Max-Torque SS Series Clone Clutch - 12T #35 Chain 3/4" Bore - Spec Class RacingOptimizing power transfer from the crankshaft to the rear axle requires precision engineered go kart parts, and the Max Torque SS Series 12T Clone Clutch delivers exactly that for spec engine classes. Designed for #35 chain setups with a 3 4" bore, this centrifugal shoe type drum clutch engages at a highly specific 2900 to 3200 RPM range. By delaying engagement until the engine enters its optimal torque band, drivers experience aggressive, slip free