CG 125cc Cylinder Head without Valve

Brand: Mortch Motor
Product Code: MICG125-1003

Product Viewed: 23

Availability: Pre-Order

Weight: 2.40kg

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¥148.50

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CG125 Cylinder Head (without valves)

🏍️ Cylinder Head · Head Assembly · Engine Rebuild Part · CG125 Air Cooled Specific

For CG125 Air Cooled Aluminum Cylinder · OEM Specification · Valves & Valve Components Not Included

📋 Product Overview

This is the CG125 Cylinder Head (without valves) — a replacement cylinder head for the CG125 air cooled aluminum cylinder. Manufactured from high-quality cast aluminum to OEM specifications, this cylinder head is an ideal choice for engine overhaul or performance restoration.

The cylinder head is a core component of the engine, forming a sealed combustion chamber with the piston and cylinder, and housing the valve train components including valves, valve guides, valve seats, and camshaft. This cylinder head is made of cast aluminum alloy, offering excellent heat dissipation and structural strength. This is the perfect replacement when the original cylinder head suffers from cracks, warping, worn valve seats, or combustion chamber damage.

⚠️ Note: This product does NOT include valves, valve stem seals, valve springs, valve seats, or valve guides! Please purchase compatible valve components separately if needed.

✨ Core Functions: Form sealed combustion chamber · House valve train components · Dissipate combustion heat · Restore engine performance · Essential overhaul component

📐 Specifications

Product Name

Cylinder Head (CG125)

Compatible Engine

CG125 Air Cooled Engine

Material

Cast Aluminum Alloy

Cooling Type

Air Cooled

Compatible Cylinder

56.5mm Bore Aluminum Cylinder

Displacement

125cc

Mounting Type

Direct OEM Replacement

Kit Contents

Cylinder Head Only (Valve Components Not Included)

🔧 Compatibility

This cylinder head is compatible with the following engines and vehicles:

Engine Types: CG125 Air Cooled 4-stroke engines
Compatible Cylinder: 56.5mm bore aluminum cylinder
Vehicle Types: Honda CG125, Chinese-made CG series motorcycles, dirt bikes, street bikes
Applications: Engine overhaul, cylinder head crack repair, valve seat wear repair, combustion chamber damage repair

📌 Compatibility Note: This cylinder head is specifically designed for CG125 air cooled aluminum cylinders. Before installation, verify that your original cylinder is an aluminum type (not cast iron) with 56.5mm bore diameter.

🏍️ Importance of the Cylinder Head

🔥 Forms Combustion Chamber

Forms a sealed combustion space with the piston and cylinder, containing high temperature and pressure from combustion.

🔄 Houses Valve Train

Supports valves, valve guides, valve seats, camshaft, and other valve train components that control intake and exhaust.

🌬️ Guides Airflow

Intake and exhaust port design directly affects engine breathing efficiency and power output characteristics.

🌡️ Heat Dissipation

Cooling fins on the cylinder head help dissipate combustion heat, preventing engine overheating.

⚠️ Symptoms of Cylinder Head Failure: Valve leakage causing low compression, hard starting, power loss, rough idle, oil burning (valve seal failure), cylinder head noise, overheating due to poor cooling, cracks causing coolant/gas leaks. If these issues occur, inspect and replace the cylinder head promptly.

✨ Product Features

High-Quality Aluminum Casting: Made from premium cast aluminum alloy for excellent heat dissipation and structural strength.
Precision-Machined Combustion Chamber: Combustion chamber is precision-machined for optimal combustion efficiency and power output.
High-Precision Valve Guide Bores: Valve guide bores are precisely machined for smooth valve movement and proper sealing.
Optimized Port Design: Intake and exhaust ports are designed for minimal flow resistance, improving engine breathing efficiency.
OEM Specification Standards: Manufactured to CG125 original specifications for perfect fitment.
Essential Overhaul Component: Ideal choice for engine overhaul or cylinder head replacement.

🔧 Installation Guide

1. Ensure the engine is completely cooled and disconnect the negative battery terminal before starting.
2. When removing the old cylinder head, clean the cylinder block mating surface thoroughly to remove old gasket residue.
3. This product does NOT include valves, valve stem seals, or valve springs — purchase compatible valve components separately if needed.
4. Before installing valves, check valve-to-guide clearance and ream or replace guides if necessary.
5. Use a new cylinder head gasket to ensure proper sealing.
6. When installing the cylinder head, tighten cylinder head bolts in a diagonal pattern in multiple stages to the specified torque (approx. 20-25 N·m).
7. After installation, adjust valve clearance to specification (cold engine: intake 0.08-0.10mm, exhaust 0.10-0.12mm).
8. Start the engine and check for gas or oil leaks.

⚠️ Important Notice: This product is the CG125 Cylinder Head (without valves), designed for CG125 air cooled aluminum cylinder engines.
Spec Confirmation: Before purchasing, verify that your original cylinder is an aluminum type (not cast iron) with 56.5mm bore diameter.
Note: This product does NOT include valves, valve stem seals, valve springs, valve seats, or valve guides! Please purchase compatible valve components separately for installation.
Installation Caution: Cylinder head installation involves critical engine components. Professional installation is strongly recommended. Always use a new cylinder head gasket and tighten bolts to the specified torque. Proper valve clearance adjustment is required after installation. 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.