TAIDA SCOOTER PERFORMANCE BIG BORE CYLINDER & HEAD UPGRADE KIT *50mm* QMB139 *81cc/86cc*
Weight:3.4 kg
TD50mm
TAIDA 50cc QMB139 4-STROKE 50mm, RACING BIG BORE CYLINDER & HEAD KIT. KIT INCLUDES CYLINDER, PISTON, RINGS, PISTON PIN, CIR CLIPS, CYLINDER HEAD, HEAD GASKET, AND BASE GASKET. WHEN USED IN CONJUNCTION WITH A STOCK STROKE OF 41.4mm THE TOTAL DISPLACEMENT COMES OUT TO 81cc WHEN USED WITH A 44mm STROKER CRANK TOTAL DISPLACEMENT MEASURES 86cc UPGRADES TO 81cc CYLINDER BORE: 50mm CYLINDER SLEEVE OUTER DIAMETER: 54.4mm WRIST PIN DIAMETER: 13mm TOTAL PISTON HEIGHT: 36.3mm COMPRESSION HEIGHT (FROM CENTER OF WRIST PIN HOLE TO TOP EDGE OF PISTON): 20MM NON-EMISSIONS STYLE HEAD INTAKE VALVE: 23mm EXHAUST VALVE: 20mm INTAKE PORT DIAMETER: 20.8mm EXHAUST PORT DIAMETER: 18.7mm USES SHORT 64mm VALVE STEMS FITS MOST MODELS OF, JMSTAR, ROKETA, SUNL, TANK, PEACE, TAOTAO, GATOR AND MANY OTHERS *PLEASE LOOK AT PHOTOS PROVIDED* FITS MANY MODELS LIKE JONWAY, JMSTAR, ROKETA, SUNL, TANK, PEACE, TAOTAO, GATOR AND MANY OTHERS
