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Old 12-01-2010, 09:32 AM   #11
def
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Joined: Feb 2004
Location: The woods and mountains of Alabama
Oddometer: 9,230
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Originally Posted by johnjen View Post
And did you notice that those cams are horsepower cams, not mid range torque cams? So while this may provide a top end speed boost you will loose low end and some mid range power. Which some may desire but it wouldn't be the best choice for going slow in the dirt.JJ
Boy, did I ever! After reducing the flywheel weight, blueprinting the engine, balancing, cleaning up the intake ports, installing Witham valve springs and adding RCMs, that 650 CC Triumph engine would turn ~10,000 RPM and made lots of HP above 4200 RPM.

The sounds of a vertical twin on song at 6000RPM and above gave me goosebumps!
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