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The piston is scoured, the cylinder might clean up with a light hone. The carbon on top of the piston is a non-issue. No oil, screeching rpm killed the engine. What caused the high rpm was probably a loose manifold, open vacuum line or air getting in someplace. No oil finished the job.
Pistons, rings and a new barrel are cheap. Fix the oil leak and find out what caused the rpm to go berserk.
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2021 Dong Fang Super 200- 1,161 miles
1991 Honda Nighthawk 250- 17,443 miles
2009 CF Moto Fashion- 18,608 miles
1983 Kawasaki 750 Spectre- 47,113 miles
twowheeler.yolasite.com/
That's 30,049 China Scootin miles and Counting.
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