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Fuel Grade Selection

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Mine runs fine on all grades, except maybe the occasional stumble on 87 octane. Lately I've been running 89. (S model with FCR carb)

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Depends on the bike

S is fine on 87

E/K needs 92

up the compression to 13.5 and you're looking at racing fuel

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Like the other guys said and I don't know how much you spend on gas a year for your bike, but, I ride 30 miles a day plus trails when I can and I spend less than $300 a year on gas. I run premium at around $2 a gallon. Regular is about $1.85, so, if I ran regular I would spend $278 a year. For the extra $1.83 a month, I treat my bike right.

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