YP100 Inlet/Exhaust Valve Sets

Brand: Mortch Motor
Product Code: MIYP100-5027

Product Viewed: 265

Availability: In Stock

Weight: 0.11kg

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🔧 Yamaha 100 Valve Set

📦 Part Number: MIYP100-5027

⚙️ Intake & Exhaust Valve Set · 4-Stroke Scooter · Improved Torque

📍 Installation Position: Cylinder Head · Valve Train

✅ Higher Torque · Stronger Acceleration · Smooth & Durable · Direct Replacement

📋 Product Overview

This product is a Yamaha 100 Intake & Exhaust Valve Set, part number MIYP100-5027. It is a high-performance replacement valve set designed for 4-stroke scooter engines — one of the most cost-effective ways to achieve real performance tuning.

The intake and exhaust valves are core components of the engine's valve train, responsible for controlling the intake of the air-fuel mixture and the exhaust of combustion gases. Working closely together with various 4-stroke scooter manufacturers, we have managed to increase engine performance and running smoothness. The result does not affect everyday drivability while still offering smooth running and durability. The valve sets can, of course, be used with original (restricted) engines. Its strongest point is that it provides higher torque which translates into better acceleration.

✅ Quality Assurance: Manufactured to exact original specifications. Valve stem diameter, valve head diameter, and overall length match OEM parts for a perfect fit and reliable operation.

📐 Specifications

🔖 Part Number: MIYP100-5027

🏷️ Product Name: Intake & Exhaust Valve Set

📦 Set Contents: Intake Valve + Exhaust Valve (1 each)

🧪 Valve Stem Material: High-Strength Alloy Steel

🔧 Displacement: 100cc 4-Stroke

📍 Installation: Cylinder Head · Valve Train

🏍️ Compatible Models & Engines

This Valve Set (MIYP100-5027) is compatible with the following models and engines:

Yamaha JOG100 · 4-Stroke
Yamaha RS100 · 4-Stroke
GY6 100cc / 125cc 4-Stroke Engines
Linhai LY149QMG Engine
Other scooters with GY6-style engines

📌 Fitment Note: This valve set is designed for GY6 series 100cc 4-stroke engines. Valve dimensions may vary across different model years or displacements. We recommend confirming your original valve specifications before purchase. If your specific model is not listed, please contact us with your engine model for compatibility verification.

🚀 Performance Benefits

🏁 Higher Torque · Stronger Acceleration

This valve set is optimized to deliver higher torque output, translating directly into stronger acceleration. Whether it's city commuting starts or hill climbing, you'll feel the noticeable power improvement.

🔧 Smooth & Durable · Great Value

Enhances performance while maintaining smooth operation and durability without affecting everyday drivability. Of course, this valve set can also be used with original (restricted) engines — one of the most cost-effective performance upgrades available.

⚙️ Product Features

⚡ Higher Torque Output: Optimized valve design provides greater intake/exhaust efficiency, significantly improving starting and acceleration performance.
🔄 Smooth & Durable: Enhances performance while maintaining smooth operation and durability — does not affect everyday drivability.
🧪 High-Strength Material: Manufactured from premium alloy steel with heat treatment for wear resistance and high-temperature durability, ensuring long service life.
🛡️ Compatible with Stock Engines: Can be used with original (restricted) engines — one of the most cost-effective performance upgrades available.
🔩 Precision Machined: Valve stems are precision-ground; valve face angles are accurately machined for perfect sealing with the valve seat.

✅ Typical Signs That Valve Replacement Is Needed:
• Noticeable power loss — poor acceleration.
• Valve tapping noise persists even after adjustment.
• Poor valve sealing — low compression, hard starting.
• Black or blue smoke from exhaust (failed valve stem seals causing oil burning).
• Visual inspection reveals valve face burning, bent or worn valve stem.
Replacing worn/damaged valves promptly restores engine power and fuel economy.

✅ Installation Tips:
1. Remove the cylinder head and extract the old valves.
2. Clean the valve guides and inspect for wear.
3. Apply a small amount of engine oil to the valve stem before installation.
4. Install valve stem seals, valve springs, and retainers with collets.
5. After installation, lap the valves against the valve seats to ensure proper sealing.
6. Adjust valve clearance to OEM specifications.
Professional installation by a qualified technician is strongly recommended. Improper valve installation may cause sealing issues or severe engine damage.

⚠️ Important Notice: This product is a Yamaha 100 Valve Set, part number MIYP100-5027. Suitable for 100cc 4-stroke GY6 series engines. Valve stem diameter, head diameter, and overall length may vary across different model years or displacements. We recommend confirming your original valve specifications before purchase. Images are for reference only; actual product may vary.

🔧 Compatibility Notice

Please verify that this part fits your specific vehicle model and year. Many vehicles share similar names but use different components depending on year or market region.
We strongly recommend cross-checking with your vehicle's owner's manual or contacting us for confirmation before placing your order.

📄 Product Disclaimer

Product images, measurements, and descriptions are for reference only. Slight variations in color or appearance may occur due to manufacturing batches or photography lighting—functional specifications remain identical to the ordered part.
Professional installation is mandatory. Mortch Motor assumes no liability for damages, injuries, or losses resulting from improper installation, misuse, unauthorized modification, or abnormal operation.

💰 Import Duties & Taxes

All listed prices EXCLUDE shipping costs, import duties, taxes, and customs clearance fees. These charges (if applicable) are determined and collected by your local customs authority and are solely the buyer's responsibility.
In case of return due to unpaid duties/taxes or refusal to clear customs, the buyer shall bear the original shipping cost, return shipping fees, and any associated administrative charges deducted from the refund.

📌 Order Confirmation: By completing your purchase, you acknowledge that you have read, understood, and agreed to all terms above. For any questions, please contact our support team prior to ordering.