do raptor 660's knock a little
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do raptor 660's knock a little
it could be the gas octane your running i run nothing but premeium in my tanks for quads then you'll know for a fact it isnt that no matter what people say the higher the octane the cleaner it'll run am/pm gas sucks it'll cause your engine to knock some what...
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Alex Rodak
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09-13-2015 12:30 AM
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