K-62 carburetor: specifications, adjustment, tuning, diagram, photo

2024 Author: Erin Ralphs | [email protected]. Last modified: 2024-02-19 11:42

There are many motorcycles, but none of them can work without a carburetor and its correct setting. It is a device for mixing gasoline with air, and depending on the proportion and quantity of both, the correct and economical operation of the engine is carried out.

Carburetor device

Our element is designed in such a way that gasoline enters the float chamber, up to a certain level, which is limited by the float. He, rising, closes the passage for fuel with a locking needle.

Then the fuel enters the mixing chamber through the jet, where it mixes with air and enters the cylinder under the action of thrust, when the piston is lowered down. The performance of the engine depends on the quality of the mixture.

The scheme of the K-62 carburetor should be known to everyone who is going to work with this device.

An important function is played by jets, they play a major role in the amount of fuel supplied to the engine. It is possible to install different jets on the K-62 carburetor. Its technical characteristics allow it to work perfectly on smaller jets with low fuel consumption.

Depending on the quality of the mixture, we either get a powerful but uneconomical engine, or a motor without good torque. In the case where there is a strong deviation in one direction or another, the engine cannot work normally.

Troubleshooting

If you have difficulty, for example, the engine does not start when there is a spark and we are sure that the compression in the engine is sufficient, you can moisten the spark plug with gasoline or fill the cylinder with fuel through the spark plug hole and try to start, this will help clear the strokes in the carburetor and clogged jet.

If the engine does not start, you can try to start it by pushing the motorcycle in neutral with the ignition off. When the speed is stable and the motorcycle has gained sufficient momentum, turn on the ignition, depress the clutch, move the shift pedal to the 1st speed position and slowly release the left lever on the handlebar.

If the engine starts, but stalls when the throttle is suddenly raised or lowered, it is unstable at idle, then the carburetor should be carefully examined

Carburetor inspection

Before removing a mechanism such as the K-62 carburetor from the engine, you should press the float drowner button and make sure that fuel enters the carburetor (gasoline should exit through the hole under the button), and the cause of poor performance is exactly in the carburetor.

If gasoline is slowly entering the float chamber, then a clogged filter in the gas valve may be the cause of the poor performance of the carburetor. It is enough to unscrew the sump glass(cylindrical container with a screw at the bottom), it is clearly visible on all gasoline valves in motorcycles, and clean the filter.

The K-62 carburetor may not work well due to untimely addition of liquid to the oil air filter or its clogging. You should try to start the engine without a filter, if the work becomes better, then it should be cleaned and washed in kerosene.

Disassembling the carburetor

Disassembled K-62 carburetor photos in our article allow you to consider in detail.

We will need the following tools: minus screwdriver, keys for 12, 14, hex head for 6 or pliers. You must first unscrew the screws securing the carburetor to the engine with a 14 key, then the top cover with a screwdriver. From the throttle, from the groove, the accelerator handle cable and the idle speed adjustment screw, which has a flat end, are removed.

Then we unscrew all the bolts, including the mixture quality screw, and remove the float chamber cover, it is fastened with two screws - one on the left side of the cylinder, there is also a float drowner button, a mixture quality screw and a fuel supply hose; the other with the opposite.

Turn the carburetor upside down, inspect the float, its end should be a few degrees higher than the beginning. There should be a tongue at the base, if the float is not set correctly, you should bend it to achieve the desired effect.

Disassembly of jets

First, we take out the float axis, look at the wear, it shouldbe the same throughout. We take out the needle with the lock from the float, it should have a small silicone gasket. Then we unscrew the main central jet with a 12 key, after which the idle jet is unscrewed with a 6 head or pliers, it is fixed with a lock washer.

It is important to tighten the smaller jet when assembling with a lock washer, otherwise it will break. The K-62 carburetor is produced without an enricher, they go on brands starting from K-33 and up to K-38, where it is located in the corner and is unscrewed with a screwdriver.

After unscrewing the jets, the central element is removed from the reverse side - the guide flap, which was held by the main jet. For better performance, the throttle body and center piece can be sanded. If the inspection is not for urgent installation on the engine, then all components must be lubricated with oil. Assembly is done in reverse order.

Buying a new carburetor

When buying a repair kit for the K-62 carburetor, you should pay attention that the holes are free of defects, and it is advisable to immediately select or replace the jets. Often there is a discrepancy between indications and actual hole sizes, especially if the jet is made in China.

The K-62 carburetor may well work with a jet from the K-55 brand, they are installed on Voskhod motorcycles, as practice shows, it does not particularly affect the engine, but with careful driving, more economical fuel consumption and less engine overheating.

When installing a carburetor on new motorcycles, an adapter may be required, it is quite suitableeven machine, you need to plug the extra hole, it can be clearly seen in the photo below.

But you should take into account the dimensions of the seats back in the store, it is advisable to take the carburetor with you as an example, because the standards may differ, and we will have to go back.

Flushing the carburetor

K-62 carburetor jets look at the light, in case of clogging, you can clean it with a match, but with non-metallic wire. Rinse all holes and the cover of the float chamber with a special solution.

There is a special spray can with a thin nozzle, it is best to clean the carburetor with it. Partial disassembly is done, jets are left, and the mixture provides instant cleaning and purging of all channels.

It is necessary to rinse and wipe the top and bottom covers well. Heavily contaminated carburetors can be washed in kerosene, then blown through with a compressor and finally cleaned with a spray can.

Assembling the carburetor

On top of the needle, set the latch to the middle position, if economical work is needed - to the bottom. The engine will start poorly, but will become more economical. We insert the throttle valve with a cutout to the air filter. It should move easily and freely along the slide gate.

After pre-setting the position of all elements, selecting a jet, cleaning all channels, screw the carburetor to the engine with a 14 key, connect the hose, cable (from the throttle) to the damper,tighten the mixture quality screw, which is near the gas hose, until it stops, and unscrew it by 2-3 turns.

Tighten the mixture amount screw to the maximum, the damper rests on it when raised, it must be inserted into the groove, next to the throttle cable. There is also an enrichment adjustment, it can either be attached to the carburetor, or the cable from it can go to the steering wheel. The enricher is a needle that opens an additional channel with fuel.

Starting the engine after installing the carburetor

Should open the enricher about 1 cm, press the button of the float sinker, gasoline should seep through the hole a little, then turn on the ignition, the light should be bright, and add some gas, press the kick starter several times.

If the engine starts lazily and immediately stalls, the reason is either the quality of gasoline or a weak battery. In the case when the engine does not start at all, you should inspect the main wires and the spark plug, it could be flooded with excess fuel, you should unscrew it and wipe it.

To check the spark plug, you need to attach it to the cylinder, turn on the ignition and press the kick starter, the spark should be strong and jump with the same force after the exact time.

Engine tuning

How to adjust the K-62 carburetor for normal operation? First, after starting the engine, spin the enricher. Further, the K-62 carburetor is adjusted using two screws - the quality and quantity of the mixture. Gently gradually tighten the quality screw each time a quarter of a turn, to the minimum stableengine running.

After that, repeat the same procedure with the quantity screw, carefully unscrew it until the engine starts to pick up speed, and then tighten the screws in turn to the smallest stable speed. The correct setting of the K-62 carburetor occurs not according to the instructions, but according to the operation of the engine.

Factory settings and recommendations say that the quality screw should be unscrewed exactly one and a half turns, this is not always the case in practice, because engines have different wear and compression, which cannot but affect the carburetor, so adjust need for the minimum stable engine speed.

The K-62 carburetor is adjusted on a well-heated engine. It is important to ride a motorcycle for a certain distance so that the engine warms up well along with the carburetor and the entire system. Then we reduce the gas to idle and begin to re-adjust in the same way. This will provide excellent engine tuning, minimal fuel consumption with good traction.

How to adjust the K-62 carburetor?

It is especially important to warm up the engine well on the move when installing new parts on the carburetor or for fine and final tuning. If you do not adjust the carburetor on a well-warmed engine, it will not work properly.

The engine will not produce enough power when the throttle is suddenly raised, or the gas consumption will be too high and the engine will overheat. This is possible even if the setting is done correctly, but not well.warm engine.

Then you should feel the crankcase under the cylinder, it should be warm, but not hot. Some try the cylinder, this is a mistake, you can determine the normal heating of all internal parts only by touching the crankcase.

After sufficient warm-up, you should repeat the adjustment of the screws, the speed should be minimally stable, otherwise the engine will overheat, and it should not randomly stop after a while.

The K-62 carburetor, despite some negative reviews, has proven itself quite well in practice. Its unpretentiousness, reliability and ease of operation won the hearts of many motorcycle owners. It is quite competitive compared to many foreign analogues and more modern models.