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Old 04-06-2013, 11:43 AM
rob.smith rob.smith is offline
Motorized Bicycle Member
Join Date: Oct 2011
Location: sd
Posts: 27
Default Re: Motorized Bicycle Take a Tip...Leave a Tip

how come the ports on all of these engines are rectangular and all of the ports on the inlet and exhaust are little circles? is this hurting my performance?
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