C100 Start Axle Assy

Brand: Mortch Motor
Product Code: MIC100-6044

Product Viewed: 174

Availability: Pre-Order

Weight: 0.60kg

Packing Size: 22.00 x 6.00 x 6.00cm

0 reviews / Write a review

US$6.25 79 SOLD

Shipping To：

More Quotes

C100 Starter Shaft Assembly

🔧 Starter Shaft · Kick Start Shaft · Starting Mechanism · Engine Component

For Moped, Cub & ATV · Fits 139FMB, 147FMD, 147FMF, 150FMG engines

📋 Product Overview

This is the C100 Starter Shaft Assembly (also known as kick start shaft or kick start mechanism), a core component of the engine's kick start system. It is suitable for Mopeds, Cub series, and ATVs, and fits engines including 139FMB, 147FMD, 147FMF, 150FMG, and similar models.

The starter shaft assembly is installed in the right side of the engine case, driven by the kick start lever. It converts human force into rotational torque to rotate the crankshaft and start the engine. A return spring ensures the kick start lever automatically returns to its original position after starting. Manufactured from high-strength alloy steel with precision-machined and heat-treated gears, it offers excellent wear resistance and impact strength. This assembly is the ideal replacement when the original starter shaft shows signs of bending, breakage, gear wear, or return spring failure.

✨ Key Functions: Transmits starting force · Drives crankshaft rotation · Automatic return function · Wear resistant & impact resistant · Reliable starting

📐 Specifications

Product Name

Starter Shaft Assembly

Engine Application

139FMB / 147FMD / 147FMF / 150FMG

Material

High-Strength Alloy Steel

Heat Treatment

Carburizing · Surface Hardening

Return Spring

High-Strength Torsion Spring

Position

Right Side Engine Case

🔧 Assembly Components

🔩

Starter Shaft

High-Strength Steel Shaft

⚙️

Starter Gear

Precision-Machined Teeth

🌀

Return Spring

High-Strength Torsion Spring

🔗

Retaining Parts

Circlips, Washers, etc.

💡 Note: This starter shaft assembly includes complete starting mechanism components for direct installation.

🔧 Compatible Engine Models

This starter shaft assembly fits the following engine models:

139FMB

147FMD

147FMF

150FMG

Engine Reference Information:

139FMB: 1P39FMB / 1P39QMB · 50cc-125cc universal engine
147FMD: 1P47FMD · 70cc-110cc engine
147FMF: 1P47FMF · 90cc-110cc engine
150FMG: 1P50FMG · 125cc-150cc engine

Note: This starter shaft assembly is for kick start version engines. Electric start versions use a different starting mechanism. Please verify your engine type before purchase.

🛵 Compatible Vehicles

Mopeds - Kick start 50cc-150cc moped models (underbones, scooters, etc.)
Cub Series - Honda Cub kick start models and clone models
ATVs - Kick start small-engine quad bikes / kids ATVs
Dirt Bikes - Kick start small off-road motorcycles
Other vehicles using 139FMB, 147FMD, 147FMF, 150FMG engines with kick start

📌 Compatibility Note: This starter shaft assembly is suitable for the kick start version of the engine models listed above. Please verify your engine has kick start before purchase.

⚙️ Importance of Starter Shaft Assembly

🦶 Starting Force Transmission

Converts foot force into rotational torque to rotate the crankshaft.

🌀 Automatic Return

Return spring ensures the kick start lever automatically returns to its original position.

⚙️ Reliable Starting

Starter gear meshes with starter idler gear to ensure effective engine cranking.

🛡️ Durability Key

Withstands high impact loads; requires high-strength materials and heat treatment.

⚠️ Starter Shaft Failure Symptoms: Kick start slipping, lever does not return, abnormal noise when starting, hard starting, loose lever, gear sticking. If these occur, inspect and replace the starter shaft assembly.

⚠️ Common Failure Symptoms

Kick Start Slipping: Lever feels like it spins freely without engaging the engine.
Lever Does Not Return: Kick start lever fails to spring back to its original position.
Unusual Noise: Clicking or grinding noise when operating the kick start lever.
Hard Starting: Abnormal resistance or inability to start the engine effectively.
Loose Lever: Excessive play or wobble at the lever mounting point.
Worn Starter Gear: Inspection reveals worn, chipped, or deformed gear teeth.
Broken Return Spring: Spring breakage causes lever return failure.

If you experience these symptoms, inspect the starter shaft assembly and starter idler gear, and replace if necessary.

✨ Product Features

OEM Specifications: Manufactured to original dimensions and tooth profile for perfect fitment.
High-Strength Alloy Steel: Made from premium alloy steel with excellent strength and toughness.
Precision-Machined Gear: Precision machining ensures smooth engagement and reliable power transfer.
Carburizing & Hardening: Gear teeth are heat-hardened for superior wear resistance and long service life.
Quality Return Spring: High-strength torsion spring provides reliable return force and fatigue resistance.
Complete Assembly: Includes all required components for installation; no separate parts needed.
Direct Replacement: Directly replaces worn or damaged original starter shaft assembly without modification.

🔧 Installation Tip

1. Replacing the starter shaft assembly requires removing the right engine cover; professional installation is recommended.
2. Clean the starter shaft mounting bore and case thoroughly before installation.
3. Inspect the starter idler gear for wear; it is recommended to inspect and replace if necessary.
4. Pay attention to return spring orientation during installation; ensure proper preload.
5. Ensure circlips are fully seated in their grooves when installing retaining parts.
6. After installation, manually rotate the starter shaft to check smooth return and proper gear engagement.
7. When installing the kick start lever, align the splines and tighten the mounting bolt to the specified torque.
8. Before starting the engine, manually operate the kick start several times to verify proper function.

⚠️ Important Notice: This is a C100 starter shaft assembly (kick start shaft), suitable for Mopeds, Cubs, ATVs, and vehicles using 139FMB, 147FMD, 147FMF, 150FMG engines with kick start.
Specification Confirmation: This product is for kick start versions. Electric start engines use a different starting mechanism. Please verify your engine type before purchase. Contact customer service if you have any questions.
Installation Notes: Pay attention to return spring orientation. It is recommended to inspect the starter idler gear simultaneously. Images are for reference only. The 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.