Brian Crower BC0958 Yamaha YXZ Sidewinder Stroker Kit with PRO625+ Rods

The Brian Crower BC0958 is a complete stroker kit engineered for 2016 and newer Yamaha YXZ and Sidewinder engines. This high-performance engine rebuild package is designed to significantly increase displacement and power output through premium internal components.

What's Included:

• 4340 billet steel crankshaft with 71mm stroke (BC5951)
• Brian Crower PRO625+ connecting rods with 19mm wrist pin
• Custom CP pistons with choice of bore and compression ratio
• Complete hardware kit for installation

Key Features:

• Premium 4340 billet crankshaft construction for maximum strength and durability
• PRO625+ connecting rods feature upgraded 625+ fasteners for enhanced reliability at high RPM
• Custom piston options allow tuning for specific power goals and fuel requirements
• Precision CNC machined components manufactured to exacting tolerances
• Dyno tested and proven for reliable performance gains

Important Note: This stroker kit requires the Sidewinder oil pump and sprocket (Brian Crower part number BC8805, sold separately) for proper installation and operation.

Brian Crower specializes in high-quality performance engine components for powersports applications, combining race-proven engineering with affordable pricing. All BC stroker kits are designed to work together as complete packages to deliver increased horsepower, torque, and engine reliability.