BSR1 BSR1
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brief walk through of porting/head job.
From: BSR1
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5 comments
February 27, 2008
the bike went from 98 peak HP to 107. a gain of 9 peak but with a much better curve with gains all through the rev range. & that is with just a slip on exhaust & pump gas.
 
 
what was the hp gain? still waiting for the customer to get it mapped.