RidingOn

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About RidingOn

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    California
  1. Can anybody please tell me the measured db rating of a stock yz400f with the stock exhaust system? Also, the stock yz muffler appears to have a turn-down tip. Are there replacement cores that will fit the stock muffler to reduce noise levels? I know they exist for the WR muffler but not sure about the yz. Thanks RidingOn