advance/ retard progam,causing the mystery sticking throttle ( I think ) . Will be trying it out this weekend ! [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
sticking throttle
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