150cc Naraku Scooter Racing Compression Torque Spring +1500 rpm for GY6, Kymco, Honda Scooters
Current Naraku counterpressure springs with different alloying of the spring steel.
A necessary addition where engines have been tuned. RPM increases are given, to show the effect on the variator. A 1500 spring increases the variator ratio change point by 1500rpm.