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Cylinder Works

Cylinder Works 99-24 Yamaha YZ 250 250cc Standard Bore Cylinder 66.4mm

$645.95 $613.65 Save $32.30

SKU: C0BU 20009

In Stock
In Stock
Ships by Jun 17
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

This Cylinder Works Big Bore Cylinder Kit includes matching Vertex pistons for longevity, performance, and reduced engine noise. Features nickel silicon carbide cylinder sleeve and looks virtually identical to OEM cylinders. Kit includes cylinder, cylinder head, power valve kit, piston kit, top end gasket kit, and wrist pin bearing. Made in the USA.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandCylinder Works
Part NumberC0BU 20009

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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