CG 150cc Cylinder Head without Valve

Brand: Mortch Motor
Product Code: MICG150-1003

Product Viewed: 26

Availability: Pre-Order

Weight: 2.30kg

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¥158.40

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CG150 Cylinder Head without Valves

🏍️ Cylinder Head · Head Casting · CG150 Engine · Air-Cooled Engine Rebuild Part

For CG150 Air-Cooled Aluminum Cylinder · Without Valve Components · Requires Valve Assembly

📋 Product Overview

This is the CG150 Cylinder Head without Valves, a replacement cylinder head for the CG150 air-cooled aluminum cylinder. Specifically designed for CG series engines, this cylinder head is suitable for motorcycles, ATVs, and various other vehicles, making it the ideal choice for engine rebuilds or performance restoration.

The cylinder head is one of the core engine components, forming the combustion chamber together with the cylinder block and housing the valve train components including intake/exhaust valves, valve springs, and valve oil seals. This cylinder head is a bare casting without valve components, allowing experienced technicians to assemble using original or new valve components to meet specific repair needs.

✨ Core Functions: Form sealed combustion chamber · House valve train components · Efficient heat dissipation · Withstand high temperature and pressure · Restore engine performance

📦 Kit Contents

✅ Cylinder Head · Aluminum Alloy

✅ Valve Guides · Pre-Installed

✅ Valve Seats · Machined

💡 Note: This product is a bare cylinder head casting and does NOT include valves, valve springs, valve oil seals, or valve collets. For a complete cylinder head assembly, please select the version with valves. Valve components must be purchased separately or reused from original parts.

📐 Specifications

Displacement

150cc

Engine Type

CG150 Air-Cooled 4-Stroke

Head Material

Aluminum Alloy

Combustion Chamber

Hemispherical / Bath Tub

Valve Count

2 Valves (1 Intake, 1 Exhaust)

Cooling Type

Air-Cooled

Valve Guide ID

Standard CG150 Spec

Valve Seat Angle

45° Standard

Compatible Cylinder

CG150 Aluminum Cylinder

🏍️ Compatible Vehicles

This cylinder head fits vehicles equipped with CG150 air-cooled engines, including but not limited to:

CG150 Motorcycles

Honda CG Series

ATVs / Quad Bikes

Trikes / Three-Wheelers

Dirt Bikes

💡 Compatibility Note: This cylinder head is specifically designed for CG150 air-cooled aluminum cylinders and is suitable for CG150 engine rebuilds or performance restoration. Verify compatibility with your cylinder block before installation.

✨ Product Features

High-Quality Aluminum Alloy: Cylinder head cast from premium aluminum alloy for lightweight construction, high strength, and excellent heat dissipation.
Precision-Machined Combustion Chamber: Precision-machined combustion chamber ensures accurate volume and correct compression ratio.
Pre-Installed Valve Guides: Valve guides are pre-installed and precision-machined for accurate fit with valve stems.
Machined Valve Seats: Valve seats are pre-installed and machined to standard angles, ready for valve installation.
OEM Specification: Manufactured to exact CG150 engine factory specifications for a perfect replacement of worn components.
Flexible Assembly: Without valve components, allows use of original or new valve parts for custom assembly.

⚠️ Common Cylinder Head Issues

💨 Common Symptoms

• Loss of power, poor acceleration
• Coolant loss with no external leak (if applicable)
• Oil emulsification (milky appearance)
• White smoke from exhaust
• Engine overheating
• Low compression pressure
• Valve noise

🔍 Possible Causes

• Warped cylinder head surface
• Worn or burned valve seats
• Worn valve guides
• Excessive carbon buildup in combustion chamber
• Damaged spark plug threads
• Cracked cylinder head

⚠️ Important Note: Cylinder head issues typically manifest as power loss, oil burning, or low compression. If you experience these symptoms, inspect cylinder head flatness, valve seats, and valve guide condition. Replace the cylinder head if necessary.

🔧 Installation & Assembly Guide

Valve Assembly:
1. Install new valve oil seals using a dedicated installation sleeve, pressing them into place.
2. Insert valves into valve guides, being careful not to damage the valve stem or oil seal.
3. Install valve springs, paying attention to orientation (tightly wound end typically goes toward the cylinder head).
4. Install valve collets, ensuring they are fully seated in the valve stem grooves.
5. After assembly, check valve sealing (test by pouring kerosene or gasoline into intake/exhaust ports).

Cylinder Head Installation:
1. Ensure the engine is completely cooled and disconnect the negative battery terminal before starting.
2. Clean the cylinder block surface, removing old gasket residue and contaminants.
3. Place a new cylinder head gasket over the locating dowels on the cylinder block.
4. Position the cylinder head over the locating dowels, ensuring adequate valve-to-piston clearance.
5. Install cylinder head bolts and tighten in a diagonal pattern in 2-3 stages to specified torque (approx. 20-25 N·m).
6. Install pushrods, rocker arms, and other valve train components, then adjust valve clearance (Intake: 0.05-0.08mm, Exhaust: 0.08-0.12mm).
7. Reinstall related components, add fresh engine oil, and start the engine to check for leaks or abnormal noise.
Important Note: Cylinder head assembly and installation involve precision components. Professional installation is strongly recommended. Always use a new cylinder head gasket and tighten bolts to the specified torque in the correct sequence.

🔄 Break-In Recommendations

Proper break-in after installing a new cylinder head is essential for optimal valve-to-seat seating:

Break-In Period: Recommended 500-1000 km (300-600 miles).
RPM Control: Avoid prolonged high RPM operation during break-in; keep RPM below 70% of maximum.
Load Control: Avoid hard acceleration, heavy loads, and steep hill climbing during break-in.
Oil Change: Change oil after the first 300 km (180 miles), and again after the break-in period is complete.
Oil Quality: Use high-quality mineral oil during break-in; switch to synthetic oil after break-in.

⚠️ Important Note: Improper installation or break-in may cause poor valve sealing, cylinder scoring, or other serious engine damage. Professional installation is strongly recommended.

⚠️ Important Notice: This is the CG150 Cylinder Head without Valves, designed for CG150 air-cooled aluminum cylinders and compatible platform vehicles.
Spec Confirmation: Before purchasing, verify your engine model and cylinder head specifications to ensure compatibility.
Note: This product is a bare cylinder head casting and does NOT include valves, valve springs, valve oil seals, or valve collets. For a complete cylinder head assembly, please select the version with valves.
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 in the correct sequence.
Recommended Parts: When replacing the cylinder head, it is recommended to also replace the cylinder head gasket, valve oil seals, and related seals to ensure rebuild quality. 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.