Just tried to tighten the diff as it was loose, not sure if this is the issue though. Got half a turn on it and the tip of the screw has stripped. I can't afford to buy another plus postage (and won't get one by Tuesday anyway!) so that means I can't race again.. 3 weeks on the trot now.. Think I'll just get a gear diff. Had more problems with the ball diff than any other I've owned.. Can't understand how the tip can even strip like that..
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