Originally Posted by addicted427
I see that they sell a lot of different rotors for the revtech motors.
What is the difference on the rotors.? 12.3 12.4 12.5. How can I tell what rotor my revtech has in it now....I bought it used.
is the size of the rotor, some rotors have color coded rings on them, get a pair of calipers and measure the rotor, then you will know. generally, 12.3 is going to have more rpm, 12.5 is going to have more torque
#49, #25a, #91, #7, #12 the ones to watch.... UPDATE. #12 is your new AMA GNC #1
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