YP100 Final Gear

⚙️ Yamaha 100 Final Gear

📦 Part Number: MIYP100-5050

⚙️ Replacement Final Drive Gear · JOG100 4-Stroke

📍 Installation Position: Final Drive Box · Rear Wheel Side

✅ Precision Gear · Wear-Resistant Material · Efficient Transmission · Direct Replacement

This product is a Yamaha 100 Final Gear (Final Drive Gear), part number MIYP100-5050. It is a replacement final drive gear designed for JOG100 4-stroke engines and GY6 series drivetrains — a core component of the final drive gearbox.

The final gear (final drive gear) is the last reduction stage in the drivetrain, responsible for further reducing speed and increasing torque from the CVT before transmitting power to the rear wheel. With accumulated mileage, the final gear may wear due to constant load, resulting in increased transmission noise, rough power delivery, sluggish acceleration, or even gear slipping. This gear is manufactured from high-strength alloy steel with precision machining and heat treatment, providing a perfect replacement to restore drivetrain efficiency.

• 🔩 Precision Gear: High-accuracy gear hobbing ensures accurate tooth profiles, smooth engagement, high transmission efficiency, and low operating noise.
• 🧪 High-Strength Material: Premium alloy steel construction with case hardening treatment delivers high surface hardness, excellent wear resistance, and long service life.
• 🛡️ Efficient Transmission: Precise tooth profile and backlash ensure smooth, efficient power transfer with minimal drivetrain loss for improved acceleration response.
• 🔄 Direct Replacement: Mounting dimensions and tooth count match OEM specifications — installs directly into the final drive gearbox without any modifications.

✅ Typical Signs That Final Gear Replacement Is Needed:
• Unusual noise from the final drive gearbox (gear wear noise).
• Sluggish acceleration — rough power delivery.
• Reduced top speed or binding sensation when rotating the rear wheel.
• Visual inspection reveals heavy wear, pitting, or broken teeth on the gear.
• During final drive gearbox overhaul, worn gears should be inspected and replaced as needed.
Replacing a worn final gear promptly restores drivetrain efficiency, eliminates noise, and improves acceleration performance.

✅ Installation Tips:
1. Remove the rear wheel and final drive gearbox cover.
2. Remove the old final gear and inspect bearings and gear shaft for wear.
3. Clean the final drive gearbox interior and refill with fresh gear oil.
4. When installing the new final gear, ensure bearings are properly seated and gear mesh clearance is correct.
5. Tighten mounting bolts to OEM torque specifications.
6. After installation, add the correct amount of gear oil to the specified level.
Professional installation by a qualified technician is recommended. Improper gear installation may cause drivetrain noise or premature gear failure.

⚠️ Important Notice: This product is a Yamaha 100 Final Gear, part number MIYP100-5050. Suitable for 100cc 4-stroke GY6 series engine final drive systems. Tooth count and module may vary across different model years or displacements. We recommend confirming your original final gear specifications before purchase. Images are for reference only; actual product may vary.