- Either original equipment in the Comet drive clutches or a popular replacement for trail riding or racing
- 102-C, 108-C and 108-EXP clutches all use the same basic cam arm
- 108 4-PRO clutches use FOUR cam arms. (To find the required cam arm weight, add the weight of three cam arms used in a 108-EXP or other three-post clutch, add 14%, then divide by FOUR. This will give you the required new cam arm weight.)
- When ordering cam arms for a 108 4-PRO clutch, you must order FOUR cam arms to get the correct weight
- Comet arm weight objective is within .75 grams of that listed. Certified weights would be significantly more expensive. The variance may occasionally exceed 2 grams and is a result of greater or lesser arm density.
Fixed weight: 59.7 g
| Compatible Vehicles | |||
| Years | Make | Make | Notes |
| 1974-1975 | Arctic Cat | Cheetah 440 | |
| 1979-1980 | Arctic Cat | Jag 3000 FA | |
| 1979-1980 | Arctic Cat | Jag 3000 FC | |
| 1979-1980 | Arctic Cat | Lynx 2000 Single | |
| 1979-1980 | Arctic Cat | Lynx 2000 Twin | |
| 1977-1978 | Arctic Cat | Panther 4000 | |
| 1979-1980 | Arctic Cat | Trail Cat 300 | |
| 1980-1981 | Arctic Cat | Trail Cat 400 | |
| 1981-1982 | Ski-Doo | Elite 464E LC | |