• Vertex Piston Kits (Sold each). Yamaha RD350/400/RZ350/RD350LC/RD350YPVS (all years). Piston kits include piston, rings, pin and clips. Vertex pistons are manufactured in Italy and are designed to meet or exceed OEM specifications. Available sizes are 64.0mm, 64.25mm, 64.50mm, 64.75mm, 65.0mm, 65.5mm, 66.0mm. Note1: Pistons can be used in the models listed; however, use of these pistons in air cooled RD400 require modification of the piston skirt. Note2: Pistons can be used in the models listed; however, use of these pistons in the RD350 and LC350 require removal of the lower tab on the intake side of the piston. We can perform this services for you. You can purchase the Vertex piston modification services here on the site under the piston category. Choose piston size and click add to cart.
  • Vertex Piston Modification for Yamaha RD350/LC350. We perform the piston skirt modification and ship piston ready to install. This service is for the modification of one piston. Piston modification fees are non-refundable. Choose quantity and click add to cart.
  • Vertex Piston Modification for Yamaha RD400. We perform the piston skirt modification and ship piston ready to install. This service is for the modification of one piston. Piston modification fees are non-refundable. Choose quantity and click add to cart.