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Old 07-03-2009, 05:47 AM
Bikeguy Joe Bikeguy Joe is offline
Godfather of Motorized Bicycles
Join Date: Jan 2008
Location: up north now
Posts: 11,531
Default Re: making rattling noise over 24mph

Sounds like typical piston slap.
Sometimes....the motor mounts will loosen and it sounds like detonation. Check those.
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