CG Gear of Starter Idle
- Brand: Mortch Motor
- Product Code: MICG125-1092
- Product Viewed: 177
- Availability: Pre-Order Pre-Order
- Weight: 0.10kg
US$1.43 10 SOLD
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CG Starter Idle Gear
⚙️ Starter Idle Gear · Starter Intermediate Gear · Electric Start Component · CG125/CG150 Specific
Affordable Standard Quality Starter Idle Gear · For CG125, CG150 4-Stroke Engines · 14T/16T Compound Gear
This is the CG Starter Idle Gear — an affordable standard quality starter idle gear specifically designed for CG125 and CG150 4-stroke engines. This component is an important part of the electric start system, serving as an intermediate gear between the starter motor and the starter ring gear, responsible for transmitting power and changing the direction of rotation.
The starter idle gear (also known as the starter intermediate gear or starter drive gear) is typically installed inside the engine between the starter motor pinion and the starter ring gear, providing power transmission, torque multiplication, and direction change. This product features a compound gear design with 14 teeth on the small gear and 16 teeth on the large gear, providing two-stage reduction to transmit starter motor power to the crankshaft for reliable engine starting. This is the perfect replacement when the original starter idle gear exhibits worn teeth, broken teeth, or starting noise.
✨ Core Functions: Transmit starter motor power · Provide torque multiplication · Change rotation direction · Affordable replacement · Standard quality
Product Name
Starter Idle Gear / Starter Intermediate Gear
Compatible Engines
CG125 / CG150 4-Stroke
Small Gear Teeth
14 Teeth
Large Gear Teeth
16 Teeth
Gear Type
Compound Gear (One-Piece)
Quality Standard
Standard Quality
Gear Material
High-Quality Steel (Heat Treated)
Mounting Type
Direct OEM Replacement
Gear Ratio
Approx. 1.14:1
This starter idle gear is compatible with the following engines and vehicles:
- Engine Types: CG125, CG150 4-stroke engines
- Vehicle Types: Honda CG series, Chinese-made CG series motorcycles, dirt bikes, street bikes
- Applications: Starter idle gear wear replacement, starting noise repair, electric start system repair, engine overhaul
📌 Compatibility Note: This starter idle gear features a 14T/16T compound gear design for CG125 and CG150 4-stroke engines. Before installation, verify that your original starter idle gear specification matches this product.
⚡ Power Transmission
Acts as an intermediate gear between the starter motor pinion and the starter ring gear, transmitting starter motor power to the crankshaft.
🔧 Torque Multiplication
The 14T/16T gear ratio converts the starter motor's high-speed, low-torque output into low-speed, high-torque for cranking.
🔄 Changes Rotation Direction
The idle gear reverses rotation direction so that the starter motor's rotation aligns with the crankshaft starting direction.
🛡️ Starting Reliability
Precision-machined gears ensure smooth power transmission and reliable electric start operation.
⚠️ Symptoms of Starter Idle Gear Failure: Grinding or clicking noise when pressing start button, starter motor spins but engine does not crank, hard starting, metal rubbing sound during start, worn or broken gear teeth. If these issues occur, inspect and replace the starter idle gear promptly.
- High-Quality Steel Construction: Made from high-strength alloy steel with precision-machined gears for excellent strength and wear resistance.
- Heat-Treated Gear Teeth: Gear teeth are heat-treated for high hardness, wear resistance, and impact strength.
- Compound Gear Design: One-piece 14T/16T compound gear for compact design and easy installation.
- Precision Gear Machining: Accurate gear tooth profile ensures smooth engagement, quiet operation, and reliable performance.
- OEM Specification Standards: Manufactured to CG125 and CG150 original specifications for perfect fitment.
- Affordable Price: Standard quality design offers excellent value for routine maintenance and repairs.
🔧 Installation Guide
1. Disconnect the negative battery terminal before starting to prevent short circuits.
2. Remove the engine side cover to access the starter idle gear.
3. Remove the retaining pin or circlip and take out the old starter idle gear.
4. Inspect the starter idle gear shaft sleeve or bearing for wear; replace if necessary.
5. Install the new starter idle gear, ensuring proper engagement with the starter motor pinion and starter gear.
6. Install the retaining pin or circlip to secure the gear axially.
7. Check that the gear rotates smoothly without binding.
8. Reinstall the side cover with a new gasket, reconnect the battery, and test the starting system.
Spec Confirmation: Before purchasing, verify that your original starter idle gear specification matches this product (14T/16T) to ensure compatibility.
Installation Caution: Starter idle gear installation involves engine internals. Professional installation is strongly recommended. Inspect the gear shaft sleeve or bearing during installation and replace if necessary. Product images are for reference only; please refer to the actual product.
- 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 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.
- 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.




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