Products

BC4901-2 - Polaris Pro R Rod Bearings (Blue Stock Replacement) set/8

BC Exclusive Pro R / SlingShot Rod Bearings by ACL - Midnight Blue New ACL rod bearings for ...

BC Exclusive Pro R / SlingShot Rod Bearings by ACL - Midnight Blue New ACL rod bearings for the Polaris Pro R engine are available exclusively through BC. These are equivalent to Polaris Midnight Blue in terms of sizing and fit the Pro R and SlingShot models. ACL Race Series performance engine bearings are manufactured to exacting tolerances. Micron tolerance machining supported by precision measurement systems delivers consistent accuracy to key characteristics like wall thickness and c...

BC4901HX-2 - Polaris Pro R Rod Bearings (White Stock Replacement) set/8

BC Exclusive Pro R/SlingShot Rod Bearings by ACL - White (+.001" clearance) New ACL rod bear...

BC Exclusive Pro R/SlingShot Rod Bearings by ACL - White (+.001" clearance) New ACL rod bearings for the Polaris Pro R engine are available exclusively through BC. These are equivalent to Polaris White in terms of sizing (extra .001" oil clearance) and fit the Pro R and SlingShot models. ACL Race Series performance engine bearings are manufactured to exacting tolerances. Micron tolerance machining supported by precision measurement systems delivers consistent accuracy to key characterist...

BC4902 - Can-Am X3 Main Bearings (#420933180 / #420933185 stock replacement) set/8

  BC Exclusive X3 Rod and Main Bearings by King New BC exclusive King rod and main bearing...

  BC Exclusive X3 Rod and Main Bearings by King New BC exclusive King rod and main bearings for the Can-Am X3 and other Rotax 900 ACE applications are available in King's proven pMaxBlack overlay and pMaxKote™ polymer coating. pMaxBlack is a surface hardened lead tin copper overlay that is electroplated onto a copper alloy substrate making up the third layer of a King XP bearing. pMaxBlack also has additional copper content, when compared to regular tri-metal bearing overlays, increasi...

BC4905 - Yamaha YXZ / 998 Rod Bearings (Brown Stock Replacement) set/6

  BC Exclusive Yamaha 998 Rod Bearings by ACL - Brown New ACL Race Series rod bearings for th...

  BC Exclusive Yamaha 998 Rod Bearings by ACL - Brown New ACL Race Series rod bearings for the Yamaha 998 engine (YXZ, SideWinder, Viper, Nytro, Vector, Venture, Viking, VKPro, WaveRunner V1, VK, VX, EX, FJR1300, Rage, Wolverine) are available exclusively through BC. These are equivalent to Yamaha Brown (5JW-11656-20-00) in terms of sizing and fit just about every model that utilizes the 998 Genesis world platform engine. ACL Race Series performance engine bearings are manufactured to exa...

BC4907 - Polaris XP1000/XP900 Rod Bearings (Yellow Stock Replacement) set/4

  BC Exclusive XP1000/XP900 Rod Bearings by ACL - Yellow New ACL rod bearings for the Polaris...

  BC Exclusive XP1000/XP900 Rod Bearings by ACL - Yellow New ACL rod bearings for the Polaris XP1000 and XP900 engines are available exclusively through BC. These are equivalent to Polaris Yellow in terms of sizing (standard) and fit the XP1000, General, Ranger and XP900 models. ACL Race Series performance engine bearings are manufactured to exacting tolerances. Micron tolerance machining supported by precision measurement systems delivers consistent accuracy to key characteristics like w...

BC5900 - Polaris XP 1000 (2014-23) 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 ...

BC5905 - Polaris XPEDITION XP1000 (23-up) Stroker Crankshaft 78mm w/180° Crank Pin

New Polaris XPEDITION crankshafts in 78mm stroke (180° pin) Stroker (+4.5mm) CNC machined from 43...

New Polaris XPEDITION crankshafts in 78mm stroke (180° pin) Stroker (+4.5mm) CNC machined from 4340 billet round bar. These cranks are purpose built for the non-stator side snout and feature the new PTO design snout in the 2024-up XP1000 engine. 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 usin...

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

BC5930 - Balanced CAN-AM X3 / ROTAX 900 ACE (17-up) BILLET CRANKSHAFT (69.7mm STROKE)

The BC stock stroke billet cranks, due to the counterweight correct design, do not require any he...

The BC stock stroke billet cranks, due to the counterweight correct design, do not require any heavy-metal to balance for aftermarket rods & pistons. Made from EN40, features a large radius snout for maximum horsepower capability. 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 ...

BC5933 - CAN-AM X3 (17-up) Large Radius EN40B BILLET CRANKSHAFT (73.5mm STROKE)

EN40B billet, large radius snout with an added .080" O.D. snout diameter and no radius around the...

EN40B billet, large radius snout with an added .080" O.D. snout diameter and no radius around the timing chain area to handle the most aggressive clutch and anti-lag setups. Builds full boost 2000 rpm sooner than stock stroke with unlimited boost capabilities. CNC machined from EN40B billet round bar, the hardest material available with through hardening capabilities not possible on standard 4340 steel. All cranks are stress relieved, shot peened, magna flux inspected and nitrided (multi step...

BC5951 - YAMAHA YXZ/SIDEWINDER (16-up) BILLET CRANKSHAFT (71mm 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 +4.8mm stroke (71mm). 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...

BC9991 - Polaris Cam Timing & Cylinder Holding Tool

This new 2 for 1 tool from BC functions as a camshaft timing plate for both the Polaris RZR XP Se...

This new 2 for 1 tool from BC functions as a camshaft timing plate for both the Polaris RZR XP Series (XPT, XP1000, XP900) and the Pro R cylinder heads as well as a cylinder hold down tool for the Polaris RZR XP's during engine assembly. The steel inserts are designed to hold the camshafts snuggly in place at TDC, unlike the aluminum sheet versions out there that flex or bend causing the camshafts to seize in the head. The rigidity also makes it much easier to set valve lash and install the c...