Naraku Maxi Speed Variator Kit for GY6 125 and 150cc engines.The Naraku Maxi Speed Variator Kit includes a variator, variator plate, slides, machined drive face and a set of 18x14 weights in 10.3 grams.Please see our Warranty & Returns Policy. Outer Diameter: 115mm fits 15mm Tail Shaft Includes 10.3g Weights