hpi .25 motor
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Join Date: Jan 2004
Location: Pittsboro, IN
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RE: hpi .25 motor
could be a stripped spur gear so check the teeth on it.Then make sure the slipper clutch is set properly.Refer to your manual on both.If it revs up and runs well its propably not to rich.If the spur is stripped it sometimes will make a high pitched squealing noise.