CG Gearshift Drum, (uncycle)

CG Gearshift Drum · Shift Drum Assembly

🔧 Shift Drum · Gearshift Drum · Shift Drum Assembly · CG125/CG150 Engine · Transmission Component

For CG125 · CG150 4-Stroke Engines · Standard Quality · Cost-Effective Replacement

This is the CG Gearshift Drum (Shift Drum Assembly), a high-quality, cost-effective replacement for the transmission shift system in CG125 and CG150 4-stroke engines. Specifically designed for CG series engines, this shift drum is suitable for motorcycles, ATVs, and various other vehicles, making it the ideal choice for transmission repairs or shift performance restoration.

The shift drum (also known as gearshift drum) is the core component of the transmission shifting mechanism. It features precision-machined guide grooves that control the movement of shift forks as the drum rotates, enabling precise gear selection. Manufactured from high-quality alloy steel with precision machining and heat treatment, this shift drum offers excellent wear resistance and reliability, ensuring smooth shifting and accurate positioning.

This shift drum fits vehicles equipped with CG125 and CG150 4-stroke engines, including but not limited to:

• High-Quality Alloy Steel: Manufactured from premium alloy steel for high strength, excellent toughness, and superior wear resistance.
• Precision Guide Grooves: Precision-machined guide grooves for accurate shift travel and clear gear engagement.
• Carburized & Hardened: Surface carburized and hardened for high hardness, excellent wear resistance, and superior fatigue strength.
• OEM Specification: Manufactured to exact CG series engine factory specifications for perfect replacement of worn original components.
• Standard Quality: Standard quality manufacturing offers a cost-effective alternative to original components.
• Restores Shifting Performance: Replacing worn shift drum eliminates hard shifting and jumping out of gear, restoring clear and smooth shift feel.

🔧 Installation Guide

1. Remove the engine from the frame.
2. Split the engine crankcase to access the transmission assembly.
3. Remove the shift pawl, detent mechanism, and shift forks.
4. Remove the old shift drum and inspect guide groove wear.
5. Clean the transmission case and inspect shift forks and detent mechanism.
6. Install the new shift drum, ensuring the guide grooves correctly engage the shift forks.
7. Install the detent mechanism and shift pawl, and check for smooth shifting action.
8. Verify accurate gear positioning and smooth shift fork movement through all gears.
9. Assemble the engine crankcase and tighten case bolts to specified torque.
10. Reinstall the engine, add fresh engine oil, and start the engine to test shifting function.
Important Note: Transmission disassembly and assembly involve precision components. Pay attention to the correct alignment between the shift drum and shift forks during installation. Professional installation is strongly recommended.

⚠️ Important Notice: This is the CG Gearshift Drum (Shift Drum Assembly), designed for CG125 and CG150 4-stroke engines.
Spec Confirmation: Before purchasing, verify your engine model and transmission speed count (4 or 5 speeds) to ensure compatibility. Shift drums with different speed counts are not interchangeable — verify your original transmission speed count carefully.
Installation Note: Transmission disassembly and assembly involve critical engine components and require specialized tools and expertise. Professional installation is strongly recommended. Pay attention to the correct alignment between the shift drum and shift forks during installation.
Recommended Parts: When replacing the shift drum, it is recommended to inspect the shift forks, detent mechanism, and shift pawl for wear, and replace them if necessary to ensure overall shift system performance. Product images are for reference only; actual product may vary.