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. ProX Piston Kits are a first class solution to replace the original piston in your Motorcycle, Scooter, Moped, ATV, Personal Watercraft, etc.
Coated for ultimate performance
Most of the ProX pistons come with a coating. Our OEM style Tin coated pistons assist the wear in process when you just started the bike. We have developed a new skirt coating that not only assists the wear in process, but also helps reducing friction after the wear in. The black coating is made from a delicate mix of materials and will increase performance.
Product specifications
| Attribute | Value |
|---|
| Additional Info | Reed cut-out, Cast Piston |
| Bore - Actual | 89.25 mm |
| Bore - Oversize | 0.25 mm |
| Bore - Standard | 89.00 mm |
| Boss Space In | 30.00 mm |
| Compression Height | 30.00 mm |
| Country of Origin | Japan |
| OEM Reference No | 13101-MAC-680 |
| Piston Head Type | Dome |
| Piston Pin Hole Diameter | 20.00 mm |
| Ring Locating Pin (E) | 19.00 mm |
| Ring Locating Pin (F) | 19.00 mm |
| Skirt Coating | Mos2 Skirt Coating |
| Text on Piston | PROX / HM50086 / JAPAN |
| Total Height | 87.00 mm |
