ABOUT BDX PERFORMANCE BDXP is the leading USA technical expert in the Chinese vehicle off road market. Our engineers and technicians have helped thousands of people in the past twenty years keep their vehicles running. We have a full machine shop where we manufacture performance parts and engines to get maximum performance out of your vehicle. DESCRIPTION Red Spring 2000RPM Product Description: Extended Low Gear Reduces Belt Slippage Doesn't reduce top speed For GY6 engine This stiffer transmission spring keeps your CVT transmission in lower gear longer, allowing higher RPMs at lower speeds. This extends the amount of throttle you can apply at low speeds, and ultimately allowing more low-gear power to the wheels before the transmission begins to shift to higher gearing ratios. This is important for buggies where low-end power is what we're after. GUARANTEED FIT FOR THE FOLLOWING VEHICLES SPECIFICATIONS