Large Bore 50cc or Small Bore 70cc Cylinder Head

Description

New, in the package! Genuine 2FastMoto 50cc Large Bore Cylinder Head / 70cc Small Bore Cylinder Head

Yes, this head can be used on either a 50cc or 70cc engine. But you must know what type of piston you are using, to know whether or not this head will work on our 50cc or 70cc engine, here's what you need to do. 

If you have a 50cc engine: 

Honda made 2 different 50cc Cylinder heads. Compare the Combustion Chamber Size shown below, to your current head. This head will only work with DOMED pistons. If you have a FLAT TOP piston, then you will need our SMALL BORE 50cc head, found in our store by clicking on the correct link below. 

If you have a 70cc engine: 

Honda made 2 different 70cc Cylinder heads. Compare the Combustion Chamber Size shown below, to your current head. This head will only work with FLAT TOP pistons. If you have a DOMED piston, then you will need our LARGE BORE 70cc head. We only offer that head on our website, as occasionally you need to make small modifications to the head, to install it correctly. 

Includes everything pictured above

NOTE: The head you receive may look slightly different than what is shown or may look slightly different than your existing head. Numerous variations were produced by Honda over the years, but rest assured that the head will bolt on and perform like new !

 

CLICK HERE TO PURCHASE A 50CC SMALL BORE CYLINDER HEAD

CLICK HERE TO SEE ALL OF THE CYLINDER HEAD PARTS WE OFFER IN OUR EBAY STORE!

Item Specs
Combustion Chamber Outer Bore Size 47mm
Inner Bore Size 39mm
Intake Valve Outside Diameter 23mm / Length 66mm
Exhaust Valve Outside Diameter 20mm / Length 66mm


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