YP100 Piston Assy

Brand: Mortch Motor
Product Code: MIYP100-5005

Product Viewed: 297

Availability: In Stock

Weight: 0.11kg

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🏍️ Yamaha 100 Piston Assembly

📦 Part Number: MIYP100-5005

⚙️ High Quality Piston Assy · Air Cooled · Linhai LY149QMG

📍 Compatible Models: Yamaha RS100 · JOG100 · Linhai LY149QMG Engine

✅ Precision Piston · Includes Rings + Pin + Clips · Direct Replacement

📋 Product Overview

This product is a high-quality Yamaha 100 Piston Assembly, part number MIYP100-5005. This piston assembly is specifically designed for air-cooled Yamaha RS100, JOG100, and Linhai LY149QMG engines — an ideal replacement for engine overhauls or power restoration projects.

The piston is one of the most critical engine components, responsible for reciprocating movement within the cylinder and transferring combustion pressure to the crankshaft through the connecting rod. With accumulated mileage, the piston skirt and piston rings may suffer from wear, resulting in reduced compression pressure, oil burning, and power loss. This piston assembly includes the piston, compression rings, oil ring, piston pin, and retaining clips — a complete set manufactured from high-quality aluminum alloy with precision machining to restore original engine performance.

✅ High Quality Assurance: Manufactured to exact original specifications. Piston diameter Ф49mm, piston pin Ф13×38.5mm — key dimensions match OEM parts for a perfect fit and reliable operation.

📐 Specifications

🔖 Part Number: MIYP100-5005

🏷️ Product Name: Piston Assembly

🔧 Piston Diameter: Ф49mm

📏 Piston Pin Size: Ф13 × 38.5mm

📦 Kit Contents: Piston + Compression Rings + Oil Ring + Piston Pin + Clips

📍 Compatible Engine: LY149QMG · GY6 100cc

🏍️ Compatible Models & Engines

This Piston Assembly (MIYP100-5005) is compatible with the following models and engines:

Yamaha RS100 · Air-Cooled 4-Stroke
Yamaha JOG100 · Air-Cooled 4-Stroke
Linhai LY149QMG Engine
GY6 100cc Air-Cooled 4-Stroke Engine
Other scooters equipped with LY149QMG / GY6 100cc engines

📌 Fitment Note: This piston assembly is designed for air-cooled Yamaha RS100, JOG100, and Linhai LY149QMG / GY6 100cc 4-stroke engines with piston diameter Ф49mm and piston pin Ф13×38.5mm. Before installation, please confirm your original piston specifications. If your specific model is not listed, please contact us with your engine model for compatibility verification.

⚙️ Product Features

⚙️ Premium Piston: High-silicon aluminum alloy construction with low thermal expansion for stable operation and excellent wear resistance.
🔄 Complete Kit: Includes compression rings, oil ring, piston pin, and retaining clips — ready for installation with no additional parts needed.
🔧 Precision Machined: Piston skirt is precision-machined for accurate cylinder clearance and smooth operation.
🛡️ Quality Rings: Superior piston rings provide excellent sealing performance and effective oil control.
🔄 Direct Replacement: Dimensions match OEM — directly replaces the old piston assembly without any modifications.

✅ Typical Signs That Piston Assembly Replacement Is Needed:
• Engine hard to start, especially when cold.
• Noticeable power loss, poor acceleration, or reduced top speed.
• Excessive oil consumption with blue smoke from the exhaust.
• Compression test reading below factory specification.
• Visual inspection reveals scoring on the piston skirt or seized piston rings.
Timely piston assembly replacement restores engine power, reduces fuel consumption, and extends overall engine life.

✅ Installation Tips:
1. Note the piston orientation before removing the old piston for reference during installation.
2. When installing piston rings, pay attention to ring end gap orientation — stagger them 120° apart as specified.
3. Apply a small amount of engine oil to the pin bore and piston pin before installation.
4. When installing retaining clips, ensure they are fully seated in the grooves to prevent dislodgement.
5. After installation, manually rotate the crankshaft to verify smooth piston movement with no binding.
Professional installation by a qualified technician is strongly recommended. Improper installation may cause piston scoring or clip failure leading to engine damage.

⚠️ Important Notice: This product is a Yamaha 100 Piston Assembly, part number MIYP100-5005. Specifications: Piston Diameter Ф49mm, Piston Pin Ф13×38.5mm. Compatible with air-cooled Yamaha RS100, JOG100, and Linhai LY149QMG / GY6 100cc 4-stroke engines. Piston compression height may vary across different model years or versions. We recommend confirming your original piston 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.