CG Dowel Pin

Brand: Mortch Motor
Product Code: MICG125-1029

Product Viewed: 191

Availability: In Stock

Weight: 0.01kg

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CG Dowel Pin

🔧 Dowel Pin · Crankcase Alignment Pin · CG125/CG150 Engine · Engine Assembly Component

For CG125 · CG150 4-Stroke Engines · Engine Case Alignment

📋 Product Overview

This is the CG Dowel Pin, a critical alignment component for CG125 and CG150 4-stroke engine assembly. Specifically designed for CG series engines, this dowel pin is suitable for motorcycles, ATVs, and various other vehicles, making it the ideal choice for engine rebuilds or crankcase repairs.

Dowel pins (also known as crankcase alignment pins) are installed between the left and right crankcase halves to ensure precise alignment during assembly, maintaining the coaxiality and positional accuracy of the crankshaft, transmission, and other components. Manufactured from high-quality alloy steel with precision machining and heat treatment, this dowel pin offers excellent dimensional accuracy and wear resistance, ensuring engine assembly precision and operational reliability.

✨ Core Functions: Precisely align left and right crankcase halves · Ensure crankshaft bearing coaxiality · Guarantee transmission gear meshing accuracy · Prevent crankcase misalignment

🔧 Technical Information

📌 Dowel Pin Function

CG series engines use a split crankcase design. Dowel pins are installed in alignment holes on the crankcase mating surface, ensuring precise alignment of the left and right crankcase halves during assembly, maintaining coaxiality of rotating components such as the crankshaft and transmission.

📌 Importance

Though small, dowel pins are critical for engine assembly precision. Worn or damaged dowel pins can cause crankcase misalignment, leading to bearing misalignment, poor gear meshing, noise, vibration, and even severe engine failure.

📐 Specifications

Displacement

125cc / 150cc

Engine Models

CG125 · CG150

Material

High-Quality Alloy Steel

Surface Finish

Precision Ground · Rust-Proof

Mounting Location

Between Left and Right Crankcase Halves

Quantity

Diameter

Standard CG Spec

Length

Standard CG Spec

⚠️ Dowel Pin Failure Symptoms

💨 Common Symptoms

• Unusual engine noise (gear meshing sounds)
• Hard shifting or jumping out of gear
• Excessive engine vibration
• Premature crankshaft bearing wear
• Engine oil leaks (poor crankcase seal)
• Loose or broken crankcase bolts

🔍 Possible Causes

• Wear from prolonged use
• Damage from improper installation
• Uneven crankcase bolt torque causing abnormal pin loading
• Deformed or broken dowel pin
• Worn crankcase locating holes

⚠️ Important Note: Dowel pin failure can cause crankcase misalignment, resulting in bearing misalignment, poor gear meshing, and severe engine failure. If you experience the symptoms above, inspect and replace the dowel pins and related components promptly.

🏍️ Compatible Vehicles

This dowel pin 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 dowel pin is suitable for CG125 and CG150 engine crankcase alignment. During installation, it is recommended to inspect the condition of the crankcase locating holes and repair 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 accurate fit with locating holes.
Heat Treatment: Precision heat treatment process improves hardness and fatigue resistance, extending service life.
OEM Specification: Manufactured to exact 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.
Ensures Assembly Precision: Guarantees precise crankcase alignment, bearing coaxiality, and gear meshing accuracy.

🔧 Installation Guide

1. Remove the engine from the frame.
2. Split the left and right crankcase halves to access the dowel pins.
3. Remove the old dowel pins and inspect the locating holes for wear.
4. Clean the locating holes and crankcase mating surfaces, removing all oil and contaminants.
5. Insert the new dowel pins into the locating holes, ensuring they are fully seated.
6. Join the left and right crankcase halves, ensuring the dowel pins align with the corresponding holes.
7. Install crankcase bolts and tighten in a diagonal pattern in stages to specified torque.
8. Check the crankcase mating surface gap to ensure proper sealing.
9. Reinstall the engine, add fresh engine oil, and start the engine to test operation.
Important Note: Ensure dowel pins are fully seated in the locating holes. Tighten crankcase bolts in a diagonal pattern with even torque. Professional installation is strongly recommended.

⚠️ Important Notice: This is the CG Dowel Pin, designed for CG125 and CG150 4-stroke engines.
Spec Confirmation: Before purchasing, verify your engine model to ensure compatibility.
Installation Note: Ensure dowel pins are fully seated in the locating holes. Tighten crankcase bolts in a diagonal pattern with even torque. Improper installation can cause crankcase misalignment and severe engine failure. Professional installation is strongly recommended.
Recommended Parts: When replacing dowel pins, it is recommended to inspect the condition of the crankcase locating holes and repair 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.