YOU WOULD HAVE GREAT ACCELERATION WITH A 12 TOOTH CLUTCH BELL.BUT WOULD LOSE SOME TOP END SPEED DUE TO THE MOTOR REACHING ITS TOP REVS FASTER.IN MY EXPERIANCE I FOUND THE 13 TOOTH TO BE GREAT.BUT IF YOU DONT MIND LOSING A LITTLE TOP SPEED AND WANT TO GAIN ACCELRATION THEN THAT WOULD WORK.

HAPPY R/CIN TO YOU