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Old February 11th, 2020, 11:41 AM   #8
nocturncal
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Name: Cal
Location: San Francisco
Join Date: Jun 2017

Motorcycle(s): '09 Ninja 250R

Posts: 180
Quote:
Originally Posted by DannoXYZ View Post
Excess oil should be scraped off by rings within seconds when running engine.

Hmmm, you may have had some grit or carbon chunk holding valve open earlier? Couple months ago someone reported something holding their valve open and giving really bad numbers. Then it freed itself and blew through.

At this point, I'd do piston-soak anyway. These bikes run really rich in high-end and has lots of carbon build-up.
Awesome, I'm gonna do the piston soak once my carbs come back. I'll post compression test results
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