Vertex pistons are made from cast aluminium (not forged) with an 18-20% silicone content which gives you a light but strong piston. Piston skirts are bisulphide coated for faster break-in time and increased piston life. All pistons are heat treated with T-5 hardening and tempering cycle. Race proven by Ricky Carmicheal and Pro Circuit
- Compression Ratio: 13.5:1
- Cylinder Diameter: 90 mm
- Displacement: 400 cc
Piston kit contains piston, piston rings, gudgeon pin and circlips.
400 DVX (04-08); DR-Z 400 (00-07); DR-Z 400 E (00-07); DR-Z 400 S (00-22); DR-Z 400 SM (05-10,13-22); LT-Z 400 (03-14);
KFX 400 (03-06); KLX 400 R (03-04); KLX 400 SR (03-04)