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About PdubRiz

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  1. PdubRiz

    New to me xr100

    I just went though this and decided to go with pulling the head, drilling and tapping to 12mm and used a 12mm spark plug, ngk dr8hs. Fired right up and runs great. Sure pulling the head requires removing the engine and having to do some reading up on the timing, etc... but overall it's doable if you have solid basic mechanical skills. I looked at it as if I try leaving the head on and end up killing the motor then I have to pull it anyways and have a bigger repair job/bill or replace it all together.