Genuine Comet Clutch. 1" Bore, 12 Tooth Clutch for 35 Chain - 3/8" Pitch. Comet SCS 400 Series Centrifugal Clutches are rated for 3 to 7hp engines, rear wheels 15" or shorter. Requires a crankshaft with a 1/4" keyway and tapped end so you can screw a bolt into the end of the crankshaft to hold the clutch on. Comet Industries USA.

  
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