Question about 1980 Yamaha XS 650 G
Restoring this bike, I can't find what the compression should be. I ran a compression test and originally got 120 psi, then I put a little oil in the cylinders and got 240 psi. The engine will not pop with 120 but it did pop ( a little) with 240. Please help.
The compression should be around 150psi, but at 120psi it should pop, try to readjust the valve clearance.
Hope this helps!
Posted on Jun 21, 2009
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Posted on Jan 02, 2017
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