The innovative and time served J.Costa EV03 high end variator kit provides increased acceleration and speed, this together with the quality of the kit will impress in every way. Much improved from the EV02 version, the patented variator provides a relatively easy way to optimize the driving performance. The actual engine output is not changed. This tuning variator uses the existing engine power which is optimally transferred to the transmission reducing losses, the innovative design offers a shorter transmission ratio increasing acceleration and also offers a bigger ratio at high revs increasing top end speed.

Made for street driving, providing safety and security with less consumption.

Fits the following models:

Honda Silverwing- 400cc.

Honda SW T400- 40cc.