Big bore and still not enough? Then we have the Naraku Racing 4-valve cylinder head with 62mm combustion chamber and lambda connection directly at the exhaust. More passage, reinforced valve springs and larger valves (21/23mm). Suitable for Yamaha X-Max, WR, YZF-R 125cc and other 125cc mopeds with YI-3 engine. The carburetor jetting or the injection system must be retuned (e.g. with Malossi Force Master). Newer models have the lambda sensor connection directly on the exhaust. This must be sealed on older models.
The cylinder head is suitable for the following big bore cylinders: Naraku NK600.74, Polini 166.0101, Malossi M.3114852 and other cylinders with 62-64mm bore.
Scope of delivery without shafts for the roller cam followers.
The cylinder head is suitable for the following big bore cylinders: Naraku NK600.74, Polini 166.0101, Malossi M.3114852 and other cylinders with 62-64mm bore.
Scope of delivery without shafts for the roller cam followers.
- Combustion chamber: 62mm
- Inlet valves: 23mm
- Exhaust valves: 21mm
- Temperature sensor thread M10
