Compression (Torque) Spring (GY6), 2500 rpm, RZR170 (race built)

This Approx 2500 RPM torque spring is a great upgrade from a Stock Spring, it was developed for a 230+ cc GY6 based race engines Stonebuilt Racing clutchs developed this spring directly with NCY. it has been used for 2 race seasons on Big Engine Race rzr 170s all over and now available to all! it does require an increase in the Roller weights.