The situation when your favorite scooter suddenly loses traction, familiar to many owners of the equipment AntYesterday, the unit was sliding up a hill, and today it can barely accelerate to 40 km / h even on a flat road, and this behavior of the equipment is not just an inconvenience, but a signal of serious malfunctions in the operation of the engine or transmission that require immediate intervention.
Before you panic and look for a service center, you need to conduct an initial diagnosis, most often the problem lies in a banal clog of the fuel system or a violation of the settings. carburetorBut ignoring the symptoms can lead to a major repair of the engine, and in this article we will discuss in detail all possible causes of power loss and how to eliminate them on their own.
It's important to understand that a scooter is a complex mechanism where all the nodes are interconnected. Ignition problems can mimic symptoms of poor compression, and wear on the CVR belt is often confused with engine malfunction. A critical factor in the loss of traction in 80% of cases is a violation of mixture formation or power leakage in the transmission. Let's get into the order of things.
Testing of fuel system and mixture quality
The most common reason why Ant Two-stroke engines are extremely sensitive to the quality of gasoline and the correct mixing with oil, and if you haven't changed the fuel in the tank in a long time or used old gasoline, it could lose its octane properties and coke the channels.
Be sure to check the status fuel-filter Even a microscopic crack in the pipe can suck in excess air, depleting the mixture, which leads to overheating of the piston group and a sharp drop in power. Visually examine all the connections from the tank to the carburetor.
Use only fresh AI-92 or AI-95 gasoline and a special two-stroke oil labeled JASO FC or FD. Mix them in the proportion specified in the instructions for your engine, usually 1:40 or 1:50 for modern oils.
Carburetor cleanliness is the key to a stable operation, and if the jelly is full of dirt or tar deposits, the engine simply "chokes"; especially the main fuel jeekler, which is responsible for operating at full speed, suffers from this, and its cleaning often returns the scooter to its former frolicity.
Diagnostics of air filter and intake tract
Fuel combustion requires air, and if it's limited, what kind of thrust can we talk about? Clogged. air-filter Dust, down and dirt create a dense plug through which the motor cannot breathe in full air.
Remove the filter case and assess its condition. If it's paper and blackened, it's better to replace it. Fur filters can be gently washed in gasoline or a special cleaner, but only if they have not lost their structure. After washing, the filter should be slightly moistened with oil, but not covered tightly.
- 🔍 Visually inspect the intake corrugated for cracks and scuffs.
- 🌬️ Check whether the carburetor valve is free when pressing the gas.
- 🧹 Make sure there are no foreign objects or nests of insects in the pipe.
Don't forget the intake manifold is tight, and if the gasket between the carburetor and the cylinder is burned or cracked, the unaccounted air is sucked in, and it disrupts the mix, making it too poor, causing detonation and loss of traction, and it's inexpensive to replace the gasket, but the effect is noticeable immediately.
Status of piston group and compression
If the fuel and air are all right, you should look inside the engine. Compression The low compression means that the gases break past the piston, and the energy from the explosion does not push the crankshaft, but goes into the crankcase or exhaust.
You'll need a compressometer to measure it. Roll it in the candle hole and swivel it with a kick starter or starter. For two-stroke scooter engines, compression in the 8-10 atmosphere range is normal. If the device shows 6 atmospheres or less, the engine requires a bulkhead.
⚠️ Attention: If the compression fell sharply, perhaps piston rings or bullies on the cylinder, operating the engine in this condition will cause the piston to crumble and penetrate the cylinder wall, after which repair will become economically impractical.
It's also worth assessing the state of the exhaust system: the inhalation in the cylinder exhaust window and in the silencer ("pants") makes it much harder to get out of the exhaust gases, the engine operates in stuffy conditions, can not blow efficiently and, as a result, does not pull. Cleaning the silencer from the incense is a procedure that should be done regularly.
Setup of the carburetor and ignition system
The right adjustment of the carburetor is the art of balance. If the screw of the quality of the mixture is twisted too much, the mixture will be poor, and the engine will stall or warm up. If you twist it too much, the mixture is rich, the engine choked with gasoline, black smoke comes out of the pipe, and there is no traction.
Optimal adjustment is achieved by selecting the jigsawlers and the position of the needle. The needle in the stool has several positions (clips). When you lift the needle, you enrich the mixture at medium speeds, lowering - impoverishing. For each mode of operation (idle, middle, full gas) there is a carburetor element.
☑️ Checking of the ignition system
And the spark plug, too. The color of the charcoal on the electrode tells you more about the engine than any appliance, the white coating tells you about overheating and poor mix, the black and velvet color tells you about rich, and the brick and brown color tells you about the perfect work, and check the gap of the candle, which should be 0.6-0.7 mm.
Diagnostics of the variator and transmission
It's often the engine roars, the engine gains momentum, and the scooter is barely moving, which is a sure sign of problems in the transmission, namely the CVT. Variator. It's a Klinorene transmission that automatically changes gear ratio, and if the belt is worn, stretched, or slipped, the engine power is not transferred to the wheel.
Take the CVT cover off and inspect the belt. It should be dry, without cracks and fringes at the edges. If the belt is normal, it falls deeper into the pulleys, and the CVT can't get to maximum gear. Also check the status of the rollers: if they flatten or have a production, the CVT will work in jerks.
| Climatizer element | Symptom of wear and tear | Decision |
|---|---|---|
| Drive belt | Cracks, fringes, slippage | Replacement with a new original |
| Georgians (clips) | Flatting, uneven wear | Replacement of the kit |
| Torque Driver Spring | Drawdown, loss of elasticity | Replacement or installation of reinforced |
| Scooter brushes | Sparkling, loss of contact | Cleaning the collector, brush replacement |
Pay special attention to the spring of the tork driver (driven pulley). Over time, the metal "gets tired", the spring becomes softer and compresses the belt worse. As a result, on the rises, the belt slips, and the speed drops. Installing a stiffer spring (for example, +15% or +20% to the drain) often solves the problem of traction on the uphill.
The secret of setting up the variator
Installing rollers of less weight (for example, 5 grams instead of 6) will accelerate acceleration, but reduce the maximum speed. Heavy rollers will increase the maximum speed, but will worsen the acceleration dynamics. Experiment with weights within +/- 1 grams from the runoff.
Effect of exhaust system on power
The exhaust system of a two-stroke engine is not just a pipe for exhausting gases, but an important resonance tool: the shape of the pants, the length of the resonance chamber and the state of the throughput channels directly affect the power, and if the muffler is filled with scorching, the engine operates with great resistance.
There's a myth that removing the silencer will add power, and on two-stroke engines, it often backfires, and the resonance disappears, the mixture goes downhill, and the motor loses traction at medium speeds, although it can sound formidable at the top, and it drastically reduces the life of the piston.
If the regular muffler is too choking the engine, it makes sense to consider installing a tuning resonance exhaust designed specifically for your cylinder model, but for a stock engine, the best strategy is to clean the regular system of coke.
Frequently Asked Questions (FAQ)
Why does the Ant scooter stop when the gas is opened abruptly?
It is likely that the accelerator pump is not set up (if any) or that the mixture is too poor in transition modes, and the main fuel jeekler or a clogged air filter can be the cause, which prevents the engine from gaining speed quickly.
Could bad oil be the cause of power loss?
Yes, using cheap mineral oil or misalignment (too much oil) causes increased nagaroprosmulation, so nagar clogs the exhaust window and silencer, which reduces compression and power, and bad lubrication causes overheating and bullies.
How often should you clean the carburetor on the scooter?
It is recommended to carry out preventive cleaning and purge of the carburetor once a season or every 3-4 thousand kilometers of run. When using low-quality fuel, the procedure should be frequented up to twice a season.
Does the pressure in the tires affect the thrust of the scooter?
Deflated tires create a huge rolling resistance, and the engine spends a lot of power just to overcome the friction of the soft tires against the road, causing acceleration dynamics and top speed to fall.
What if after cleaning the carburetor, the scooter began to work worse?
It is likely that the settings were broken or the jellyplates were installed incorrectly, check if all screws are twisted to the end (without fanaticism), if the needle in the stool is correctly located and all gaskets are sealed together, and you may need to re-adjust the idle.