Rear Sprocket #520 28th Fits E-Ton Impuls TXL90, Thunder AXL90, Sierra DXL90, Viper RXL70, RXL90R ATVs + Polaris, Alpha Sports, and more. Bolt Pattern=4x80mm (55mm to adjacent hole), Shaft=44mm

E-Ton Thunder 90, AXL-90, NXL-90 (Vin: 9EB,9EC/9ED)
E-Ton 90cc Sierra 90, DXL-90 (Vin: 9FA, 9FB)
E-Ton Impuls 90, TXL-90 (Vin: 9EA)
E-Ton Viper 70, RX4-70, 2007+ (Vin: 7KA)
E-Ton Viper 70, RXL-70, 2003-06 (Vin: 7EE)
E-Ton Viper 70, RXL-70, Silver Series 2007+ (Vin: 7KC)
E-Ton Viper 70M, RX4-70M, 2007+ (Vin: 7KB)
E-Ton Viper 90, RXL-90, 2003-06 (Vin: 9EE)
E-Ton Viper 90, RXL-9009 Silver Series 2009+ (Vin: 9KC)
E-Ton Viper 90, RXL-90R09, Silver Series 2009+ (Vin: 9KD)
E-Ton Viper 90R, RX4-90R, 2007+ (Vin: 9KA)
E-Ton Viper 90R, RXL-90R 2003-06 (Vin: 9EF)
Yamaha Raptor 90 2009-2013