C100 Down Starter Motor Assy

C100 12V Electric Starter Motor Assembly

🔧 Starter Motor · Electric Starter · Starter Assembly · 12V Starter

For Mopeds, Cub Series, Dirt Bikes and ATVs · Compatible with 139FMB, 147FMD, 147FMF, 150FMG Engines

This is the C100 12V Electric Starter Motor Assembly, a core component of the engine electric start system. It is suitable for mopeds, Cub series vehicles, dirt bikes, and ATVs (All-Terrain Vehicles), compatible with 139FMB, 147FMD, 147FMF, 150FMG engine models.

This starter motor is commonly found on 50cc ATV and dirt bike engines but is also used on larger displacement models. When the start switch is engaged, the starter motor converts electrical energy from the battery into mechanical energy, driving the engine flywheel to rotate and bringing the engine up to starting speed. Made with high-quality magnets and pure copper windings in the armature, this unit delivers strong torque and reliable starting performance. This assembly is the ideal replacement when the original starter motor exhibits insufficient speed, abnormal noise, failure to turn, or internal wear.

This starter motor assembly is compatible with the following engine models:

• Mopeds - Various 50cc-150cc mopeds (underbone scooters, step-through scooters, etc.)
• Cub Series - Honda Cub and replica models
• Dirt Bikes - 50cc-125cc small displacement off-road motorcycles
• ATVs (All-Terrain Vehicles) - 50cc-150cc small four-wheel off-road vehicles / youth ATVs
• Other 12V electric start vehicles using 139FMB, 147FMD, 147FMF, 150FMG engines

• OEM Specification Standards: Manufactured according to original electrical parameters and mounting dimensions for perfect fitment.
• High-Quality Magnets: Utilizes high-performance permanent magnets for strong magnetic field and stable torque output.
• Pure Copper Armature: Armature windings use high-purity copper wire for excellent conductivity and low heat generation.
• Precision Gear: 12-tooth starter gear is heat-treated for durability, wear resistance, and smooth engagement.
• Quality Bearings: Precision ball bearings ensure smooth operation, low noise, and long service life.
• Direct Replacement Installation: Replaces aging or damaged original starter motor in the original mounting location without modifications.

🔧 Installation Guide

1. Before replacing the starter motor, disconnect the negative battery terminal to prevent short circuits.
2. Verify the starter motor mounting hole spacing (24.98mm) and number of teeth (12 teeth) match your original unit.
3. Align the starter motor's locating boss with the positioning hole on the engine case during installation.
4. Tighten the mounting bolts evenly in a diagonal pattern with torque of approximately 10-15 N·m.
5. When connecting power cables, ensure connections are secure and polarity is correct (red wire typically connects to positive terminal).
6. After installation, manually rotate the engine to confirm no binding, then test with battery power.
7. If starting issues persist after replacement, inspect the battery voltage, starter relay, start switch, and wiring.

⚠️ Important Notice: This product is the C100 12V Electric Starter Motor Assembly, suitable for mopeds, Cub series vehicles, dirt bikes, ATVs, and 12V electric start system vehicles using 139FMB, 147FMD, 147FMF, 150FMG engines.
Spec Confirmation: Before purchasing, confirm your vehicle uses a 12V electric start system and verify the mounting hole spacing (24.98mm) and number of teeth (12 teeth).
Installation Caution: Pay attention to correct wiring connections and ensure the starter is securely mounted. If issues persist after replacement, inspect the battery, starter relay, and wiring. Product images are for reference only; please refer to the actual product.