125cc engine for sale

Types of 125cc Engine For Sale

There are several types of 125cc engine for sale that buyers should know about, including:

• Air-Cooled 125cc Engines

  Air-cooled 125 cc engines use fans and airflow to cool the engine. The engines are lightweight, low-cost, and simple, making them great for scooters and mopeds. However, they are more likely to overheat in traffic, and the temperature must be monitored.

• Water-Cooled 125cc Engines

  Water-cooled 125 cc engines circulate coolant through the engine and use a radiator to remove heat. This allows for more power and less overheating. The engines are good for motorcycles that go fast and need consistent power, but they are heavier and more complex.

• Two-Stroke 125cc Engines

  Two-stroke 125cc engines fire once every two crankshaft rotations, providing more power and higher RPMs in a smaller, lighter package. They are suited for off-road bikes that need quick acceleration and high revs. However, they pollute more and have a narrower power band.

• Four-Stroke 125cc Engines

  Four-stroke 125cc engines have an intake, compression, power, and exhaust stroke cycle in four crankshaft rotations. This results in smoother power delivery, better fuel efficiency, and lower emissions, which makes the engines suitable for road bikes and scooters. But the engine tends to be heavier and less powerful for the displacement.

• Single-Cylinder 125cc Engines

  Single-cylinder 125cc engines have one piston, making them simple and lightweight. They are used in most scooters and entry-level motorcycles. The engines provide a good balance of power and efficiency but can vibrate a lot.

• Parallel Twin 125cc Engines

  Two cylinders side by side make up parallel twin 125cc engines. They run smoother than single-cylinder engines, which makes them good for longer trips. The engines are more complex and heavier than single-cylinder engines.

• Electric 125cc Equivalent Motors

  Instead of internal combustion engines, some 125cc equivalent bikes are electric. They have instant torque and need little maintenance. However, they rely on battery technology, which is developing, and charging ranges can be limited.

Specifications and maintenance of 125cc engines for sale

• Engine size

  It refers to the total volume of all the cylinders in the engine. The 125cc engine has cylinders with a total capacity of 125 cubic centimeters, which is equivalent to 0.125 liters. This engine size is common in small motorcycles, scooters, and mopeds.

• Firing order

  There is no specific firing order for 125cc engines because they have different configurations. The firing order for a specific 125cc engine is determined by the engine design. It is defined in the service manual or by a mechanic.

• Cylinder arrangement

  125cc engines have a single-cylinder or a 2-cylinder inline configuration. In the 2-cylinder engines, the 2 cylinders are arranged side by side in a line.

• Engine type

  125cc engines are commonly used in petrol or gasoline-powered vehicles. However, there are also some 125cc engines that use diesel or alternative fuels like ethanol and biodiesel.

• Cooling system

  The 125cc engine uses either an air-cooling or liquid-cooling system. The air-cooled engine uses airflow over the engine's surface to dissipate heat. On the other hand, the liquid-cooled engine has coolant that circulates through the engine, carrying the heat away to a radiator.

• Starting system

  125cc engines use either an electric starter or a kick starter. The electric starter is more common because it is easier to start the engine with a button press. The kick starter requires the operator to kick a lever to start the engine, which is a traditional method of starting the engine.

• Ignition system

  The engine has an ignition system that uses either a coil and a spark plug or a capacitor discharge ignition. The coil and spark plug are the most common ignitions in 125cc engines. They provide a spark to ignite the air-fuel mixture in the engine's combustion chamber.

Engines with 125cc power require regular maintenance so that they can run smoothly and efficiently. The following is some general maintenance practices that ensure the 125cc engine stays in good condition:

• Oil change: The engine oil should be changed regularly according to the manufacturer's recommendation. The oil level should be checked using the dipstick and topped up if necessary. Old oil should be drained before a new one is added.
• Air filter: The air filter should be cleaned or replaced regularly. This prevents dirt and dust from entering the engine and clogging it, ensuring that the engine runs smoothly.
• Spark plug: The spark plug should be inspected and cleaned or replaced if damaged. The spark plug gap should be checked to ensure it meets the manufacturer's recommendations.
• Fuel system: The fuel filter and fuel lines should be checked for damage. The fuel lines should be replaced if cracked or worn out, and the fuel filter should be changed according to the service interval.
• Cooling system: The coolant level should be checked and topped up if necessary. The radiator and hoses should be inspected for leaks, and the coolant should be replaced according to the manufacturer's schedule.
• Wheels and tires: The tire pressure should be checked and adjusted according to the specifications. The tires should be inspected for wear and replaced if worn out. The chain should be lubricated and adjusted to the correct tension.
• Brakes: The brake pads should be inspected for wear and replaced if necessary. The brake discs should be checked for damage, and the brake system should be bled to remove air if necessary.
• Electrical system: The electrical system should be checked, including the battery, lights, and switches. The battery terminals should be cleaned, and the battery should be tested for proper voltage.
• General inspection: The 125cc engine should be inspected for any loose bolts, nuts, or screws. All the fasteners should be tightened, and any damaged or worn-out parts should be replaced promptly.

How to choose 125cc engine for sale

There are several factors to consider when choosing a 125cc engine for sale, including:

• Purpose

  It is important to determine the intended use of the vehicle. For commuting and running errands, focus on reliability and fuel efficiency. If planning to carry cargo or passengers, consider an engine with a higher power output.

• Brand and supplier reputation

  It is important to research various brands and read user reviews to understand the engine performance, durability, and after-sales service. Look for a brand with a good reputation and reliable customer support.

• Budget

  Setting a budget is important before shopping for a 125cc engine. Consider the engine's initial cost, fuel efficiency, maintenance requirements, and insurance costs. Sometimes, spending more on a quality engine can save money in the long run.

• Fuel efficiency

  When choosing a 125cc engine, consider fuel efficiency. The engine should have high fuel efficiency to save costs. Check online reviews and comparisons to understand the engine's fuel consumption in real-life conditions.

• Maintenance and reliability

  It is important to choose an engine known for its reliability and requires less maintenance. Research user reviews and expert reviews to understand the engine's durability. Also, choose an engine with easily available spare parts for convenient maintenance and repairs.

• Comfort and features

  Consider the engine features, including the vehicle's seating comfort, suspension, and additional features like storage space, electric start, or ABS brakes. Choose an engine that meets the comfort and convenience needs.

• Test drive

  Before deciding, it is important to test drive different vehicles with the desired engine. The test drive helps understand the engine's performance, comfort level, and handling characteristics.

• Warranty and after-sales service

  When choosing a 125cc engine, consider the warranty and after-sales service. Choose an engine with a long warranty period and reliable after-sales service to support and assistance in case of problems.

How to DIY and Replace 125cc Engine for Sale

Replacing a 125cc engine with a new one can be a complex process. It requires a good understanding of mechanics and the right tools. Here is a DIY guide on how to replace a 125cc engine.

Before starting, ensure that the new engine is compatible with the existing engine.

• Tools Required: Socket set, Wrench set, Screwdriver set, Pliers, Torque wrench, Engine hoist or stand, Safety gear (gloves, goggles), Oil and filter (for new engine), Gasoline or appropriate fuel, Electrical connections (for starting system), Cooling system components (radiator, hoses, etc.), Exhaust system components, Service manual for the specific vehicle (for reference).
• Steps: 1. Disconnect the battery. 2. Drain the oil and coolant. 3. Remove the engine's cooling system. 4. Disconnect the exhaust system. 5. Disconnect the engine from the chassis. 6. Remove the old engine. 7. Install the new engine. 8. Reconnect the electrical system. 9. Reconnect the cooling system. 10. Reconnect the exhaust system. 11. Reconnect the engine to the chassis. 12. Refill the engine with oil and coolant. 13. Reconnect the battery.

Q and A

Q1: What is the difference between 2-stroke and 4-stroke 125cc engines?

A1: The main difference between the two engines lies in their stroke and cycle performance. For the 2-stroke engine, every stroke of the piston is responsible for completing an intake and exhaust cycle. This means that, with every revolution of the crankshaft, a piston moves up or down twice. As a result, 2-stroke engines produce more power and are much simpler in design. On the other hand, 4-stroke engine cycles complete intake, compression, power, and exhaust in four strokes (two crankshaft revolutions). This makes 4-stroke engines more efficient, cleaner, and quieter, but with a more complex design.

Q2: How many kilometers can a 125cc engine last?

A2: There is no specific number of kilometers that a 125cc engine will cover. The distance covered by a 125cc engine will depend on various factors, such as the riding style, engine maintenance, and terrain.

Q3: Is a 125cc engine good for long-distance travel?

A3: A 125cc engine can handle long-distance travel, but with some limitations. For instance, riders should avoid high-speed performance on highways. This is because the engine is optimized for speed, and prolonged high-speed riding can cause overheating and damage to the engine.