The Honda PCX / Forza / ADV150 / SH Forums

Are these interchangeable with the spring for the ADV 150"s? IE..same tension/spring rates? Trying to locate a spring which is has LESS tension/spring rate. What all can be done to reduce the rpms of the motor? The 21Gram rollers were resulted in a couple of mph increase over the stock 19.8g.

thanks!