69mm Valve GY6 100cc Bore Cylinder Rebuild Kit,50mm Bore Upgrade, Racing CDI, Ignition Coil, Spark Plug & Clutch Spring for 49CC 50CC 139QMB Moped Scooter Engine
Product details
| Management number | 231482608 | Release Date | 2026/06/18 | List Price | US$30.00 | Model Number | 231482608 | ||
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| Category | |||||||||
- This Cylinder Rebuild Kit is fitment for GY6 49CC, 50CC, 139QMB engines in motorcycles, scooters, ATVs, and karts. It upgrades 50CC/60CC/80CC engines to 100CC, significantly enhancing RPM, power, and top speed. No EGR system required.
- Core Components Includes:50mm cylinder body kit,69mm valve cylinder head assembly,Camshaft and camshaft seat kit,Full gasket set,Oil pump and gears,Spring set, pure copper roller assembly,6-pin racing AC CDI, ignition coil, and 3-electrode spark plug etc.
- Valve materials:Exhaust valve use 53Cr21Mn9N94N high-strength steel，Intake valve use 40Cr10Si2Mo alloy steel.
- Automated machining + plasma surfacing technology for wear resistance, high-temperature strength, and airtight durability.
- Installation Tips:Ensure piston markings face upward during installation, with the 6mm small hole facing away from the engine.
| ASIN | B0BPY94N44 |
|---|---|
| Brand | GOIRTUTSS |
| Model | 1 |
| Exterior | Machined |
| Item Weight | 7.24 pounds |
| Manufacturer | GOIRTUTSS |
| Item model number | AMJX-MB2189 |
| Package Dimensions | 10.47 x 7.6 x 6.06 inches |
| Manufacturer Part Number | AMJX-MB2189 |
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