Thread: Gearing/Overheating advice CAT SX
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Old 21-12-2009
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Rich, which version of Orion motor is it?? and any ideas which rotor??

I ran an Speed Passion 5.5 on 21-83 - EVERYWHERE! Indoors, outdoors virtually regardless! This was with 12.5mm rotor, I dropped to 12mm rotor to smooth the power delivery a touch and went to 20 pinion. Smoother bottom end, more top!

23/33 is the internal ratio I always ran. I think this is Kit std, but not 100% sure, as i've never had a kit!
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