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The 125cc yx engine is a common engine in many motorcycles, also called the bike engine. The 125cc yx engine is the first entry-level engine for many riders. The engine is well-known and popular in many countries, especially in Europe, because of its fuel efficiency and low running cost.
Air-cooled 125cc yx engine:
The Air-cooled 125cc yx engine uses air as its cooling medium. It has cooling fins that increase the surface area for heat dissipation. The engine is the simplest in design and has lower manufacturing costs. It is lightweight and requires no additional cooling equipment. The air-cooled 125cc yx engine is popular in small motorcycles and scooters.
Water-cooled 125cc yx engine:
The Water-cooled 125cc yx engine uses water as its coolant. It has a water jacket where water circulates to remove heat from the engine. The engine also has a pump that circulates the water and a radiator where the water is cooled before returning to the engine. The water-cooled 125cc yx engine has a compact design. It maintains a consistent temperature, which enables the engine to run efficiently.
Oil-cooled 125cc yx engine:
The Oil-cooled 125cc yx engine uses engine oil as its coolant. The engine has cooling channels where the oil circulates to absorb heat from the engine components. Then the heat is dissipated through cooling fins or a heat exchanger. The oil-cooled 125cc yx engine has good heat transfer properties because oil can carry heat away from the engine parts effectively.
Electric 125cc yx engine:
The Electric 125cc yx engine is a yx engine variant that uses electricity to power the engine. The electric 125cc yx engine has seen innovations and developments in recent years to improve its performance, reliability, and efficiency. The engine has a simple and efficient mechanism, with fewer moving parts.
Below are the general specifications and maintenance practices for the 125cc yx engine
Engine Specifications
The 125cc YX engine has the following specifications:
Displacement: 125cc
Cylinder configuration: Single-cylinder, vertical, four-stroke
Bore x Stroke: 52mm x 55mm
Compression Ratio: 9.0:1
Maximum Power Output: 8.5 hp (6.2 kW) at 8,000 rpm
Maximum Torque Output: 9.5 Nm (7.0 ft-lb) at 6,000 rpm
Fuel System: Carburetor, 18mm
Ignition System: CDI (Capacitive Discharge Ignition)
Cooling System: Air-cooled
Lubrication System: Wet sump
Starting System: Kick start
Transmission: 4-speed, constant mesh
Final Drive: Chain, 428 pitch
There are various ways to maintain the 125cc yx engine, and they include the following:
Engine Oil
Regularly check the engine oil level and change the oil and oil filter as per the recommendations in the owner's manual. YX 125 engine owners should use the recommended engine oil.
Air Filter
Regularly check the air filter and clean it or replace it if worn out. A clean air filter prevents dirt and debris from entering the engine, which ensures optimal engine performance.
Fuel System
Use fresh fuel as recommended in the owner's manual. YX 125 engine owners should avoid using stale or contaminated fuel. Additionally, owners should regularly check the fuel lines for leaks or damage and replace them if damaged.
Spark Plug
Check the spark plug regularly for wear and tear or damage. If there is damage, replace it. Also, ensure the spark plug gap is set to the manufacturer's specifications.
Cooling System
Check the cooling system components like the radiator and hoses for wear and tear. If there is damage, replace them. Also, ensure the cooling system is filled with the recommended coolant level.
Clutch and Transmission
Regularly check the clutch and transmission components. YX 125 engine owners should adjust the clutch cable and lever free play as per the recommendations in the owner's manual.
Wheels and Tires
Check the wheel spokes and tighten them if loose. Also, adjust the wheel bearings and axle spacers to ensure they are in good working condition.
Frame and Suspension
Check the frame and suspension components and the YX 125 bike's accessories for wear and tear. If there is damage, replace them. YX 125 engine owners should also clean and lubricate the suspension components periodically.
Electrical System
Check the electrical system components, such as the battery and wiring, for wear and tear. If there is damage, replace them. Also, keep the battery terminals clean and tightened and ensure the battery is charged as required.
Regular Maintenance Schedule
Follow the manufacturer's recommended regular maintenance schedule. YX 125 engine owners should perform regular maintenance tasks like oil changes, air filter cleaning, spark plug inspection, valve clearance adjustment, and other minor repairs as needed to keep the engine running smoothly and in good condition.
Before buying a
Understand the needs
Before buying a 125cc YX engine, buyers need to understand their needs. Do they want an engine for a pit bike or for racing? For a daily commute or weekend adventures? Understanding the needs will help to narrow down the options.
Consider the budget
YX engines have different price points depending on the model and specifications. Before buying an engine, set a budget and stick to it. Don't forget to consider the long-term maintenance costs when planning the budget.
Check the specifications
Not all YX engines have the same specifications. Some engines have more power and torque than others. Some engines have better fuel efficiency than others. Before buying an engine, check the specifications and choose what suits the needs.
Consider the brand
There are many brands that offer YX engines. YX engines are known for their durability and reliability. Before buying an engine, research the different brands and choose a reputable one.
Read reviews
Before buying a YX engine, read reviews from other buyers. Reviews will give an insight into the performance and durability of the engine. They will also help to know what to expect from the engine.
Here is how to DIY and replace 125cc YX engines.
After completing the steps, the 125cc YX engine will be replaced successfully.
Q1: Can I upgrade the 125cc YX engine to get more power?
A1: Yes, the 125cc YX engine can be upgraded. Adding a larger air filter or intake system is one way to do this. A new exhaust system can also help. Replacing the stock carburetor with a larger one will provide extra fuel. These upgrades work together to give more power.
Q2: How often should I change the oil on a 125cc YX engine?
A2: Changing the oil every 3 months or after 1,000 kilometers of riding is recommended. Using fresh oil keeps the engine parts lubricated. The oil also removes dirt and debris that builds up over time. Regular changes are important for engine health.
Q3: Can I use my 125cc YX engine dirt bike on the road?
A3: Some areas allow bikes with 125cc to YX engine codes to ride on roads. However, check local laws first. Bikes must meet certain standards, like having working lights and signals. Tires also need enough tread for pavement. Legally registering the bike is required in most places.
Q4: Is water cooling better than air cooling for the 125cc YX engine?
A4: Water cooling systems handle high heat better than air cooling. If the bike will be ridden in hot conditions for long distances, water cooling is best. Water coolers also maintain a steady engine temperature. For most trails and short rides, air cooling works fine and is simpler.
Q5: Can I modify the 125cc YX engine for more top speed?
A5: Yes, but changes should be done carefully. Replacing the engine's sprockets can improve acceleration or top speed. Adding a performance exhaust system helps the bike go faster. Modifying the carburetor gives more power. Too many mods can make the engine run poorly.