CLUTCH
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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-PROWITH OEM GEAR BOSSES For Electric Start
219600
Arctic Cat 30mm 1:10 tapered flush bore
501.65
E
219603
Polaris 30mm 1:10 tapered bore -.170”
501.65
E
219607
Ski Doo 30mm 1:7.50 tapered bore +1.02”
501.65
E
219803
Yamaha 30mm 1:10 tapered flush bore
501.65
E
108 EXP 2005 WITH OEM GEAR BOSSES For Electric Start
219500
Arctic Cat 30mm 1:10 taper flush bore
1-3/8”
373.75
E
219503
Polaris 30mm 1:10 taper -.170”
1-3/8”
373.75
E
219507
Ski Doo 30mm 1:7.5 taper +1.02”
1-3/8”
373.75
E
219508
Arctic Cat 33mm 1:10 tapered flush bore N/A
373.75
E
219703
Yamaha 30mm 1:10 tapered flush bore
N/A
373.75
E
219903
Ski Doo 30mm 1:10 taper + .056”
N/A
373.75
E
PART # BORE DEPTH
BELT WIDTH CAM ARMS SPRING/COLOR
212600
30mm tapered - flush 1-1/4”
Not Included Not Included
349.99
E
