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Old 29-07-18, 09:12
redbikejohn redbikejohn is offline
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Join Date: Sep 2010
Location: high wycombe
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In my experience when a gear jumps it's caused by the "dogs" on the gear (the three prong like bits sticking out the side of the gear not the gear teeth) being worn. This causes the gears to slip back down the box. You can dress the faces of the dogs to stop it happening but that is a bit of a bodge as gears are case hardened.
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