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Strange Vibrations/Noises

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Good day, I own a 03' 250f with approximately 40 hours of beginner riding. Over the past month the bike has developed a engine rattle (appears to be bottom end) during full throttle acceleration only. I change my oil & air filter every ride, valves checked every 10 hours and replaced piston rings at the 30 hour mark. The bike does not consume oil and have never seen any metal flakes during filter changes. All work was done by a certified Yamaha mechanic. The bike is stock with the exception of a Dr. D. pipe and x-10 ignition.

Any idea's ?? 😢

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Thanks gonzo,

I'm new at this, i'll check the mounts tonight, I've even replaced my pipe back to stock but the high pitched rattle is still evident!!

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