Product Description
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
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Best big bore kit ever
Rings were gapped perfectly and wow just wow the acceleration and speed is like that of a 150 of course I did a performance exhaust and pwk carb as well
