Dennis Kirk stocks a large selection of Comet cam arms for all 100, 101, 102, 108-C, 108-EXP and 108 4-PRO clutches
Refer to the Comet tuning manual to help select the proper profile
To determine the proper cam arm weight for a 108 4-PRO clutch (four cam arms), use the following formula: Weight of recommended 108-EXP cam arm (from Applications) x .855 = recommended cam arm weight for 108 4-PRO
The weight listed is their objective per arm but may vary up to .75 grams due to the variation in material density resulting from the manufacturing process
All cam arms are sold each and include the bushing (installed)
Bushings are easily removable for clutches that require it
NOTE: 102-C, 108-C and 108-EXP clutches all use the same basic cam arm. However, the 1993 108-EXP clutch does not use cam arm bushings. You need only to push the bushings out of any of the current cam arms, which all include them. 1994-present 108-EXP and 108 4-PRO clutches use cam arms with bushings like the 102-C and 108-C.
NOTE: Use this cam arm for High-Altitude on the following models