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Old 04-26-2013, 05:59 AM   #7395
Studly Adventurer
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Joined: Aug 2007
Location: Idaho
Oddometer: 940
Compression is the first wakeup call for sure on these big singles. I have run Wiseco 11:1, 102.4mm which worked well, though it actually calculated out to 10:1 when measured on install which is fine because that is about the upper limit for fuel availability.

After a crankshaft breakage issue I opted for an XR crank which necessitated a new piston. I went with a JE 11:1, 102mm which also calculated out to 10:1. It also works well and runs great, but it is noisier than the wiseco till it warms up.
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