Product Description OEM-style standard bore kits include a cast aluminum Cylinder Works cylinder, Vertex Piston and gaskets needed to restore horsepower and performance, as a competitive price point, compared to OEM options.
Cylinder Works 99-24 Yamaha YZ 250 250cc 72mm Big Bore Power Valve Kit - CW-PV-K02 MSRP: $394.95 Was: Now: $375.20 Add to Cart
Cylinder Works 99-24 Yamaha YZ 250 250cc Standard Bore Cylinder Head - CH2001-K01 MSRP: $262.95 Was: Now: $249.80 Add to Cart
Cylinder Works 99-23 Yamaha YZ 250 250cc Standard Bore Cylinder Kit - 20009-K01 MSRP: $842.95 Was: Now: $716.51 Add to Cart