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Old 06-27-2009, 09:41 AM
matt167 matt167 is offline
Motorized Bicycle Elite Member
Join Date: May 2009
Location: usa
Posts: 420
Default Re: Rear sprocket and EPA questions

probably not much, as it's likely a small amount, as the engines at there biggest is less than 70cc..

catalitic conversion just changes the chemical makeup of the exhaust gasses
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