u/LazyVeterinarian7712

Bought a Derbi Predator Air cooled with a morini engine and it barley pulls until 20km/h. There is a tecnigas pipe on it, also a mixture of 4.5g and 8g rollers.

I wanna keep it road legal in Sweden so top speed should max be 55-60 km/h

What kind of cvt spring fits? Current spring is 45 mm wide.