YP100 Oil Pump

🛢️ Yamaha 100 Oil Pump Assembly

📦 Part Number: MIYP100-5053

⚙️ Replacement Oil Pump · Yamaha RS100/JOG100 · LY149QMG

📍 Installation Position: Crankcase · Oil Pump Mount

✅ Precision Gears · Stable Oil Supply · Reliable Lubrication · Direct Replacement

This product is a Yamaha 100 Oil Pump Assembly, part number MIYP100-5053. It is a replacement oil pump designed for Yamaha RS100, JOG100, and LY149QMG 4-stroke engines — a core component of the engine lubrication system.

The oil pump is responsible for drawing oil from the sump and pressurizing it to supply all engine friction surfaces — crankshaft journals, connecting rod bearings, camshaft, valve train, etc. — ensuring proper lubrication and cooling of all moving parts. With accumulated mileage, oil pump gears may wear, resulting in reduced oil pressure, insufficient lubrication, and potentially catastrophic engine failure such as seized pistons or spun bearings. This oil pump features precision-machined gears and is manufactured to strict OEM specifications, ensuring stable oil pressure and reliable lubrication.

• ⚙️ Precision Gears: Oil pump gears are precision-machined with accurate tooth profiles for smooth engagement and stable oil pressure.
• 🛢️ Stable Oil Supply: Optimized pump body design ensures consistent oil flow and pressure across various engine speeds.
• 🔧 Reliable Lubrication: Ensures all engine friction surfaces receive adequate lubrication — effectively extends engine life.
• 🧪 Wear-Resistant Material: Gears and pump body manufactured from durable materials for long service life and high reliability.
• 🔄 Direct Replacement: Mounting dimensions match OEM — directly replaces the old oil pump without any modifications.

✅ Typical Signs That Oil Pump Replacement Is Needed:
• Oil pressure warning light stays on (low oil pressure).
• Unusual metallic grinding noise during engine operation (insufficient lubrication).
• Visual inspection reveals worn oil pump gears or scoring on the pump body.
• Abnormal oil consumption with no external leaks (possible insufficient oil supply).
• During engine overhaul, oil pump replacement is recommended for complete restoration.
Replacing a worn oil pump promptly ensures proper engine lubrication and prevents severe damage from oil starvation.

✅ Installation Tips:
1. Drain the engine oil before removing the old oil pump.
2. Clean the oil pump mounting surface — ensure no debris or old sealant remains.
3. Apply a small amount of clean engine oil to the gears and pump body before installation (for lubrication and priming).
4. Ensure the drive gear properly meshes with the crankshaft drive gear.
5. Tighten mounting bolts to OEM torque specifications.
6. After installation, refill with fresh engine oil and start the engine — verify the oil pressure light goes out.
Professional installation by a qualified technician is recommended. Improper installation may cause oil pump damage or insufficient oil supply.

⚠️ Important Notice: This product is a Yamaha 100 Oil Pump Assembly, part number MIYP100-5053. Compatible with Yamaha RS100, JOG100, and Linhai LY149QMG / GY6 100cc 4-stroke engines. Drive gear tooth count may vary across different model years or versions. We recommend confirming your original oil pump specifications before purchase. Images are for reference only; actual product may vary.