Description
The CP Carrillo M9065 forged piston kit is designed for Sea Doo RXP 300 and other 1630 Ace engines that need a 0.25mm oversize bore and an 8.45 to 1 compression ratio. With a 100.25mm bore and 69.2mm stroke, displacement increases slightly to about 1638cc, while the boost friendly compression spec remains ideal for high output supercharged setups. This kit is particularly useful when the cylinders show wear or damage and must be bored and honed for proper cleanup.
Each M9065 piston is matched to rod 9086, 866 2250 20CP3C wrist pin, 866×063 SWL locks, and SWF 20064 3 ring set. The forged construction and robust design focus on ring land strength, crown integrity, and skirt stability, so the engine can withstand the elevated loads that come with performance tuning. The result is a bottom end that is ready for real power.
- Fitment Sea Doo RXP 300 and other 1630 Ace engines requiring a 100.25mm 0.25mm overbore.
- Compression ratio 8.45 to 1, a strong match for high boost supercharged applications with proper fuel.
- Forged oversize pistons restore cylinder geometry and significantly upgrade strength over stock.
- Designed to work with rod 9086, 866 2250 20CP3C pin, 866×063 SWL locks, and SWF 20064 3 ring pack.
- Improved ring control and crown strength support consistent compression and clean combustion.
- Ideal for serious Sea Doo 300 builds that combine an overbore with modern performance tuning.
When your Sea Doo 1630 Ace engine needs an overbore and you want forged pistons ready for big boost, the CP Carrillo M9065 kit is an excellent choice. It gives your rebuilt short block the durability and reliability required for aggressive riding and racing.
