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Old 08-24-2009, 07:40 AM
Bikeguy Joe Bikeguy Joe is offline
Godfather of Motorized Bicycles
Join Date: Jan 2008
Location: up north now
Posts: 11,531
Default Re: motor mount bolts

Grade 8 is total overkill, the threads will pull out of the aluminum before grade 5 will strip.

The "torque of the motor" didn't shear off the bolt, look for other causes.
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