Compatible with:
Suitable for Yamaha Jog / Minarelli / Yamaha Clone
Suitable for Yamaha Jonway / Jmstar / Roketa / Sunl

Specifications
Type: Cylinder Big Bore Kit
Material: Metal
Displacement: 70cc
Master Cylinder Size: 110x95x80mm / 4.33″x3.74″x3.15″
Cylinder Head Size: 100x90x35mm / 3.94″x3.54″x1.38″
Piston Size: 48x47mm / 1.89″x1.85″
Wrist Pin Size: 38x10mm / 1.50″x0.39″

Package include:
1 Kit Cylinder Big Bore (as picture show)

Description:
70cc 2-stroke big bore kit for Chinese scooters.
This kit has a 47mm cylinder bore and 10mm wrist pin, includes wrist pin bearing.
47mm Big Bore Head Kit for 50cc 2-stroke 40QMB, E40QMB, 1E40QMB and 1PE40QMB Minarelli engines to increase drive power.

Feature:
The kit includes a piston, ring, pin, fixture, and top washer kit (as shown in the figure).
Cast pistons have additional strength with ultra-high silicon content.
The piston skirt is coated with molybdenum polytetrafluoroethylene to minimize resistance/wear and extend service life.
The piston dome has undergone anodizing treatment, providing excellent heat resistance and longer service life.
The gasket is made of high-performance materials to improve durability and provide higher reliability.
All components in the kit are bolted and can be easily installed.

Compatible Vehicles