Cylinder Kit w/Head, Naraku 52mm Big Bore 90cc for 50cc 4-Stroke 139QMB Scooters

52mm Naraku 90cc Big Bore Cylinder Kit w/Head for 50cc 4-Stroke 139QMB Scooters


SPECIFICATIONS:

• 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

COMPATIBILITY:

• Amigo - 50cc 4-Stroke Scooters
• Apollo - 50cc 4-Stroke Scooters
• Baotian - 50cc 4-Stroke Scooters
• Baron - 50cc 4-Stroke Scooters
• Bintelli - 50cc 4-Stroke Scooters
• BMS - 50cc 4-Stroke Scooters
• Coolster - 50cc 4-Stroke Scooters
• CSC - 50cc 4-Stroke Scooters
• Diamo - 50cc 4-Stroke Scooters
• Flyscooter - 50cc 4-Stroke Scooters
• Ice Bear - 50cc 4-Stroke Scooters
• Italica - 50cc 4-Stroke Scooters
• JCL - 50cc 4-Stroke Scooters
• Jonway - 50cc 4-Stroke Scooters
• Kandi - 50cc 4-Stroke Scooters
• Kinroad - 50cc 4-Stroke Scooters
• KMD - 50cc 4-Stroke Scooters
• Kymco - 50cc 4-Stroke Scooters
• Lance - 50cc 4-Stroke Scooters
• Leike - 50cc 4-Stroke Scooters
• Linhai - 50cc 4-Stroke Scooters
• Longbo - 50cc 4-Stroke Scooters
• Motobravo - 50cc 4-Stroke Scooters
• Motofino - 50cc 4-Stroke Scooters
• Motorino - 50cc 4-Stroke Scooters
• NST - 50cc 4-Stroke Scooters
• Peace - 50cc 4-Stroke Scooters
• Puma Cycles - 50cc 4-Stroke Scooters
• Redstreak - 50cc 4-Stroke Scooters
• Roketa - 50cc 4-Stroke Scooters
• Scootstar - 50cc 4-Stroke Scooters
• Schwinn - 50cc 4-Stroke Scooters
• SSR - 50cc 4-Stroke Scooters
• SUNL - 50cc 4-Stroke Scooters
• Supermach - 50cc 4-Stroke Scooters
• SYM - 50cc 4-Stroke Scooters
• Tank Sports - 50cc 4-Stroke Scooters
• TaoTao - 50cc 4-Stroke Scooters
• Trailmaster - 50cc 4-Stroke Scooters
• Veloz - 50cc 4-Stroke Scooters
• Verucci - 50cc 4-Stroke Scooters
• Vitacci - 50cc 4-Stroke Scooters
• Viva - 50cc 4-Stroke Scooters
• Wolf - 50cc 4-Stroke Scooters
• Xingyue - 50cc 4-Stroke Scooters
• ZNEN - 50cc 4-Stroke Scooters

Naraku 50cc QMB139 4-stroke 52.4mm, Racing Big Bore Cylinder and Head Kit. Kit includes cylinder, piston, rings, piston pin, circlips, 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!


**MADE IN TAIWAN**


**NOTE: Electrical, High Performance, Aftermarket items are non-returnable so please check photos and specifications before ordering.


Please see our Warranty and Returns Policy