All cam arms sold here are 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 14percenten 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 All cam arms sold each
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