CG Cam Shaft

Brand: Mortch Motor
Product Code: MICG125-1021

Product Viewed: 32

Availability: Pre-Order

Weight: 0.13kg

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¥6.60

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CG Rocker Arm Shaft · Rocker Pin

🔧 Rocker Arm Shaft · Rocker Pin · CG125/CG150 Engine · Valve Train Component

For CG125 · CG150 4-Stroke Engines · Rocker Arm Mounting Component

📋 Product Overview

This is the CG Rocker Arm Shaft (Rocker Pin), a high-quality, cost-effective replacement for the valve train in CG125 and CG150 4-stroke engines. Specifically designed for CG series engines, this component is suitable for motorcycles, ATVs, and various other vehicles, making it the ideal choice for engine repairs or rocker arm system restoration.

The rocker arm shaft (also known as rocker pin) is a critical component for mounting and supporting the valve rocker arms, providing a pivot point for the rocker arms to swing smoothly and transfer camshaft motion to the valves. Manufactured from high-quality alloy steel with precision machining and heat treatment, this shaft offers excellent wear resistance and fatigue strength, ensuring smooth rocker arm motion and accurate valve operation.

✨ Core Functions: Mount and support valve rocker arms · Provide rocker arm pivot point · Ensure accurate valve operation · Withstand impact loads from rocker arms

🔧 Technical Information

📌 Rocker Arm Shaft Function

CG series engines use a pushrod valve train. The rocker arm shaft is installed in the cylinder head to secure the valve rocker arms. The rocker arms pivot around the shaft, converting pushrod motion into valve opening and closing motion.

📌 Importance

The precision of the rocker arm shaft directly affects valve clearance stability and engine smoothness. Worn rocker arm shafts can cause unstable valve clearance, engine noise, and power loss.

📐 Specifications

Displacement

125cc / 150cc

Engine Models

CG125 · CG150

Material

High-Quality Alloy Steel

Surface Finish

Precision Ground · Carburized & Hardened

Mounting Location

Inside Cylinder Head · Rocker Chamber

Associated Parts

Valve Rocker Arms · Rocker Springs · Mounting Bolts

Diameter

Standard CG Spec

Length

Standard CG Spec

⚠️ Rocker Arm Shaft Failure Symptoms

💨 Common Symptoms

• Unusual engine noise (rhythmic metallic tapping or clicking)
• Valve clearance cannot be adjusted consistently
• Loss of power, poor acceleration
• Abnormal wear between rocker arms and camshaft
• Increased oil consumption (poor lubrication from worn shaft)
• Unstable idle

🔍 Possible Causes

• Wear from prolonged use
• Abnormal wear due to poor lubrication
• Deformed or bent rocker arm shaft
• Loose mounting bolts causing shaft movement
• Material fatigue or improper heat treatment causing fracture

⚠️ Important Note: Worn or damaged rocker arm shafts can cause unstable valve clearance, affecting valve timing. In severe cases, it may lead to rocker arm dislodgement, valve-to-piston collision, and serious engine damage. If you notice abnormalities, inspect and replace promptly.

🏍️ Compatible Vehicles

This rocker arm shaft fits vehicles equipped with CG125 and CG150 4-stroke engines, including but not limited to:

CG125 Motorcycles

CG150 Motorcycles

Honda CG Series

ATVs / Quad Bikes

Trikes / Three-Wheelers

💡 Compatibility Note: This rocker arm shaft is suitable for CG125 and CG150 engines. During installation, it is recommended to inspect the condition of the valve rocker arms and rocker springs, and replace them if necessary.

✨ Product Features

High-Quality Alloy Steel: Manufactured from premium alloy steel for high strength and excellent wear resistance.
Precision Machining: Outer diameter precision-ground for high surface finish and accurate fit with rocker arm bushings.
Heat Treatment: Precision heat treatment process improves surface hardness and fatigue resistance, extending service life.
Accurate Dimensions: Manufactured to exact OEM specifications for proper fitment.
OEM Specification: Made to 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.

🔧 Installation Guide

1. Remove the cylinder head cover to access the rocker chamber.
2. Remove the rocker arm shaft mounting bolts or clamp plates.
3. Remove the old rocker arm shaft, noting the installation order of rocker arms and springs.
4. Clean the rocker arm shaft mounting holes and rocker arm bushings, and inspect for wear.
5. Apply a small amount of engine oil to the rocker arm shaft surface for lubrication.
6. Install the rocker arms and springs onto the rocker arm shaft in the correct order.
7. Insert the rocker arm shaft into the mounting holes, ensuring proper positioning.
8. Install the mounting bolts or clamp plates and tighten to specified torque.
9. Adjust valve clearance to specification (Intake: 0.05-0.08mm, Exhaust: 0.08-0.12mm).
10. Reinstall the cylinder head cover, start the engine, and check for unusual noise.
Important Note: Pay attention to the orientation of rocker arms and springs during installation to ensure proper contact with the camshaft and valve stems. Professional installation is strongly recommended.

⚠️ Important Notice: This is the CG Rocker Arm Shaft (Rocker Pin), designed for CG125 and CG150 4-stroke engines.
Spec Confirmation: Before purchasing, verify your engine model to ensure compatibility.
Installation Note: Pay attention to the installation order and orientation of rocker arms and springs. Valve clearance must be readjusted after installation. Professional installation is strongly recommended.
Recommended Parts: When replacing the rocker arm shaft, it is recommended to inspect the valve rocker arms, rocker springs, and valve oil seals for wear, and replace them if necessary. Product images are for reference only; actual product may vary.

🔧 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.