YP100 Cylinder Assy

Brand: Mortch Motor
Product Code: MIYP100-5003

Product Viewed: 295

Availability: Pre-Order 1-2 Weeks🔔

Weight: 1.60kg

Packing Size: 14.00 x 13.00 x 10.00cm

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🏍️ Yamaha 100 Cylinder Assembly

📦 Part Number: MIYP100-5003

⚙️ High Quality · Air Cooled · Direct Replacement

📍 Compatible Engine: Yamaha JOG100 · Linhai LY149QMG

✅ Precision Cast Cylinder · Wear-Resistant Sleeve · Includes Piston & Piston Pin · Drop-In Fit

📋 Product Overview

This product is a high-quality Yamaha 100 Cylinder Assembly, part number MIYP100-5003. Specifically designed for air-cooled Yamaha JOG100 and Linhai LY149QMG engines, this cylinder assembly is the ideal replacement for engine overhauls or power restoration projects.

The cylinder is one of the most critical engine components, guiding piston movement and forming the combustion chamber. With accumulated mileage, the cylinder wall may suffer from wear, scoring, or out-of-round conditions, resulting in reduced compression pressure, oil burning, and power loss. This cylinder assembly features precision casting with a high-quality wear-resistant sleeve, matched with a premium piston and piston pin to restore original engine performance.

✅ High Quality Assurance: Manufactured to exact original specifications. Key dimensions including bore diameter, height, and port positions match OEM specifications for a perfect fit and reliable operation.

📐 Specifications

🔖 Part Number: MIYP100-5003

🏷️ Product Name: Cylinder Assembly (w/ Piston & Pin)

🔧 Piston Diameter: Ф49mm

📏 Piston Pin Size: Ф13 × 38.5mm

🌡️ Cooling Type: Air Cooled

🔩 Cylinder Sleeve: Wear-Resistant Cast Iron Sleeve

🏍️ Compatible Models & Engines

This Cylinder Assembly (MIYP100-5003) is compatible with the following models and engines:

Yamaha JOG100 · Air-Cooled 2-Stroke
Yamaha RS100 · Air-Cooled 2-Stroke
Linhai LY149QMG Engine
Yamaha 100cc Series Air-Cooled Scooters

📌 Fitment Note: This cylinder assembly is designed for air-cooled Yamaha 100 series engines with 49mm bore diameter. Before installation, please confirm your original cylinder is 49mm bore and air-cooled type. If your specific model is not listed, please contact us with your engine model or VIN for compatibility verification.

⚙️ Product Features

🔩 Precision Cast Cylinder: High-quality aluminum alloy casting provides excellent heat dissipation and structural strength.
🛡️ Wear-Resistant Sleeve: Cylinder sleeve features surface hardening treatment for superior wear resistance and extended service life.
⚙️ Premium Piston: Matching Ф49mm piston made from high-silicon aluminum alloy with low thermal expansion for stable operation.
🔧 Complete with Piston Pin: Ф13×38.5mm precision-ground piston pin ensures accurate fit and smooth operation.
🔄 Direct Replacement: Complete assembly includes cylinder, piston, piston pin, and piston rings — ready for installation out of the box.

✅ Typical Signs That Cylinder 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 (typically under 6kg/cm²).
• Visual inspection reveals scoring, scratches, or a wear ridge on the cylinder wall.
Timely cylinder replacement restores engine power, reduces fuel consumption, and extends overall engine life.

✅ Installation Tips:
1. Thoroughly clean the engine exterior before removing the old cylinder to prevent debris from entering the crankcase.
2. Inspect the crankcase mating surface and remove all old gasket residue before installing the new cylinder.
3. When installing piston rings, pay attention to ring end gap orientation — stagger them as specified in the manual.
4. Tighten cylinder head bolts to OEM torque specifications in 2-3 even stages.
5. After installation, perform a break-in period — avoid hard acceleration and heavy loads.
Professional installation by a qualified technician is strongly recommended. Improper installation may cause cylinder scoring or sealing failure.

⚠️ Important Notice: This product is a Yamaha 100 Cylinder Assembly, part number MIYP100-5003. Compatible with air-cooled Yamaha JOG100 and Linhai LY149QMG engines (Ф49mm bore). Cylinder height and port positions may vary between different model years or versions. We recommend confirming your original cylinder 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.