S-Stage Bore Up Kit (with Camshaft / 58.5mm / 155.6cc) for Cygnus X (XC125)

The S-Stage 156cc kit includes a bore-up piston for normal heads, a ceramic-plated bore-up cylinder, a sport camshaft (a no-camshaft option is available), and a gasket set.
You can choose from two types of pistons: a standard type and a high-compression type. You can also choose from two types of rocker arms: roller rocker arms and no rocker arms (using the standard ones). For the camshaft, there are three options: a sport camshaft, a camshaft with an auto decompression mechanism, or no camshaft.
Two types of pistons: a standard piston with a compression ratio of 11.4:1, and a high-compression piston with a compression ratio of 13.6:1.
The high-compression type further improves output in the mid- to high-speed range compared to the standard type.
Sport Camshaft: Improves the performance of the stock cylinder head and maximizes the performance of both the stock engine and the S-Stage 156cc kit.
The sport camshaft with auto decompression function allows for easy engine starting with a light kick force when using a kickstarter, and reduces the burden on the battery during engine startup when using an electric starter.
Roller Rocker Arm: By using rollers for the cam sliding part of the rocker arm, friction loss is reduced, allowing for smooth cam profile tracking from low to high RPMs.
Compared to standard rocker arms, output at high RPMs is improved.
Uses an all-aluminum ceramic-plated cylinder with excellent durability, airtightness, and heat dissipation.
Displacement: 156cc
Cylinder: φ58.5 (ceramic-plated cylinder)
Included Piston: Standard type
Included Camshaft: Sport
Included Rocker Arm: None (uses standard)
Compatible Vehicles:
: Cygnus X (SE12J)
: Cygnus X (FI) (SE44J・28S)
: Cygnus X (FI) (2013 model・1YP)
*For Cygnus X (FI) (2013 model・1YP), roller rocker arms and sport camshafts with auto decompression function cannot be installed.
*Images are for illustration purposes only. The design and specifications of the products displayed are subject to change without prior notice. Please be aware of this.