1998-2000 Yamaha WR400F / YZ400F ProX Piston Kit 12.5:1 01.2419.A

Excellent economic alternative when you are looking for an OEM quality replacement piston

Mainly manufactured in Japan by reputable Original Equipment Manufacturers to ProX exact specifications and high quality standards

Sleeved cylinder piston kits are available in standard size and a Wide range of oversizes

Plated cylinder piston kits come in standard size, as well as in A, B, C and D oversizes if available

ProX leads the industry in cast and forged pistons made specifically to replace OEM parts

Comes complete with pistons, piston rings, wrist pin and circlips