Description
The CP Carrillo M1084A forged piston kit is aimed at top tier Yamaha FX SHO builds that combine a 0.5mm oversize 86.5mm bore with a high 10.5 to 1 compression ratio. This setup raises displacement to about 1834cc and is intended for advanced turbo or supercharger applications running appropriate fuel and calibration. It is an excellent choice when the block needs a sizeable overbore and the goal is maximum power potential.
Each M1084A piston is part of the CPK1084A configuration and is designed to be used with the 5551 connecting rod, 866 2250 20CP3C wrist pin, 866X063XSWL locks, and CPN 3406 ring set. The forged construction features heavy duty ring lands, a strong crown, and skirt geometry tuned for high load stability. This allows the engine to tolerate aggressive boost and timing strategies used in serious performance and race builds.
- Fitment 2009 2013 Yamaha FX SHO 1.8L engines bored to 86.5mm 0.5mm over.
- Compression ratio 10.5 to 1, ideal for high output combinations with proper tuning and high octane fuel.
- Forged oversize pistons provide major strength and durability gains compared with stock parts.
- Works with 5551 rod, 866 2250 20CP3C pin, 866X063XSWL locks, and CPN 3406 rings for a forged bottom end package.
- Engineered to handle significant cylinder pressure, heat, and rpm in aggressive marine performance use.
- Targeted at competitive FX SHO racers and expert tuners building engines to handle serious boost.
For Yamaha FX SHO builders chasing the highest levels of performance and willing to support the setup with the right fuel and calibration, the CP Carrillo M1084A piston kit is a strong candidate. It provides the forged, oversize, high compression base needed for extreme power and long term durability.
