Seller notes

New Pro-X, 01.2419.A, std bore, 91.95 mm piston for Yamaha YZ400F and WR400F Fits 1998 and 1999 modelsThis is a 12:5:1 compression piston Pistons supplied in a kit package that includes rings, wrist pins and circlipsPro-X pistons are precision machined on the latest, state of the art CNC equipment. The same low-expansion, low-friction piston alloy is used as is used for all major Japanese engine manufactures. Pro-X piston kits are a first class solution to replace the original piston in your ATV...

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