Description

The Yamaha YFZ 450 1.4mm stroker crankshaft assembly is designed to increase stroke and bring the engine to a true 450cc. This assembly is built for riders pushing harder loads, higher RPM, and longer ride time without sacrificing reliability.

Each unit is inspected to meet REV6 standards and backed by a 1-year parts warranty. It’s a smart upgrade when rebuilding the bottom end and looking for added performance without complicating the build.

THIS KIT INCLUDES

• Crankshaft assembly
• Crankshaft main bearings

LEARN MORE & GET SUPPORT

Review our full warranty coverage, explore build tips on the REV6 blog, find answers in our customer FAQ, or reach out to our team for build support.

FITMENT

Yamaha YFZ 450
2006–2013

TAKE ACTION
If you’re rebuilding your bottom end and want a proven upgrade, this stroker assembly is ready to work. Ships nationwide and built to hold up when the throttle stays pinned—add it to your cart and keep your build moving.

We proudly support our veterans with dedicated discounts.