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Old 04-01-2012, 11:45 AM   #9
yzmaico
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Joined: Nov 2010
Location: Seminole, Fla
Oddometer: 305
Sthealy makes a nice flywheel weight for Ktm's, I run an 11oz on my '09 250sx.

Change the power valve spring ( very easy to do ) to the green colored spring and turn in the brass adjuster a few turns, this will slow down how fast the power valve opens and make the bike more user friendly.

The XC uses a lower comp head but I'm not sure how much you would notice that change, the cylinders are the same.

http://www.google.com/url?sa=t&rct=j...2021aySL5CsJ7Q
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