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About Wappa1

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  1. Wappa1

    HELP!!! 03 450 Breaking Down

    Thanks for the tips... The jetting is currently standard pilot with a 172 main and needle in the standard position. I will go over the hot start cable and check for leaks at the carbie and header.
  2. I am having issues with my 03 CRF 450 breaking down at high revs (and "popping when backing off) . It seems to get worse as it gets hotter. The bike is stock with a fresh top end. I am at the end of my patience as I have tried new spark plug, cleaning out carbie, new cdi and a new coil. This is starting to get the better of me so any advice will be graetly appreciated.