webi Posted September 10, 2010 Share Posted September 10, 2010 my yb100 just wont seem to go anywhere in 4th it either stays the same speed or like most of the time drop i change from 3rd to 4th at about 40-45mph bought 1 smaller sprocket no difference Link to comment Share on other sites More sharing options...
chris66 Posted September 10, 2010 Share Posted September 10, 2010 i sorry but it would seem you are losing power maybe worn bore or needs new rings,pipe blocked head coked up there is many reasons on old two stroke bikes to loose power. chris Link to comment Share on other sites More sharing options...
Moderator drewpy Posted September 10, 2010 Moderator Share Posted September 10, 2010 or brakes dragging Link to comment Share on other sites More sharing options...
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