This high quality accessory is the secondary slider for 125cc and 150cc GY6 Engines from NCY NCY is well known in the competitive riding market as the brand to use when modifying your rideDescription This high quality accessory is the secondary slider for 125cc and 150cc GY6 Engines from NCY. NCY is well known in the competitive riding market as the brand to use when modifying your ride. Let Monster Scooter Parts be your first source for accessories and mods from NCY with our great secondary slider.Do you have a tuned engine that is not putting the power on the ground? NCY rear converters have aggressively angled slits to provide power where you need it and smooth transitions between belt positions with minimal hang up.1200-1034 ? WARNING California Residents: Proposition 65 Warning