YP100 Driven Main Shaft

🔧 YP100 Driven Main Shaft (Clutch Shaft)

📦 Fits Engine: YP100 4-Stroke

⚙️ Driven Main Shaft · Clutch Shaft · OEM Specification

📍 Installation Position: CVT Transmission / Clutch Assembly

✅ Precision Machined · High Strength Material · Direct Replacement · Suitable for YP100 4-Stroke Scooter Engines

This product is a YP100 4-stroke engine-specific driven main shaft (clutch shaft), a core transmission component of the CVT system and clutch assembly. This shaft is installed inside the rear pulley assembly, connecting the clutch to the final drive mechanism, transmitting engine power to the rear wheel. Manufactured from high-quality alloy steel with precision machining and heat treatment, it offers high strength, excellent wear resistance, and superior torsional performance. It is an excellent replacement for the scooter's original clutch shaft.

Over time, the driven main shaft may experience spline wear, journal wear, bending deformation, or fatigue fracture, leading to poor power transmission, clutch slipping, abnormal noise, or even transmission failure. Timely replacement of a damaged driven main shaft is critical to ensuring proper CVT system operation and driving safety.

• ✅ OEM Specification: Manufactured strictly to original technical standards. Mounting dimensions match original parts completely for direct replacement.
• 🛡️ High Strength Alloy Steel: Made from premium alloy steel for excellent torsional strength and durability.
• 🔧 Precision Machined: Splines and journals precision machined for high fit accuracy and smooth power transmission.
• 💪 Heat Treated: Heat treatment process enhances surface hardness and wear resistance.
• 🔄 Direct Replacement: Directly replaces worn, deformed, or damaged original driven main shafts.

✅ Typical Signs That Driven Main Shaft Replacement Is Needed:
• Poor acceleration, rough power transmission.
• Clutch slipping — engine RPM rises but speed does not increase.
• Abnormal noise (grinding, clicking) from the rear drive area.
• Severely worn splines, loose fit.
• Bent or broken shaft.
If you experience any of these symptoms, please inspect and replace the driven main shaft promptly.

✅ Installation Tips:
1. Remove the CVT side cover and rear pulley assembly before replacement.
2. Remove the old driven main shaft, checking bearings and oil seals for damage.
3. Clean the mounting area and spline slots, ensuring no oil or debris.
4. When installing the new shaft, ensure proper spline alignment and full seating.
5. Tighten retaining nuts to OEM torque specifications.
6. After installation, start the engine and verify the CVT operates smoothly.
Professional installation by a qualified technician is recommended.

⚠️ Important Notice: This product is a YP100 driven main shaft (clutch shaft), suitable for YP100 4-stroke scooter engines. Minor variations may exist between production batches. If your specific model is not listed, please contact us for compatibility verification. Images are for reference only; actual product may vary.