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Thread: OS .75 AX vs. OS .61 SF ABC
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Old 11-21-2011, 03:18 PM
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Rendegade
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Default RE: OS .75 AX vs. OS .61 SF ABC
I recently fitted a 61SF to a nemesis thinking it'd go like stink. It did but wasn't fast enough.

I then grabbed a 91FX, fitted the same carb (7F) and the SF muffler and tried again. It was only marginally faster, but got very unhappy swinging an 11x11, where the 61 seemed OK with it.

All in all I think there was only about 1000rpm different between the 61 and the 91.
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