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Yamaha YXZ1000R / Textron Wildcat XX Stroker Kits
The BC stroker kit for the Yamaha YXZ engine platform incorporates a 71mm (+4.8mm) stroke in the OEM crank pin configuration. Depending on bore size that you decide, the BC kit will take you up to a 1071cc with stock 80mm bore or 1125cc with the big bore 82mm configuration. As usual, each BC kit features your choice of custom CP, JE or BME aluminum forged pistons, 5100 series wrist pins (9310 pins available upon request for big HP applications), locks and complete ring pack. Available in any desired bore and compression ratio.
  • BC 4340 billet steel crankshaft (71mm stroke).
  • BC 4340 ProH2K or Pro Series (ProH625+) connecting rods featuring ARP premium fasteners.
  • CP, JE or BME aluminum forged pistons (any bore size, any compression ratio).
  • 5100 Series carbon steel alloy wrist pins. 9310 Series pin upgrade avail.
  • Ductile iron plasma top rings, tapered second ring, low tension oil rings.
  • Fully system balanced and ready to install. (50% deposit required)
Stock Specification
Yamaha YXZ1000R / Textron Wildcat XX - 80mm Bore x 66.2mm Stroke - 6.985 Case Height
Stroker Kit # Crankshaft # Rod # Piston # Description Buy Now Status
BC0959 BC5951 BC6951 BC7951 - or - BC7952 BC STROKER KIT - BC 4340 Crank (71mm), BC ProH2K Rods, CP, JE or BME Custom Pistons In-Stock
BC0958 BC5951 BC6952 BC7951 - or - BC7952 BC STROKER KIT - BC 4340 Crank (71mm), BC Pro625+ Rods, CP, JE or BME Custom Pistons In-Stock
BC0957 BC5951 CA6952 BC7951 - or - BC7952 BC STROKER KIT - BC 4340 Crank (71mm), Carrillo Rods, CP, JE or BME Custom Pistons In-Stock
BC0954 BC5950 BC6952 CP, JE or BME Shelf BC STOCK STROKE KIT - BC 4340 Crank (66.2mm), BC Pro625+ Rods, CP, JE or BME Pistons In-Stock
BC0955 BC5950 BC6951 CP, JE or BME Shelf BC STOCK STROKE KIT - BC 4340 Crank (66.2mm), BC ProH2K Rods, CP, JE or BME Pistons In-Stock
BC0956 BC5950 CA6952 CP, JE or BME Shelf BC STOCK STROKE KIT - BC 4340 Crank (66.2mm), Carrillo Rods, CP, JE or BME Pistons In-Stock
Note: Requires Sidewinder oil pump sprocket for operation (#8KJ-13355-00-00). Also requires extensive case clearancing for operation.
YAMAHA SIDEWINDER OIL PUMP DRIVE GEAR
All BC Yamaha YXZ crankshafts are manufactured with the Yamaha Sidewinder oil pump gear which requires installing the smaller diameter Sidewinder oil pump drive gear on your existing oil pump.
Part # Description # Buy Kit Status
BC8805 Yamaha Sidewinder oil pump drive gear (#8KJ-13355-00) EMAIL
619.749.9018 ph
619.749.9128 fx
Some products listed are not legal for sale or use on emission controlled motor vehicles, RPM ranges vary on application.Warranty Information Copyright © Brian Crower Inc. All rights reserved..
WARNING: This product can expose you to chemicals, including Chromium (hexavalent compounds), lead and lead compounds, which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, visit www.p65warnings.ca.gov