RB Max 150cc cylinder kit for Yamaha X-MAX, MT-125, WR125R/X & YZF-R125 125cc 4-stroke motorcycles with YI-3 engines.

Aluminium big bore cylinder with cast iron liner, a good upgrade with increased torque.

The standard cylinder head can be used although it is absolutely necessary to check and adjust the squish (cylinder head spacing).

It is required to adjust the carburation when fitting this cylinder kit (Malossi Force Master is recommended)

Bore: 57mm
Gudgeon Pin: 14mm

Included:
cylinder, piston kit & gasket set.

Please note: You will need to use the TNT branded timing chain tensioner we sell here.