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Thats what I figured you meant. I was just trying to say as far as a "stunt" bike you wouldnt notice much differance due to the sprockets and everything.
Yeah your right as far as stunting in a lot goes theres not much differnce, me and my friend with the ZX6RR are both geared the same(+16)...And doing idle stuff I dont really notice much of a difference, its only when you start to ring the bike out that you notice the differnce in power/torque...
If it was a lot only bike I wouldnt stress to get the 636, but for the street/stunt Id prefer a 636.....