Big bore and still not enough? Then we have the Naraku Racing 4-valve cylinder head with 66mm combustion chamber. More passage, reinforced valve springs and larger valves (22/25mm). 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). The cylinder head is suitable for the Naraku Big Bore cylinder NK600.76 with 66mm bore.
Scope of delivery as shown.
Scope of delivery as shown.
- Combustion chamber: 66mm
- Inlet valves: 25mm
- Exhaust valves: 22mm
