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High Comp and Yoshi Pipe - Weird Noise

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I have a 2010 CRF450 and just put in a 13:5:1 piston with a Yoshimura Ti system. When im riding and crack the throttle it's making a strange noise almost like two pieces of foam being rubbed together. eehhhheeee

I think I might need to get the ECU re-mapped???

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