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my cr 250 is 5 teeth above stock,it has a 55 tooth rear, it has way too much torque for me, i weigh 135 140 pounds, the guy who had it beofre me weighed 350. i was intending on dropping it down to a 45 or go all out and get a 39 tooth. what kinda speed difference should i expect from a 45 or 39. and will it drop the torque down enough that my skinny butt can keep the front end down
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