NARAKU SCOOTER PERFORMANCE BIG BORE CYLINDER & HEAD KIT *52.4mm*
Weight:3.4 kg
137-4
NARAKU 50cc QMB139 4-STROKE 52.4mm, RACING BIG BORE CYLINDER AND 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 89.3CC! WHEN USED WITH A 44mm STROKER CRANK TOTAL DISPLACEMENT MEASURES 94.9cc! UPGRADES TO 89.3cc CYLINDER BORE: 52.4mm 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
