Piston Assembly for 70cc Dirt Bikes ATVs 70 CC 70c Pit Bike Quad 4 Wheeler SSR Coolster Roketa SDG NST X-Treme Baja Taotao SunL JCL Coolster Kandi Supermach Tank Piston Assembly. Top Quality Guaranteed. Piston Assembly for 70cc Horizontal Engine Dirt Bikes, ATVs Piston Diameter : 47mm; Piston Height : 41.5mm; Piston Pin Diameter : 13mm Length : 37.8mm; Piston Ring Diameter : 49mm; Please check the pictures and specifications for compatibility before placing orders