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 (Polaris #3514989-027 or #3514998-027) 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 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 bea...

  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 (Polaris #3514989-016 or #3514998-016) 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...

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 (Green Stock Replacement) set/6

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

  BC Exclusive Yamaha 998 Rod Bearings by ACL - Green 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 Green (5JW-11656-30-00) 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...

BC4910N - New Polaris XP Turbo or XP1000 Crankcase w/ Linebore, Shuffle Pin, ARP main stud...

NEW CRANKCASE FROM BC - This is the hot setup for any Polaris RZR build (XPT and XP1000), especi...

NEW CRANKCASE FROM BC - This is the hot setup for any Polaris RZR build (XPT and XP1000), especially big horsepower (over 250whp), endurance racing or anyone who's had rod or crank failure and are searching for more reliability out of their RZR engine.  New crankcase supplied by BC (no core exchange required) that has been linebored, shuffle pinned and includes King main bearings and ARP2000 main studs. Please specify if XP Turbo, XP1000 or RS1 application. The BC 4340 billet XP crankshaf...

BC5901 - Polaris XP 1000 (2014-23) 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...

BC5910 - Fully Balanced Polaris XP Turbo (16-up) Stock Stroke Crankshaft 68mm w/270° Crank...

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 are fully system balanced to the following bobweight: •...

BC5911 - 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 are fully system balanced to the following bobwei...

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)

4340 billet crankshaft in stock stroke (66.2mm). Use SideWinder oil pump drive sprocket. All cran...

4340 billet crankshaft in stock stroke (66.2mm). Use SideWinder oil pump drive 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 cranks are fully system balanced to the following bobweight: • BC Rod (BC6953 w/19mm Pin): 440g • CP Piston (80mm bore): 272g • ...

BC8805 - Yamaha Sidewinder Oil Pump Drive Sprocket

Genuine Yamaha Sidewinder oil pump drive sprocket (#8KJ-1355-00) required for use on all BC Yamah...

Genuine Yamaha Sidewinder oil pump drive sprocket (#8KJ-1355-00) required for use on all BC Yamaha billet crankshafts. BC uses the Sidewinder 23 tooth timing gear design.