YP100 8 Pole Magneto Stator

⚡ Yamaha 100 Stator Assembly

📦 Part Number: MIYP100-5040

⚙️ 8-Coil Stator Magneto · 4-Stroke 50cc · LY149QMG Engine

📍 Installation Position: Magneto Cover Interior · Left Side of Crank Shaft

✅ 8-Coil Design · Copper Windings · Insulated · Direct Replacement

This product is a Yamaha 100 Stator Assembly (Magneto Stator), part number MIYP100-5040. This is an 8-coil stator commonly used on 4-stroke 50cc LY149QMG engines and Yamaha 100 series scooters. It is a core component of the magneto system.

The stator (also referred to as a stator comp) is a vital part of the engine's charging and ignition system. Working in conjunction with the flywheel magnet, it generates AC power to supply the vehicle's electrical system and provides trigger signals for the ignition system. With extended use, stator coils may fail due to heat aging, insulation breakdown, or inter-turn shorts, resulting in no charging, starting difficulties, or stalling while riding. This stator features an 8-coil design with pure copper windings and excellent insulation, providing a perfect replacement to restore charging and ignition functions.

• ⚡ 8-Coil Design: Provides ample charging current and stable ignition trigger signals to meet all electrical demands.
• 🧪 Pure Copper Windings: High-quality pure copper magnet wire ensures excellent conductivity and low heat generation.
• 🛡️ Excellent Insulation: Coils undergo insulation impregnation treatment for heat resistance and moisture protection, extending service life.
• 🔩 Precision Core: Tightly stacked silicon steel laminations provide high magnetic permeability and superior energy conversion efficiency.
• 🔄 Direct Replacement: Mounting dimensions match OEM exactly, with plug-and-play connectors — no modifications needed.

✅ Typical Signs That Stator Replacement Is Needed:
• Battery fails to charge properly, frequently losing power.
• Hard starting, or unstable idle with stalling after starting.
• Headlights dimming intermittently, abnormal charging indicator.
• Multimeter shows coil resistance outside normal range or coil shorted to ground.
• Visual inspection reveals burnt, discolored, or broken insulation on the coils.
Replacing a faulty stator promptly restores proper charging system function and prevents starting failures and stalling due to power loss.

✅ Installation Tips:
1. Disconnect the battery negative terminal before removing the magneto cover.
2. Note the lead wire routing when removing the old stator for reference during installation.
3. Clean the mounting surface and inspect the flywheel magnet for looseness or damage.
4. Tighten the mounting screws to OEM torque specifications when installing the new stator.
5. Connect the lead wire connector and ensure terminal contact is secure and not loose.
6. After installation, start the engine and measure charging voltage (typically 13.5-14.5V).
Professional installation by a qualified technician is strongly recommended. Improper electrical system installation may cause short circuits or charging failure.

⚠️ Important Notice: This product is a Yamaha 100 Stator Assembly, part number MIYP100-5040. Suitable for 8-coil configuration on 4-stroke LY149QMG engines and Yamaha 100 series models. Coil count, lead wire configuration, and connector type may vary across different model years and versions. We recommend confirming your original stator specifications before purchase. Images are for reference only; actual product may vary.