This is a product that we jointly developed with a Japanese OEM manufacturer of cylinders and pistons in Taiwan. We purposely set the displacement to 160cc to obtain high power without making major changes to the intake or exhaust system. The cylinder is made of cast iron for durability. Cast iron cylinder / aluminum piston / piston ring set / piston pin circlip x2 / head gasket / base gasket 2 types Displacement: 160 cc / Bore diameter: Φ 61.0 / Stroke: 54.8 mm

Can be installed on Majesty 125 with carburetor specification, but instruction manual is not included. Although it complies with FI specifications, we recommend installing an injection controller, etc. The items shown in the photo are all products, so please reuse or prepare new items such as chain tensioner gaskets. It is compatible with normal head/normal carb, but due to the increased displacement, it will be necessary to replace the main jet. When assembling, be sure to check that the piston head does not interfere with the head. In case of piston head interference, please make adjustments using the two types of gaskets included. Assembling requires a certain amount of knowledge and tools, and we will do our best to answer questions about assembly, but we cannot answer questions about setting due to individual differences. We recommend that you install it at a specialty store as it requires setting each part and changing plugs.


Product model number: ‎boa-13