Compatible models: XTZ125 (JYM125-9) YX125DX (JYM125-3G) YB125SP (JYM125-3F) By using a normal cylinder head and installing a cylinder and piston, the displacement can be increased to 138cc. Bore diameter: 57mm Stroke: 54mm (normal) ■Sports camshaft included Cylinder: Adopts an aluminum steel sleeve cylinder. Piston: The skirt of the piston is coated with molybdenum to improve initial integration into the cylinder. ■Compression ratio 11.6:1

This is an S stage bore up kit that allows you to obtain powerful output characteristics by bolting on the stock cylinder head. By installing it at the same time as the sports camshaft, you can maximize the engine output of the S stage and achieve torqueful driving that is completely different from the normal engine.


Manufacturer: ‎Special Parts Takegawa
Brand: ‎Special Parts Takegawa (TAKEGAWA)
Model name: ‎01-05-4485
Package size: ‎18.8 x 13.8 x 13.2 cm; 2.22 kg
Item model number: ‎01-05-4485
Item weight: ‎2.22 Kilograms