Description

Ruizheng Racing YFZ350 Crankshaft – 4mm Stroker Crank for Yamaha Banshee 350 / RD350 YPVS – 64mm Stroke Performance Upgrade

Upgrade your Yamaha Banshee 350 or RD350 YPVS with the Ruizheng Racing YFZ350 Crankshaft, engineered for riders who demand maximum performance, torque, and reliability. Featuring a +4mm stroker design and 64mm total stroke length, this crankshaft is the ideal foundation for high-horsepower two-stroke builds.

Built for Performance: YFZ350 Crankshaft for Yamaha Banshee / RD350 YPVS

The Ruizheng Racing 4mm stroker crankshaft is precision-manufactured to provide a significant increase in engine displacement, resulting in more torque and power across the entire RPM range. Compatible with Yamaha Banshee 350 YFZ350 (1987–2006) and the RD350 YPVS, this crankshaft offers a plug-and-play solution for serious builders and tuners alike.

Whether you’re racing on the dunes, hitting the trails, or tuning for street power, our YFZ350 Crankshaft delivers the strength, reliability, and performance you need.

YFZ350 Crankshaft – Key Specifications

• Application: Yamaha Banshee 350 (YFZ350), RD350 YPVS

• Stroke: 64mm (4mm stroker over stock)

• Fitment: Direct replacement for OEM crankshaft; compatible with +4mm stroker pistons and long rod cylinders

• Material: Forged, heat-treated steel for superior fatigue resistance

• Rod Type: Hot Rods-style connecting rods

• Balancing: Dynamically balanced for smooth high-RPM operation

• Brand: Ruizheng Racing – trusted globally by engine builders and racers

  Why Choose a 4mm Stroker YFZ350 Crankshaft?

  A 4mm stroker crankshaft increases the travel of the piston, effectively boosting your engine’s displacement without needing to bore out the cylinder. This translates to:

  • Higher torque output

  • Faster throttle response

  • Stronger mid-range acceleration

  • More top-end power

  When paired with the right piston and cylinder kit, the Ruizheng Racing YFZ350 Crankshaft transforms your two-stroke engine into a race-ready machine. It’s perfect for builds ranging from aggressive trail riders to full drag setups.

  Precision Craftsmanship Backed by Experience

  Every Ruizheng Racing crankshaft is manufactured using CNC machining and undergoes multi-stage heat treatment for increased tensile strength. The crank pins are hardened, polished, and precision-ground to ensure perfect bearing fitment and smooth rotation. Our internal quality control system ensures that each crankshaft maintains exacting tolerances for long-lasting performance, even under extreme conditions.

  With over a decade of experience in high-performance engine components, Ruizheng Racing is a brand you can trust.

  🔗 Learn more about our story and manufacturing philosophy

  Custom Services Available for Distributors and Workshops

  In addition to premium crankshafts, we offer value-added services for wholesalers, shops, and private-label brands:

  🔩 Laser Marking / Branding Service

  Want to build your own brand? We provide fiber laser engraving directly on the crankshaft surface. Showcase your logo on your performance parts with professional, long-lasting precision.

  📦 Packaging Design & OEM Box Customization

  We help you stand out with custom packaging that reflects your brand’s image. Our design team works with you to develop box artwork and OEM packaging solutions that meet market standards and elevate perceived value.

  Join the Ruizheng Racing Community

  We don’t just sell crankshafts—we live and breathe performance. Join thousands of racers and mechanics around the world who trust Ruizheng Racing.

  • 🔗 Facebook

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  • 🔗 YouTube

  Tag us in your build photos and let us share your success!