CG Main Shaft of Transmission

Brand: Mortch Motor
Product Code: MICG125-1058

Product Viewed: 171

Availability: Pre-Order

Weight: 0.76kg

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CG Transmission Main Shaft

⚙️ Main Shaft · Input Shaft · Transmission Shaft · CG Series Specific

Excellent Replacement for Original Main Shaft · For CG125, CG150, CG200 Engines · OEM Specification

📋 Product Overview

This is the CG Transmission Main Shaft — an excellent replacement for the motorcycle's original main shaft. This component is a core part of the transmission system, responsible for receiving power from the clutch and transmitting it to the countershaft through gear engagement to drive the rear wheel.

The transmission main shaft is installed inside the engine transmission, with one end connected to the clutch inner hub and the other end supported by bearings in the transmission case. Multiple gears are mounted on the main shaft, and different gear ratios are achieved by moving shift forks. Manufactured from high-quality alloy steel with precision machining and heat treatment, this shaft features accurate gear teeth, high strength, and excellent wear resistance. This is the perfect replacement when the original main shaft suffers from wear, bending, tooth damage, or bearing surface wear.

✨ Core Functions: Receive clutch power · Carry gear sets · Transmit power · Ensure smooth shifting · Quality replacement

📐 Specifications

Product Name

Main Shaft / Input Shaft

Compatible Engines

CG125 / CG150 / CG200

Material

High-Quality Alloy Steel

Surface Treatment

Heat Treated / Surface Hardened

Gear Count

5-Speed / 6-Speed (Model Dependent)

Mounting Location

Inside Transmission / Clutch Side

Compatible Vehicles

CG Series Motorcycles

Mounting Type

Direct OEM Replacement

Associated Components

Gears, Bearings, Shift Forks

⚙️ Importance of the Transmission Main Shaft

⚙️ Power Input

Receives power from the clutch as the input to the transmission system.

🔧 Carries Gears

Mounts multiple gear sets to achieve different gear ratios through engagement.

🔄 Power Transmission

Transmits engine power to the countershaft to drive the rear wheel.

🛡️ Shift Support

Provides a sliding surface for shift forks to ensure smooth and accurate gear changes.

⚠️ Symptoms of Main Shaft Failure: Difficult or sticky shifting, gear jumping, transmission noise (gear meshing noise), power interruption while riding, vibration from shaft bending, uneven power transmission from worn gears. If these issues occur, inspect and replace the transmission main shaft promptly.

🔧 Compatibility

This transmission main shaft is compatible with the following engines and vehicles:

Engine Types: CG125, CG150, CG200 4-stroke engines
Vehicle Types: Honda CG series, Chinese-made CG series motorcycles, dirt bikes, street bikes
Mounting Location: Inside transmission, connected to clutch
Applications: Transmission overhaul, shifting issue repair, noise repair, worn main shaft replacement

📌 Compatibility Note: This main shaft is specifically designed for CG series engines as a standard replacement for the original main shaft. It is recommended to replace related bearings and oil seals simultaneously for optimal transmission performance.

✨ Product Features

High-Quality Alloy Steel: Manufactured from high-strength alloy steel with forging and heat treatment for excellent strength and wear resistance.
Precision Machining: Shaft journals and gear teeth are precision-machined for accurate fit with gears and bearings.
Case-Hardened Teeth: Gear teeth are case-hardened for high hardness and exceptional wear resistance.
OEM Specification Standards: Manufactured to CG series original specifications for perfect fitment.
Dynamic Balanced: Balanced for smooth operation and reduced vibration and noise.
Essential Overhaul Component: The main shaft is a core component for transmission overhaul — this product is critical for restoring transmission performance.

🔧 Installation Guide

1. Ensure the transmission is removed from the engine and clean the transmission case before starting.
2. Remove the old main shaft, noting the installation order of gears and bearings.
3. Inspect the transmission case bearing seats for wear; repair or replace if necessary.
4. When installing the new main shaft, pay attention to the position and orientation of gears.
5. Use proper tools to install bearings, avoiding impact damage.
6. Install shift forks and gears, ensuring smooth shifting operation.
7. After installation, manually rotate the main shaft and check gear engagement in all gears.
8. It is recommended to replace main shaft bearings, oil seals, and the countershaft simultaneously for optimal transmission performance.
9. Transmission repair involves precision components — professional installation is strongly recommended.

⚠️ Important Notice: This product is the CG Transmission Main Shaft, designed for CG125, CG150, and CG200 4-stroke engines.
Spec Confirmation: Before purchasing, verify that your original transmission gear count matches this product to ensure compatibility.
Installation Caution: Main shaft installation involves precision components and requires specialized tools and skills. Pay attention to gear and bearing orientation during installation. It is recommended to replace related bearings and oil seals simultaneously. Professional installation is strongly recommended. Product images are for reference only; please refer to the actual product.

🔧 Compatibility Notice

Please verify that this part fits your specific vehicle model and year. Many vehicles share similar names but use different components depending on year or market region.
We strongly recommend cross-checking with your vehicle's owner's manual or contacting us for confirmation before placing your order.

📄 Product Disclaimer

Product images, measurements, and descriptions are for reference only. Slight variations in color or appearance may occur due to manufacturing batches or photography lighting—functional specifications remain identical to the ordered part.
Professional installation is mandatory. Mortch Motor assumes no liability for damages, injuries, or losses resulting from improper installation, misuse, unauthorized modification, or abnormal operation.

💰 Import Duties & Taxes

All listed prices EXCLUDE shipping costs, import duties, taxes, and customs clearance fees. These charges (if applicable) are determined and collected by your local customs authority and are solely the buyer's responsibility.
In case of return due to unpaid duties/taxes or refusal to clear customs, the buyer shall bear the original shipping cost, return shipping fees, and any associated administrative charges deducted from the refund.

📌 Order Confirmation: By completing your purchase, you acknowledge that you have read, understood, and agreed to all terms above. For any questions, please contact our support team prior to ordering.