Thread: Yamaha XT500
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Old 01-07-2013, 12:12 PM   #567
Sic Semper Tyrannis
Joined: Aug 2009
Oddometer: 624
Watch to see when it smokes.

get up to speed and cut throttle and coast down...more smoke or less?

Accelerate hard...more smoke or less?

The coast down test is pretty definitive test for valve seals.

I bet you have glazed or stuck piston rings.
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