20 TOOTH CLUTCH DRIVE GEAR Cosa

20 TOOTH CLUTCH DRIVE GEAR FOR LATE COSA 8 SPRING CLUTCH. The clutch drive gears are available in various sizes, for the 125-150 with either a 67 or 68 tooth drive gear the following clutch drive gears are available, 20, 21, 22, 23, the higher the tooth count on the clutch gear the higher the gear ratio will be, the normal way to find the gear ratio, is to take the higher number and devide it by the lower number, so a 20/68 would be 3.4 to 1 ratio, and moving up to a 22/68 ratio would raise the gearing to a 3.09 to 1 (about a 10% increase in gear ratio) Cross reference 286899, 2868994. Standard Fitment LML STAR 125 2 STROKE VESPA 125 - PX125E DISC 1998 ON VESPA 125 - T5 125 1986-1990 VESPA 125 - T5 125 CLASSIC 1991-2000 VESPA 125 COSA