High RPM clutch spring 7500 RPM GT220

DDM premium 7500 high stall high-RPM clutch spring for Zenoah and Chung Yang engines with 54mm clutch. Designed for RC use. This upgraded spring, custom-made of top-quality materials in the USA, offers god reliability and performance.
Stock spring engages at approx 6000 RPM; this spring is 20% stiffer for clutch engagement around 7500 RPM. The clutch will begin to touch at around 7000 rpm, with full engagement around 7500 rpm. Improve your off-the-line power with a higher engagement RPM!
Check also out our 9500 RPM spring