She’s Alive!

March 25, 2010

My YFZ450 started for the first time today after I rebuilt the engine! So exciting! Turned out what was causing the engine to backfire and not start was a mis-aligned shim under the cam buckets which was causing the valve to be held open. Fixed that and she started up like a charm. Need to put the chassis back together and get out to the track for breakin now.

Shim shifter off center

Properly timed

Video of it running


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