Starter motor for YAMAHA TDR125 DT125 RDT125X with 9-tooth pinion, original part number 3MB-81800-02. Starter assembly.

This is a complete starter motor, specifically designed for Yamaha TDR125, DT125, and RDT125X (off-road/street) motorcycles. It features a 9-tooth drive pinion and is fully compatible with original part number 3MB-81800-02. This starter motor is ready to install and directly replaces original starters with issues such as worn carbon brushes, a faulty ignition coil, a damaged pinion, or solenoid malfunction due to long-term use. It restores reliable electric starting functionality to these classic two-stroke models. [Exact Vehicle Model and Part Number Compatibility] Compatible Vehicle Models: YAMAHA TDR125 (everyday two-stroke motorcycle), YAMAHA DT125 (endurance/off-road two-stroke motorcycle), YAMAHA RDT125X (market-specific model). Original Part Number: 3MB-81800-02. Important Note: This product is a complete starter assembly. Before purchasing, please check if the part number of your old starter is 3MB-81800-02 and carefully compare its shape, mounting holes, and connectors with the product image to ensure compatibility. This is the safest way to guarantee compatibility with these two-stroke engines. 【Detailed Specifications and Product Benefits】

Specifically Designed for Two-Stroke Engines: Optimized for the operating characteristics of two-stroke engines (different compression ratios and ignition timings), ensuring smooth and reliable starting.

Original Specifications, Perfect Compatibility: Manufactured to the exact dimensions and performance specifications of part number 3MB-81800-02, this guarantees perfect engagement with the flywheel ring gear.

The mounting holes and wiring harness connectors exactly match the original vehicle design. Durable and Reliable: Robust housing with wear-resistant carbon brushes and heavy-duty bearings. The 9-tooth drive pinion, made of alloy steel, is heat-treated and reinforced, ensuring it can withstand even off-road conditions. Easy installation: This product comes complete with motor, gearbox, and electromagnetic switch. The interfaces and electrical parameters are perfectly matched to the original vehicle, simplifying installation.