52.4mm Cylinder Gasket and Piston Ring Set for CRF125F/CRF125FB, 2014–2023
$150.00
In stock · Free Shipping
Hauertzx 50mm Big Bore Cylinder Rebuild Kit for 139QMB/139QMA Engines
$110.96
In stock
✓ Free Shipping
Complete 50mm cylinder rebuild kit with cylinder head, A9 camshaft, gaskets, oil pump, CDI, ignition coil, spark plug, clutch springs, and roller weights.
Price shown is the online purchase price. Free shipping · 30-day return policy
Product Description
This complete 50mm cylinder rebuild kit is designed for 139QMB and 139QMA 4-stroke engines used in 49cc and 50cc Chinese scooters, mopeds, ATVs, and go-karts. The package includes cylinder and head components, an A9 camshaft, camshaft seat kits, gaskets, oil pump and gear, spring sets, copper rollers, a 6-pin AC CDI, ignition coil, and a 3-electrode spark plug.
Product Specifications
Brandhauertzx
Manufacturer Part NumberHauertzx
Item Weight5.94 pounds
Modelhauertzx
Package Dimensions10.24 x 7.28 x 5.91 inches
Item model numberHauertzx
ExteriorBrushed
Explicit Manufacturer Part NumberHauertzx
Cylinder size50 mm
Piston size50 mm
Valve size69 mm/64 mm; 64 mm standard valve
Engine compatibility139QMB, 139QMA, and 147QMD 4-stroke engines
Clutch spring rating1500 RPM
CamshaftA9 camshaft
CDI6-pin racing AC CDI
Roller weight6.5 g copper rollers
Spark plug3-electrode racing spark plug
Included componentsCylinder body kits, cylinder head kits, camshaft seat kits, gasket kits, oil pump and gear, spring sets, copper roller sets, CDI, ignition coil, and spark plug
Motorcycle Compatibility
| Year | Make | Model | Power / Engine | Variant |
|---|---|---|---|---|
| — | Baja | SC50 | 49cc/50cc 139QMB or 139QMA 4-stroke | |
| — | Ice Bear | 50cc | 49cc/50cc 139QMB or 139QMA 4-stroke | |
| — | JMstar | 50cc | 49cc/50cc 139QMB or 139QMA 4-stroke | |
| — | Jonway | 50cc | 49cc/50cc 139QMB or 139QMA 4-stroke | |
| — | Lance | 50cc | 49cc/50cc 139QMB or 139QMA 4-stroke | |
| — | Panterra | 50cc | 49cc/50cc 139QMB or 139QMA 4-stroke | |
| — | Peace Sports | 50cc | 49cc/50cc 139QMB or 139QMA 4-stroke | |
| — | Piaggio | 50cc | 49cc/50cc 139QMB or 139QMA 4-stroke | |
| — | Roketa | 50cc | 49cc/50cc 139QMB or 139QMA 4-stroke | |
| — | SunL | 50cc | 49cc/50cc 139QMB or 139QMA 4-stroke | |
| — | Sunny | 50cc | 49cc/50cc 139QMB or 139QMA 4-stroke | |
| — | Tank | 50cc | 49cc/50cc 139QMB or 139QMA 4-stroke | |
| — | TaoTao | ATM50-01 | 49cc/50cc 139QMB or 139QMA 4-stroke | |
| — | TaoTao | Blade 50 | 49cc/50cc 139QMB or 139QMA 4-stroke | |
| — | TaoTao | Classic 50 | 49cc/50cc 139QMB or 139QMA 4-stroke | |
| — | TaoTao | CY50-A/CY50-B/CY50-T3 | 49cc/50cc 139QMB or 139QMA 4-stroke | |
| — | TaoTao | Euro 50 | 49cc/50cc 139QMB or 139QMA 4-stroke | |
| — | TaoTao | EVO 50 | 49cc/50cc 139QMB or 139QMA 4-stroke | |
| — | TaoTao | New Speed 50 | 49cc/50cc 139QMB or 139QMA 4-stroke | |
| — | TaoTao | Pony 50 | 49cc/50cc 139QMB or 139QMA 4-stroke | |
| — | TaoTao | Thunder 50 | 49cc/50cc 139QMB or 139QMA 4-stroke | |
| — | TaoTao | VIP Future Champion 50 | 49cc/50cc 139QMB or 139QMA 4-stroke | |
| — | Vitacci | 50cc | 49cc/50cc 139QMB or 139QMA 4-stroke | |
| — | Wildfir* | 50cc | 49cc/50cc 139QMB or 139QMA 4-stroke | |
| — | Wol* | RX50/Islander/V50/Rugby | 49cc/50cc 139QMB or 139QMA 4-stroke | |
| — | X-Pro | 50cc | 49cc/50cc 139QMB or 139QMA 4-stroke | |
| — | Zongshen | 50cc | 49cc/50cc 139QMB or 139QMA 4-stroke |
Always compare the part number, dimensions, specifications, and compatibility details with your original part before ordering.
