Quote:
Originally Posted by PAUL K
87 cc E-head converted by Butler to their CNC wideport and then touched up by Knowlton.... starting out life as an 87 cc head, definitely would've held them back a few horsepower compared to a 72cc head. Interesting read though. I believe all involved tried their best.
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http://forums.maxperformanceinc.com/...light=wideport
For those who want to read about it. ^^^^^^