Here is a nice trio of variator slide guides for 50cc, 125cc, and 150cc GY6 scooter & go-kart engines from NCY Variator guides (or ‘sliders’) are the spacers between your variator pulley and the back plateDescription Here is a nice trio of variator slide guides for 50cc, 125cc, and 150cc GY6 scooter & go-kart engines from NCY.Variator guides (or ‘sliders’) are the spacers between your variator pulley and the back plate. Regular service of these guides is often overlooked and may cause excess noise and a loss of performance and acceleration.Sold as a set of three as shown.Let Monster Scooter Parts be your source for NCY scooter parts and accessories. ? WARNING California Residents: Proposition 65 Warning