S-Stage Big Bore Kit 138cc with Camshaft XTZ125/YX125DX/YB125SP

Details:
・This S-Stage bore up kit allows for powerful output characteristics simply by bolting it onto the normal cylinder head.
・When installed with a sports camshaft, it maximizes the engine output of the S-Stage, achieving torqueful riding completely different from a normal engine.
・By using the normal cylinder head and installing the cylinder and piston, the displacement can be increased to 138cc.
・Bore diameter: 57mm / Stroke: 54mm (normal)
・Features an aluminum cylinder with an iron sleeve.
・The piston skirt is molybdenum coated to improve initial break-in with the cylinder. Compression ratio 11:6:1 Recommended parts for simultaneous installation
・The following mufflers are for the XTZ125. They cannot be installed on the YX125DX/YB125SP. Also, while the following XTZ125 mufflers are government-certified, this applies to normal engines.
・If installed simultaneously with Takegawa engine parts, it will not be certified. Please be aware.
・Muffler: Improves exhaust efficiency and increases output. It also has excellent compatibility with Takegawa S-Stage bore up kits.
Cone Oval Muffler (Slip-on / Part No. 04-02-0241)
Power Silent Oval Muffler (Slip-on / Part No. 04-02-0242) Compatible models: YAMAHA XTZ125/JYM125-9, YX125DX/JYM125-3G, YB125SP/JYM125-3F
*Images are for illustration purposes only. The design and specifications of the products shown are subject to change without notice. Please understand.