Brian Crower Yamaha YXZ Sidewinder 71mm Stroker Kit - BC0958 (ProH625+ Rods)

Key Features & Specs:

• Brand: Brian Crower
• Part Number: BC0958
• Engine Platform: Yamaha YXZ / Sidewinder
• Part Type: Stroker kit / rotating assembly
• Crankshaft Part Number: BC5951
• Crankshaft Material: 4340 billet
• Stroke: 71mm
• Connecting Rod Part Number: BC6952
• Connecting Rods: BC ProH625+
• Rod Pin Size: 19mm pin
• Rod Bolts: 625+ bolts
• Piston Part Number: BC7951
• Pistons: Custom pistons
• Piston Options: Specify bore and compression ratio
• Balance: Fully system balanced
• Required Upgrade: Requires Sidewinder oil pump/sprocket BC8805
• Bobweight Rod Spec: BC6952 rod with 19mm pin, 440g
• Bobweight Piston Spec: CP piston, 80mm bore, 272g
• Bobweight Pin Spec: CP 19mm OD, .220 in. wall pin, 85g
• Bobweight Ring Pack: CP ring pack, 17g
• Bobweight Bearings: ACL bearings, 24g
• Bobweight Locks: CP locks, 4g

Fitment:

• 2016+ Yamaha YXZ
• 2016+ Yamaha Sidewinder

The Brian Crower BC0958 stroker kit is built for 2016+ Yamaha YXZ and Sidewinder engine platforms requiring increased stroke, premium billet crankshaft strength, and custom piston flexibility. This rotating assembly includes a 4340 billet crankshaft with a 71mm stroke, BC ProH625+ connecting rods with 19mm pins, and custom pistons available in your selected bore size and compression ratio. Each crank is fully system balanced to Brian Crower’s specified bobweight combination for precise engine assembly. This kit requires the Sidewinder oil pump and sprocket, Brian Crower part number BC8805.