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xr100-120cc wiseco 12:1 kit ?


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I put a 12:1 120cc 58mm wiseco kit on my 2002 xr100, the head has been port and polished, has a aftermarket filter and the 200 atc carb,big gun exhaust, but I can't get it started I checked spark, and I am getting fuel, timing is correct. I have 91 octane in it could that be the problem? any help would be appreciated. thanks

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No, everyone around here runs 91 with no problems. If they have another bike running race fuel, they might mix it a bit, but I never do. If you can hear pin and detonate, than yes, but otherwise no. IMHO

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