BOLD MAGENTA part numbers are new for 2026 PARTS-UNLIMITED.COM 2026 | SNOW DRIVETRAIN DRIVETRAIN 438 DESCRIPTION PART # Flush, w/ Arctic Cat gear bosses 1140-0090 DESCRIPTION PART # 7.5:1 taper w/ Ski-Doo gear bosses 1140-0092 COMET 108 4-PRO •Comet 108 4-Pro clutches now accept OEM starter rings •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 tuneability • 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 NOTE: For calibrations contact a high performance specialist or Certified Parts Corporation. BORE DEPTH DESCRIPTION BELT WIDTH PART # 30 mm tapered flush Flush, w/ Arctic Cat gear bosses 1 3/8” (std.)/ 1 7/16” (opt.) 1140-00852 30 mm tapered flush Flush, w/ Yamaha gear bosses 1 3/8” (std.)/ 1 1/4” (opt.) 1140-00882 30 mm tapered flush Flush, w/ Polaris gear bosses 1 3/8” (std.)/ 1 1/4” (opt.) 1140-00862, 3 30 mm tapered +0.200” +0.200 Ski-Doo deep bore 1 3/8” (std.)/ 1 1/4” (opt.) 217504 30 mm tapered flush Flush, w/ Ski-Doo gear bosses 1 3/8” (std.)/ 1 1/4” (opt.) 1140-00892 30 mm tapered -0.140” -0.140 shallow bore 1 1/4” (std.)/ 1 3/8” (opt.) 217506 30 mm tapered +1.02” 7.5:1 taper w/ Ski-Doo gear bosses 1 3/8” (std.)/ 1 1/4” (opt.) 1140-00872, 4 33 mm tapered flush 1:10 taper w/ Arctic Cat gear bosses 1 3/8” (std.)/ 1 1/4” (opt.) 1140-00621, 2 1 For Arctic Cat models with 33 mm crankshaft. 2 Accepts OEM ring gear for electric start models. COMET 108-EXP HIGH-PERFORMANCE CLUTCHES • Designed for more power, more endurance, more of everything you need for speed – and now accept OEM starter rings for electric starters • 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) •1997 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. 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. See illustration on Parts Identification page. Belt width can be adjusted on clutch models that list more than one dimension. Std. = Clutch is pre-set to the belt width listed. Opt. = Clutch can be adjusted to the belt width listed. NOTE: Change any 108-EXP clutch to accept 1 7/16” belt width by installing one spacer washer under the spider washers from belt spacer kit PART #214393. BORE-DEPTH BELT WIDTH PART # 30 mm tapered -0.245” 1 1/4” 208300 30 mm tapered -0.250” 1 5/64” - 1 1/4 2083011 30 mm tapered +0.195” 1 5/16” 208302 30 mm tapered -0.200” 1 1/4” 208306 BORE-DEPTH BELT WIDTH PART # 30 mm tapered flush 1 1/4” 212600 1 Application is limited to twin-cylinder Yamaha models with an oil pump gear attached to the back side of the clutch. Will not fit GP433 1974-75 or GP440 1976. COMET 102-C HIGH-PERFORMANCE CLUTCHES •102-C clutches are available for 1 1/4” and 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 and reliable •Especially suited for high-performance use •Completely adjustable for any snowmobile engine’s power curve – simply change cam arms and springs •Must purchase cam arms and springs 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. NOTE: All 102-C clutches can be set for 1 5/16” belt widths by adding one PART #207398A belt spacer. 3 Not for use on models with 33 mm shaft. 4 Not for any Ski-Doo 08-10 models with 90-tooth OEM ring gear.
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