Automotive cylinder assembly designed to replace worn components and restore engine compression, WOOSTAR Cylinder Assembly. Confidence for weekend mechanics and scooter owners who want a reliable rebuild without hunting for separate parts. Will the included head, piston rings and gaskets match your GY6 or Taotao engine?
⚡ At a Glance
- • Fit and Compatibility: Engineered for GY6 72cc and 80cc, and Taotao 49cc and 50cc 4-stroke 139QMB/139QMA engines; explicitly not for 2004 XR80
- • Best for: DIY mechanics and scooter owners performing rebuilds or replacing a worn cylinder head
- • Not ideal for: Two-stroke engines or models outside the listed GY6/139QMB/139QMA range
A 47mm inner bore cylinder assembly supplied with head, piston ring kit and gaskets for specified GY6 and Taotao four-stroke engines. Precision measurements and a heat dissipation structure aim to restore compression and improve durability.
Accurate Fitment – With 47mm inner diameter and precise mounting hole spacing
The inner bore measures 47mm while mounting hole distances include 50mm and 63mm. Valve openings and mounting spacings are specified, for example intake valve diameter 19mm and intake valve mounting hole distance 45mm.
Correct dimensions simplify installation and help ensure a proper seal and compression, reducing the need for additional machining or adaptation.
Improved Cooling and Longevity – With a dedicated heat dissipation structure and corrosion-resistant materials
High-toughness, corrosion-resistant construction with a rustproof finish and a heat dissipation design are specified to manage operating temperatures. Thickness and component sizing, such as the 53mm overall thickness, contribute to structural rigidity.
Better thermal control reduces overheating risk and helps components last longer under typical urban and leisure riding conditions.
Rebuild-Ready Kit – With cylinder head, piston ring kit and gaskets included
The assembly includes the cylinder and head plus piston rings and gaskets as part of the kit, matching the core consumables needed for a top-end rebuild. Outer diameter of piston pin is specified at 13mm for compatibility checks.
Having the head, rings and gaskets together speeds up the repair, avoids sourcing separate parts and simplifies a one-job replacement.
✨ The 4 Key Reasons for WOOSTAR Cylinder Assembly
- Precise 47mm bore - Ensures accurate compression match for specified engines
- Heat dissipation design - Lowers operating temperature during prolonged runs
- Corrosion-resistant finish - Reduces risk of rust and extends component life
- Complete kit included - Cuts teardown time by supplying head, rings and gaskets
📋 Technical Details at a Glance
- Category: Automotive Parts and Accessories
- Application: GY6 72cc and 80cc, Taotao 49cc and 50cc 4-stroke 139QMB/139QMA engines
- Compatibility Note: Not a replacement for 2004 XR80 80cc engine
- Cylinder Inner Diameter: 47mm (1.9")
- Mounting Hole Distances: 50mm (2.0") and 63mm (2.5")
❓ Frequently Asked Questions
Q: Will this cylinder fit my GY6 125 or 150 engine?
A: Compatibility is specified for GY6 72cc and 80cc only; verify your engine type and measurements before ordering.
Q: Is this suitable for the 2004 XR80 80cc engine?
A: No, the listing specifically states it is not a replacement for the 2004 XR80 80cc engine.
Q: What measurements should I check before buying?
A: Confirm the inner bore of 47mm, mounting hole distances (50mm and 63mm), and valve mounting distances to ensure correct fit.
🏆 Our Verdict
Suitable for DIY mechanics and scooter owners who need a direct replacement for worn four-stroke cylinder components on specified GY6 and Taotao engines. The main advantage is a rebuild-ready assembly with precise bore and mounting measurements plus a heat-dissipating, corrosion-resistant construction. Easy fitment and included consumables make it a practical long-term repair choice.
