Uploaded February 2025 | Updated September 2026, 2 days ago

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We're jumping right into the good stuff with our YZ 250x build.
The Cylinder Works Big Bore Kit is something we're looking forward to testing. Follow along as we go through the install process and make some observations about issues other riders and builders have encountered.

Building your YZ? Check out the parts from the video here:
Cylinder Works Big Bore Kit: slavensracing.com/shop/big-bore-cylinder-kit-for-yamaha-by-cylinder-works/?utm_source=Youtube&utm_medium=Description&utm_campaign=Cylinder-Works

V-Force 4X Reeds: slavensracing.com/shop/v-force-4x-reed-valve-by-moto-tassinari/?utm_source=Youtube&utm_medium=Description&utm_campaign=V-Force

Thread Locker by Stuck Nutz: slavensracing.com/shop/threadlocker-by-stuck-nutz/?utm_source=Youtube&utm_medium=Description&utm_campaign=Stuck-Nutz