Features: ProX forged pistons are made from a specific aluminium alloy which lowers frictions anf maximises reliability. ProX 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 manufacturers.
This product would be ideal for Yamaha WR400F standard-size piston kit enthusiasts in 1998-2000 models.
