Cylinder Piston Top End Kit 90cc 2 Stroke Fits E-Ton Implus TXL90, Thunder AXL90, Sierra DXL90, Viper RXL90, RXL90R ATVs + Adly Polaris, Dinli, Alpha Sports and more. B=52mm Pin=12mm H=77mm : Get 2 It Parts, LLC offers SAME DAY SHIPPING. FAIR PRICING. SOUTH CAROLINA WAREHOUSING.