Cylinder and Head 61mm Alloy Big Bore Kit GY6 150cc

Description

Item Description

Alloy cylinder and head big bore kit for the GY6 125 &150cc engine. This performance kit may require some modifications to the engine case bore.

Compatible with the Honda base GY6 Engine & China Cloned GY6 152QMI, 157QMJ. (cannot install to P152QMI, nor P157QMJ Engine)

Kit Includes 61mm Aluminum Cylinder Head, 61mm Aluminum Cylinder Block, High-Performance Piston and Piston Rings, Wrist Pin, Wrist Pin Clips and Gaskets.

Specifications:
Cylinder diameter: 61mm
Outer Sleeve diameter: 64.95mm
Bolt Hole Spacing: 54mm (center to center)
Intake Valve Diameter: 28mm
Exhaust Valve Diameter: 23mm
Exhaust Port: 27mm

Note: This kit is not recommended for inexperienced installers. It is highly recommended that it’s installed by an experienced scooter or motorcycle mechanic. The valves may require adjusting and the timing must be properly set. Also in most cases, the engine case may need to be bored out to accommodate the larger diameter 64.95mm cylinder sleeve.

Compatible with the following GY6 125/150cc Engines models
KYMCO: GY6 125 and 150cc
MXer GY6 125 and 150cc
MXU GY6 125 and 150cc
TGB GY6 125 and 150cc
HONDA GY6 125 and 150cc
SYM GY6 125 and 150cc
VENTO GY6 125 and 150cc
Phantom R4i GY6 125 and 150cc
Strada RX150
Yamati GY6 125 and 150cc
Verucci GY6 125 and 150cc
Baccio GY6 125 and 150cc
Viva GY6 125 and 150cc
Matrix GY6 125 and 150cc
Wuzzi GY6 125 and 150cc
Lifan GY6 125 and 150cc
Clones GY6 125 and 150cc