CRANKSHAFTS

BC5900 - Polaris XP 1000 (14-up) Stock Stroke Crankshaft 73.5mm w/180° Crank Pin

Stock stroke 73.5mm XP 1000 (180° pin), CNC machined from 4340 billet round bar. All cranks are s...

Stock stroke 73.5mm XP 1000 (180° pin), CNC machined from 4340 billet round bar. All cranks are stress relieved, shot peened, magna flux inspected and nitrided (multi step heat treatment) for ultimate performance. Fully profiled counterweights, rod and main journals are finish sized to work with blue or green Polaris bearings using aftermarket rods. No balancing required prior to installation due to 180° offset pins. Stroke 73.5mm Rod Journal 40.93mm Main Journal 40.98mm Weight 19.2 ...

BC5901B - Fully Balanced Polaris XP 1000 (14-up) Stroker Crankshaft 78mm w/180° Crank Pin

78mm XP 1000 (180° pin) Stroker (+4.5mm) CNC machined from 4340 billet round bar. All cranks are ...

78mm XP 1000 (180° pin) Stroker (+4.5mm) CNC machined from 4340 billet round bar. All cranks are stress relieved, shot peened, magna flux inspected and nitrided (multi step heat treatment) for ultimate performance. Fully profiled counterweights, rod and main journals are finish sized to work with blue or green Polaris bearings using aftermarket rods. No balancing required prior to installation due to 180° offset pins. Stroke 78mm Rod Journal 40.93mm Main Journal 40.98mm Weight 19.2 L...

BC5910B - Fully Balanced Polaris XP Turbo (16-up) Stock Stroke Crankshaft 68mm w/270° Cran...

68mm XP Turbo (270° pin) Stock Stroke - This crank comes fully system balanced to customer bobwei...

68mm XP Turbo (270° pin) Stock Stroke - This crank comes fully system balanced to customer bobweight specifications. CNC machined from 4340 billet round bar. All cranks are stress relieved, shot peened, magna flux inspected and nitrided (multi step heat treatment) for ultimate performance. Fully profiled counterweights, rod and main journals are finish sized to work with blue or green Polaris bearings using aftermarket rods. These cranks must be fully system balanced prior to installation due...

BC5911-75B - Fully Balanced Polaris XP Turbo (16-up) Stroker Crankshaft 75mm w/270° Crank Pin

75mm XP Turbo (270° pin) Stock Stroke - This crank comes fully system balanced to customer bobwei...

75mm XP Turbo (270° pin) Stock Stroke - This crank comes fully system balanced to customer bobweight specifications. CNC machined from 4340 billet round bar. All cranks are stress relieved, shot peened, magna flux inspected and nitrided (multi step heat treatment) for ultimate performance. Fully profiled counterweights, rod and main journals are finish sized to work with blue or green Polaris bearings using aftermarket rods. These cranks must be fully system balanced prior to installation due...

BC5911B - Fully Balanced Polaris XP Turbo (16-up) Stroker Crankshaft 72.5mm w/270° Crank Pin

72.5mm XP Turbo (270° pin) Stroker (+4.5mm) - This crank comes fully system balanced to customer ...

72.5mm XP Turbo (270° pin) Stroker (+4.5mm) - This crank comes fully system balanced to customer bobweight specifications. CNC machined from 4340 billet round bar. All cranks are stress relieved, shot peened, magna flux inspected and nitrided (multi step heat treatment) for ultimate performance. Fully profiled counterweights, rod and main journals are finish sized to work with blue or green Polaris bearings using aftermarket rods. These cranks must be fully system balanced prior to installati...

BC5917 - Polaris Pro R (22-up) 78mm Stroke Crankshaft

78mm Pro R Stroker Crank - Standard weight design for boosted applications. CNC machined from 434...

78mm Pro R Stroker Crank - Standard weight design for boosted applications. CNC machined from 4340 billet round bar. All cranks are stress relieved, shot peened, magna flux inspected and nitrided (multi step heat treatment) for ultimate performance. Fully profiled counterweights, rod and main journals are finish sized to work with blue or green Polaris bearings using aftermarket rods.  Stroke 78mm Rod Journal 45mm Main Journal 52mm Weight 34 Lbs

BC5918 - Polaris Pro R (22-up) 41.40mm Destroker Crankshaft

Destroked 41.40mm Pro R Stroker Crankshaft. Looking to get your 4cyl down to 1200cc or lower disp...

Destroked 41.40mm Pro R Stroker Crankshaft. Looking to get your 4cyl down to 1200cc or lower displacement, this BC destroked design will get you there. CNC machined from 4340 billet round bar. All cranks are stress relieved, shot peened, magna flux inspected and nitrided (multi step heat treatment) for ultimate performance. Fully profiled counterweights. Stroke 41.40mm Rod Journal 45mm Main Journal 52mm Weight 34 Lbs

BC5932 - CAN-AM X3 (17-up) EN40B BILLET CRANKSHAFT (73.5mm STROKE)

EN40B billet, large radius snout with added .040" O.D. snout diameter. Good for short course, des...

EN40B billet, large radius snout with added .040" O.D. snout diameter. Good for short course, desert racing, even Ultra 4 and duner applications. Spool that bigger than stock turbo up quicker with a BC stroker crankshaft, CNC machined from EN40B billet round bar, the hardest material available with through hardening capabilities not possible on the standard 4340 steel. All cranks are stress relieved, shot peened, magna flux inspected and nitrided (multi step heat treatment) for ultimate perfo...

BC5950 - YAMAHA YXZ/SIDEWINDER (16-up) BILLET CRANKSHAFT (66.2mm STROKE)

These cranks are precision balanced if ordered as a BC stroker kit, bobweights required if using ...

These cranks are precision balanced if ordered as a BC stroker kit, bobweights required if using own piston and/or rod combo. 4340 billet crankshaft in stock stroke (66.2mm). MUST USE WITH SIDEWINDER OIL PUMP/SPROCKET. All cranks are stress relieved, shot peened, magna flux inspected and nitrided (multi step heat treatment) for ultimate performance. Fully profiled counterweights are designed for reduced windage through the crankcase creating less oil resistance for better rpm potential. These...