C70 Crank Shaft Connecting Rod

Brand: Mortch Motor
Product Code: MIC70-6036

Product Viewed: 175

Availability: In Stock

Weight: 1.96kg

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US$13.75

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C70 Crankshaft Connecting Rod Assembly

For Moped, Cub, Dirt Bike & ATV

Fits Engines: 139FMB 147FMD 147FMF 150FMG

⚠️ Please confirm the specific specifications you need (connecting rod length/crank bearing size) before purchasing.

📋 Overview

This product is a C70 series crankshaft connecting rod assembly, designed for horizontal engines used in mopeds, Cub motorcycles, dirt bikes, and ATVs. It perfectly fits classic engine models such as 139FMB, 147FMD, 147FMF, and 150FMG. The crankshaft connecting rod is the core moving part of the engine, responsible for converting the reciprocating motion of the piston into rotational motion to output power. This product is made of high-quality alloy steel through forging or precision casting, undergoes dynamic balancing treatment and precision machining, ensuring smooth operation, durability, and reliability.

🔧 OEM Quality, Direct Replacement: Manufactured strictly to original specifications, the mounting dimensions are exactly the same as the original part, allowing direct replacement of worn or damaged original crankshaft connecting rod assembly without any modification.

⚠️ Important Selection Note: C70 crankshaft connecting rods may have different specifications (such as connecting rod length, crankpin diameter, bearing size, etc.). Please verify your engine model and required specific specifications. If in doubt, contact our customer service with your original part number or measurement data.

📐 General Specification Reference

🔹 C70 Crankshaft Connecting Rod Assembly (Typical Parameters)

Displacement: 70-90cc

Piston Pin Bore Diameter: 13mm

Crankpin Diameter: 18mm (common spec, subject to actual product)

Connecting Rod Center Distance: 85-95mm (varies by model)

Bearing Type: Needle Roller Bearing / Plain Bearing

Material: Alloy Steel

📌 Note: The above are common general parameters for the C70 series crankshaft. Actual products may vary slightly depending on the specific model (e.g., 139FMB vs. 150FMG). We offer multiple specifications of C70 crankshaft connecting rods. Please contact customer service for accurate matching.

🔧 Compatible Engine Models

This crankshaft connecting rod assembly is primarily compatible with the following 70-90cc horizontal engines:

139FMB 147FMD 147FMF 150FMG C70 Series Engines Other 70-90cc Horizontal Engines

📌 Compatibility Note: The engine models listed above belong to the C70/90 series. However, engines from different years or manufacturers may have slight variations in crankshaft connecting rod dimensions (such as rod length, bearing width). It is strongly recommended to verify the detailed parameters of your original crankshaft before purchasing.

⚙️ Product Features

High-Strength Material: Made of high-quality forged or precision-cast alloy steel, offering excellent fatigue resistance and wear resistance.
Precision Dynamic Balancing: Undergoes strict dynamic balancing tests before leaving the factory to reduce engine vibration, improving comfort and lifespan.
Precision Machining: Main journals, crankpins, and piston pin bores are high-precision ground to ensure perfect fit with bearings and pistons.
Complete Assembly: The crankshaft connecting rod assembly typically includes left and right crank webs, connecting rod, bearings, etc., ready for direct installation upon arrival.

✅ Typical Symptoms of Worn or Damaged Crankshaft Connecting Rod: Severe abnormal noises from inside the engine (such as dull knocking sounds), increased vibration, power loss, and even seizure or failure to start. If you experience these issues, the crankshaft connecting rod assembly must be inspected and replaced immediately.

⚠️ Installation Note: Replacing the crankshaft connecting rod is a major engine overhaul that requires complete disassembly of the engine. It is recommended that this work be performed by an experienced professional technician. Pay attention to crankshaft bearing clearance, connecting rod bolt torque and orientation during installation, and ensure the crankcase interior is clean and free of debris. After installation, check that the crankshaft rotates smoothly without binding.

🔧 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.