CLUTCH accessories body & chassis engine electrical & ignition controls fuel & intake rewind clutch drive rear suspension front suspension traction mini sleds chemicals tools & shop trailer & towing 765 WINTER CATALOG FAST SAME DAY SHIPPING COMET 108 4-PRO • Go for the gold with Comet’s 108 4-Pro clutch • Added fourth load-bearing member increases roller and button life • These race clutches are for high-performance applications ONLY • Clutch uses four clutch weights to greatly enhance tunability • To determine arm, add weight of three arms used in 108 EXP, add 14%, then divide by four; this will be the new arm weight to use • Arms can be used in sets of two to better zero-in on desired weight • Uses same springs as 102-C and 108 EXP clutches • Captivated tower allows shouldered cover bolts to virtually eliminate tower spreading • Each features a new bushing in the movable face and redesigned fixed face for increased durability IMPORTANT NOTE: These clutches are for racing use only. For calibration, contact a high performance specialist or Comet Industries. COMET 108 EXP • Designed for more power, more endurance, more of everything you need for speed • Tried, tested and built to handle high-horsepower engines • Consistently smooth shifting even after hours of use • Wider rollers for increased bearing area (33% more) • 1977 and newer 108-EXP clutches include special recessed mounting bolt with special pilot washer • Each features a bushing in the movable face and redesigned fixed face for increased durability • Uncalibrated clutches are sold without cam arms and spring NOTE: 108-EXP clutches use the same cam arms and spring as the 108-C COMET 102-C • 102-C clutches are available for 1-3/16”, 1-1/4”, & 1-5/16” belt widths • See Comet’s 108-EXP clutches for 1-3/8” belt widths and additional 1-1/4” widths • Lightweight, strong, & reliable • Especially suited for high-performance use • Completely adjustable for any snowmobile engine’s power curve - simply change cam arms and spring • Seven models are pre-calibrated for the majority of applications • Uncalibrated models also available for custom tuning - must purchase cam arms and spring separately • Two-piece roller design matches 1985 production NOTE: A flush bore depth indicates the taper begins exactly at the inner edge of the fixed face casting. Positive (+) numbers indicate the taper starts the specified distance into the casting, while negative (-) numbers indicate the taper begins in an extension out of the fixed face casting. 108 4-PRO WITH OEM GEAR BOSSES For Electric Start 219600 501.64 Arctic Cat 30mm 1:10 tapered flush bore 219603 501.64 Polaris 30mm 1:10 tapered bore -.170” 219607 501.64 Ski Doo 30mm 1:7.50 tapered bore +1.02” 219803 501.64 Yamaha 30mm 1:10 tapered flush bore 108 EXP 2005 WITH OEM GEAR BOSSES For Electric Start 219500 401.80 Arctic Cat 30mm 1:10 taper flush bore 1-3/8” 219503 401.80 Polaris 30mm 1:10 taper -.170” 1-3/8” 219507 401.80 Ski Doo 30mm 1:7.5 taper +1.02” 1-3/8” 219508 401.80 Arctic Cat 33mm 1:10 tapered flush bore N/A 219703 401.80 Yamaha 30mm 1:10 tapered flush bore N/A 219903 401.80 Ski Doo 30mm 1:10 taper + .056” N/A PART # BORE DEPTH BELTWIDTH CAM ARMS SPRING/COLOR 212600 376.85 30mm tapered - flush 1-1/4” Not Included Not Included
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