Compared to the 150cc cylinder kit from Naraku, the 177cc cylinder has of course been given an even larger bore which in turn can further optimise the performance of the engine. Since in cubic classes from 160cc on the original ECU...

To get the absolute maximum power out of Yamaha's YI-3 engines, this 62mm Ø Naraku cylinder head is indispensable. More passage, reinforced valve springs and larger valves (21/23mm) let every cylinder with 62-64mm bore breathe properly....

In addition to the 125cc standard cylinder kit, Airsal also offers a T6 racing version. The main difference of the T6 compared to the 125cc standard cylinder is the improved piston, which significantly changes the combustion chamber...

The Airsal YI-3 cylinder for the Yamaha 125cc engines is supposed to be a cheap alternative to the expensive original cylinder. Airsal not only uses a copy of the original cylinder, but also improves the coating, the piston and the...