Description
The CP Carrillo M1087 piston kit is the forged solution for Yamaha FX SHO engines that need a 0.25mm oversize bore to clean up worn or damaged cylinders while keeping an 8.6 to 1 turbo friendly compression ratio. With an 86.25mm bore, displacement increases slightly to about 1827cc, restoring proper cylinder geometry and improving ring seal. This is an ideal option when stock bores can no longer be reused, but the goal is still a reliable, boost ready build.
Each M1087 forged piston is designed to work with the CPK1087 configuration, pairing with the 5551 connecting rod, 866 2250 18CP3C wrist pin, 866X063XSWL locks, and CPN 3396 ring pack. Careful attention to skirt shape, crown thickness, and ring groove quality helps the engine maintain strong compression and stable operation even at elevated boost levels. The kit offers a significant durability upgrade over stock cast pistons in performance and racing environments.
- Fitment 2009 2013 Yamaha FX SHO 1.8L engines requiring an 86.25mm 0.25mm oversize bore.
- Compression ratio 8.6 to 1, ideal for turbo and supercharged applications that need controlled cylinder pressures.
- Forged oversize pistons restore proper wall clearance and strength in re machined blocks.
- Works with 5551 rod, 866 2250 18CP3C pin, 866X063XSWL locks, and CPN 3396 rings for a matched package.
- Improved ring seal and stability help reduce blow by, oil consumption, and power loss over many hours of hard use.
- Excellent choice for performance rebuilds that need both an overbore and a serious strength upgrade.
When an FX SHO engine requires a cleanup overbore and a forged bottom end capable of handling boost, the CP Carrillo M1087 piston kit delivers. It combines the right compression ratio with oversize forged construction to give your refreshed engine the durability and power potential it deserves.
