Naraku Cylinders’ Combo 52.4mm 94.9cc 2V w/Forged Piston (139QMB)
Description: High-Quality Naraku Cast-Iron Cylinder 52.4mm 94.9cc with Forged Aluminum Piston offer better durability and reduced friction for 139QMB 49/50cc + engines. The cylinder bore is 52.4mm. Naraku Cylinders' Combo 52.4mm 94.9cc 2V w/Forged Piston including the following parts Naraku 52.4mm (94.9cc) cylinder kit with forged piston and Naraku oversize 2V head 23/20. Naraku Cylinders' Combo 52.4mm 94.9cc 2V is suitable for all air-cooled 4 stroke 49-50cc Kymco engines (scooters), and most Chinese imported vehicles 49/50cc (scooters, quads, and buggies).
When used in conjunction with a stock stroke of 41.4mm the engine displacement comes out to 89.3cc! When used with a 44mm stroker crank, engine displacement = 94.9cc!
NOTE: Please, measure with a caliper QMB crankcase bore (opening) for 54.4mm cylinder outer diameter sleeve need minimum 54.5mm bore clearance or boring and machining are required.
100% Naraku Products – NO SUBSTITUTE.
Includes the following Cylinder, Base gasket, Piston, Rings, Piston pin, Circlips, Cylinder head, Head gasket, Exhaust gasket.
1. Includes Naraku Cylinder 52.4mm 2V, Piston + Rings, Gaskets (chain tensioner gasket, base gasket, steel head gasket), Wrist pin, and Circlips.
• 51.88mm Forged-Alumin Piston
• 52.4mm Piston Rings (installed)
• 41.3mm x 13mm Wrist Pin w/G-clips
• 52.4mm Cast-Iron Cylinder
• 54.4mm Outer Sleeve Diameter
• 53mm Cylinder Height (w/o sleeve)
• 70.3mm Overall Height (w/sleeve)
2. Includes Naraku Cylinder Head 52.4mm 2V NON-EGR, Valves Assembly.
• 64mm 2-Valve: 23mm Intake / 20mm Exhaust
• Factory Ported: 20.8mm Intake / 18.7mm Exhaust
• Valve Length: 64mm / Shaft Diameter: 5mm
• 6mm Intake Threads
• 6mm Exhaust Threads
• Fit 6mm Intake Studs
• Fit 6mm Exhaust Studs
• Fit 64mm Rocker Arm Assembly 2V
• Fit 50mm Stud Spacing /Diagonal 70.5mm
• Fit Cylinder 50mm to 52mm
• Fit Dowel Pin Set (8mm x 14mm)
• Fit QMB 49/50cc+
Supported Models: GY6 139QMB 49cc-50cc engines, Buddy50, Filly 50, Kymco, QLink, RoughHouse, SYM, TaoTao
Item Weight & Product Dimensions:
• 1.425 Pounds | 4.463" (L) x 4.156" (W) x 2.767" (H)
• 2.194 Pounds | 5.322" (L) x 5.290" (W) x 2.610" (H)
- Stock: 15
- Brand: Naraku
- Reward Points: 8
- Model: NK100.52
- Weight: 4.24lb
- Dimensions: 7.75in x 6.25in x 5.93in
- SKU: 137-4
- MPN: NK100.52