Bore Cylinder Kit for Yamaha Dirtbike

Bore Cylinder Kit for Dirtbike by Cylinder Works

This Cylinder Works Bore Kit is the perfect solution for your motocross. Easy to install, it screws directly without the need for new plating. Choose from three options: Standard Bore, Standard Bore Hi-Compression or Big Bore, and enjoy the superior performance of matching Vertex pistons, ensuring durability and engine silence.

FEATURES

• Ready-to-install, direct bolt-on cylinders require no re-plating and look virtually identical to the OEM cylinders
• Three kit options to choose from: Standard Bore, Standard Bore Hi-Compression and Big Bore
• Cylinder kits include matched Vertex pistons to ensure longevity, performance and reduced engine noise
• Nickel Silicon Carbide plated for long life
• Kits come complete with gaskets, cylinder, piston, rings, pin and clips

Compatibility 

20002 (cylinder only)

• Yamaha WR250F 01-04
• Yamaha WR250F 05-13
• Yamaha YZ250F 01-04
• Yamaha YZ250F 05-07
• Yamaha YZ250F 08-13

20002-K01HC (High-Compression)

• Yamaha WR250F 01-04
• Yamaha WR250F 05-13
• Yamaha YZ250F 01-04
• Yamaha YZ250F 05-07

21002-K01 (Big Bore/+3mm/269cc)

• Yamaha WR250F 01-04
• Yamaha WR250F 05-13
• Yamaha YZ250F 01-04
• Yamaha YZ250F 05-07
• Yamaha YZ250F 08-13

20010-K01 

• Yamaha WR250F 15-17
• Yamaha YZ250F 14-18
• Yamaha YZ250FX 15-19

CW20013K01

• Yamaha WR250F 20-23
• Yamaha YZ250F 19-23
• Yamaha YZ250FX 20-23

CW20013 (cylinder only)

• Yamaha WR250F 20-23
• Yamaha YZ250F 19-23
• Yamaha YZ250FX 20-23

CW21013K01 (Big Bore/+3mm/270cc)

• Yamaha WR250F 20-23
• Yamaha YZ250F 19-23
• Yamaha YZ250FX 20-23

20009 (cylinder only)

• Yamaha YZ250 99-23

20009-K02

• Yamaha YZ250 99-23

20001 (cylinder only)

• Yamaha YZ450F 03-05

20003 (cylinder only)

• Yamaha YZ450F 06-09
• Yamaha WR450F 07-15

20003-K01

• Yamaha YZ450F 06-09
• Yamaha WR450F 07-15

20005 (cylinder only)

• Yamaha YZ450F 10-13
• Yamaha YZ450F 14-17
• Yamaha YZ450FX 16-18

20005-K02

• Yamaha YZ450F 14-17
• Yamaha YZ450FX 16-18

CW20014 (cylinder only)

• Yamaha YZ450F 20-22
• Yamaha WR450F 21-23
• Yamaha YZ450FX 21-22