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Join Date: Feb 2006
Location: Sin City, Nevada
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You have more than enough posts to post a picture. The advice you get will depend upon what type and brand of shifter you are talking about. If it is a grip shifter it should not jump from one gear to another as there are pawls and indents inside the shifter that keep the shift in each position. If it is a bar end shifter you may only need to tighten up on the shifter. If that is the case, go to the Park Tool Website and look up "Bar End Shifter Service". The latter is far simpler than dealing with grip shifters. Takes seconds to fix.