Bike revving high. Engine damage possible?

  • Thread starter Thread starter wampum15
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wampum15

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Could a piston be damaged from high revs at low rpm? Carb cleaner didn't work. She's running lean. 85 FJ1100 motorcycle. Thanks.
At low speeds and idle the engine can rev up to 5000 rpm randomly after the bike is warmed up and feels like a bat out of hell. Carb cleaner didn't work. 85 FJ1100 bike. Am I harming the bike by not fixing it?
 
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