CG 125cc Piston Ring

Brand: Mortch Motor
Product Code: MICG125-1026

Product Viewed: 178

Availability: Pre-Order

Weight: 0.02kg

Packing Size: 7.00 x 7.00 x 1.00cm

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CG125 Piston Ring Set

🔧 Piston Ring Set · Compression Rings · Oil Ring · Engine Rebuild Part · CG125 Specific

Excellent Inexpensive Replacement Piston Rings · Includes Compression Rings & Oil Ring · For CG125 Engines

📋 Product Overview

This is the CG125 Piston Ring Set — an excellent inexpensive replacement piston ring kit. This set includes compression rings and oil control ring, making it an ideal choice for engine overhaul, piston ring replacement, or resolving oil burning issues.

Piston rings are critical sealing components in the engine combustion chamber, installed in the piston ring grooves. They are responsible for sealing the cylinder, controlling oil consumption, and transferring heat. Manufactured from high-quality alloy cast iron, these rings offer excellent wear resistance, consistent tension, and superior sealing performance. This is the perfect replacement when original piston rings suffer from wear, sticking, or loss of tension causing oil burning and power loss.

This product is available in two specifications: CG125 Type (1.20mm + 1.20mm + 2.50mm) and EG33 Type (1.00mm + 1.00mm + 1.50mm). Please select the correct specification based on your engine model and piston ring groove dimensions.

✨ Core Functions: Seal cylinder to prevent gas leakage · Control oil consumption · Transfer piston heat · Restore engine power · Affordable replacement choice

📐 Specifications

Product Name

Piston Ring Set

Compatible Engine

CG125 / 125cc Engine

📦 CG125 Type Piston Ring Dimensions:

Top Ring

1.20mm

Second Ring

1.20mm

Oil Ring

2.50mm

📦 EG33 Type Piston Ring Dimensions:

Top Ring

1.00mm

Second Ring

1.00mm

Oil Ring

1.50mm

📌 Specification Note: Please select the correct specification based on your engine's piston ring groove dimensions. The CG125 Type is the standard specification for most CG125 engines, while the EG33 Type is suitable for some early or specific engine models.

⚠️ Important: Specification Confirmation

This product is available in two specifications: CG125 Type (1.20 + 1.20 + 2.50mm) and EG33 Type (1.00 + 1.00 + 1.50mm). Before purchasing, measure your original piston ring groove widths or consult your engine service manual to select the correct specification. Using incorrect piston ring specifications will result in poor sealing, oil burning, or engine damage.

🔧 Compatibility

This piston ring set is compatible with the following engines and vehicles:

Engine Types: CG125 4-stroke engines, 125cc engines
Vehicle Types: Honda CG125, Chinese-made CG series motorcycles, dirt bikes, street bikes
Applications: Engine overhaul, oil burning repair, piston ring replacement, power restoration
Piston Diameter: Suitable for 56.5mm pistons (standard CG125 piston)

📌 Compatibility Note: This piston ring set is designed for CG125 series engines. Before purchasing, measure your original piston ring groove widths to confirm whether you need the CG125 Type (1.20/1.20/2.50mm) or EG33 Type (1.00/1.00/1.50mm).

🔧 Importance of Piston Rings

🔒 Sealing Function

The top and second compression rings seal the cylinder, preventing high-pressure combustion gases from escaping between the piston and cylinder wall, maintaining compression pressure and power output.

💧 Oil Control Function

The oil ring scrapes excess oil from the cylinder wall, leaving a uniform oil film while preventing oil from entering the combustion chamber and causing oil burning.

🌡️ Heat Transfer Function

Piston rings transfer heat absorbed by the piston crown to the cylinder wall, where it is dissipated by the cooling system, preventing piston overheating.

🛡️ Support Function

Prevents direct contact between the piston and cylinder wall, reducing friction and wear, extending engine life.

⚠️ Symptoms of Piston Ring Failure: Oil burning (blue smoke from exhaust), power loss, poor acceleration, increased fuel consumption, heavy carbon buildup on spark plug, low cylinder compression, engine noise. If these issues occur, inspect and replace the piston rings promptly.

✨ Product Features

High-Quality Alloy Cast Iron: Manufactured from premium-grade alloy cast iron with excellent wear resistance, corrosion resistance, and tension retention.
Precision Machining: Ring faces are precision-machined for optimal contact with cylinder walls and superior sealing performance.
Uniform Tension: Consistent ring tension ensures reliable sealing under all operating conditions.
Two Specifications Available: Offered in CG125 Type (1.20/1.20/2.50mm) and EG33 Type (1.00/1.00/1.50mm) to suit different engine variants.
Excellent Value: High quality at an affordable price — the ideal choice for engine overhaul.
Complete Set: Includes 2 compression rings and 1 oil ring — everything needed for a professional rebuild.

🔧 Installation Guide

1. Clean the piston ring grooves thoroughly before installation to remove carbon deposits and debris.
2. When installing piston rings, pay attention to orientation (top ring typically has markings facing up; second ring may have a chamfer orientation).
3. Stagger the ring gaps 120 degrees apart to prevent blow-by.
4. When installing the oil ring, ensure the expander and scraper rings are positioned correctly.
5. Apply a small amount of engine oil to the piston rings and cylinder wall before installation to prevent dry start-up.
6. Use a piston ring compressor tool to compress the rings when installing the piston into the cylinder to avoid damage.
7. After installation, manually rotate the crankshaft several times to confirm smooth piston movement without binding.
8. It is recommended to replace the piston and cylinder (depending on wear) for optimal sealing results.

⚠️ Important Notice: This product is the CG125 Piston Ring Set, available in two specifications: CG125 Type (Top Ring 1.20mm, Second Ring 1.20mm, Oil Ring 2.50mm) and EG33 Type (Top Ring 1.00mm, Second Ring 1.00mm, Oil Ring 1.50mm). Designed for CG125 series 125cc engines.
Spec Confirmation: Before purchasing, measure your original piston ring groove widths to confirm the correct specification. Using incorrect piston ring specifications will result in poor sealing, oil burning, or engine damage.
Installation Caution: Pay attention to ring gap staggering and orientation during installation. 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.