Carburetors of motorcycles Izh-Planet 5, 4, 3, Sport - from design to adjustment


These days there is an increased interest in old and time-tested Soviet hunting rifles. It's no secret that modern Russian and Western guns are significantly inferior to Soviet models in terms of quality and shooting accuracy.

View gallery The classic double-barreled shotgun produced by the Izhevsk Mechanical Plant IZH-58 16 caliber (model 1958 - 1986) is an excellent confirmation of this. To this day, this reliable weapon enjoys well-deserved popularity and authority not only among hunters, but also among people who value quality and reliability.

Historical reference

Mass production of IZH-58 16 caliber began in 1958. The development of the new model was carried out by the IzhMEKh design bureau, headed by L. N. Pugachev. A distinctive feature of the Izhevsk horizontal model from its predecessors 54 and 57 modifications was a clear technological advantage, which was expressed in the ease of assembly, and therefore in reducing the cost of the product.

The basic model IZH-58 was designed for commercial hunters and provided for the production of a model exclusively of 20 caliber. Later, after mass production of the basic product, the gun aroused great interest and popularity among hunters. It was decided to produce IZH-58 16 gauge, and then 12 gauge.

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The fame of the reliability and quality of the 58 model spread beyond the borders of the Soviet state. The gun began to be exported to more than twenty countries in Europe, North and Latin America.

Carburetor repair

When using the motorcycle for a long time, you may encounter carburetor overflow (leakage from the drain hole). First of all, it is recommended to check the fuel level in the carburetor and the tight fit of the shut-off needle. By bending the locking needle brackets in the desired direction, we adjust the fuel level (the distance from the plane of the middle of the floats to the edge of the carburetor body is 13±1.5 mm). The tapered end of the locking needle is made of rubber. If it becomes leaky, it is recommended to replace it with a new needle from the repair kit. It also happens that the floats begin to leak gasoline due to fatigue of the material. It can also be treated by replacement.

Floats

Fuel nozzles become clogged due to low-quality fuel or when dirt gets in from the air through the filter. To clean gasoline, in addition to the mesh in the fuel tap, you need to additionally cut the fuel filter into the gas hose. The air filter must be tightly connected to the carburetor. At the same time, you cannot change its design, much less install a so-called zero.

The filter element must strictly comply with the throughput recommended by the motorcycle manufacturer. Never use needles or wire to clean the jets. It is enough to wash them in gasoline and blow them with compressed air.

Carburetor K-62 disassembled.

Sometimes it happens that when starting or running a motorcycle, the carburetor sneezes. This happens due to problems in the ignition system. The first step is to replace the spark plug. If this does not help, then the ignition has failed. Usually the carburetor shoots during early ignition. Sneezing can also be caused by a mixture that is too lean. The combustion process of such a mixture is slow and when the piston opens the inlet window, the mixture shoots into the diffuser.

The main reason for a lean mixture is air leaks in the following places:

  • from under the crankshaft oil seals;
  • cylinder heads;
  • at the junction of the carburetor flange and the cylinder pipe.

We try to find and eliminate the cause of air leaks using the elimination method. You should start with inspecting and adjusting the ignition system.

New samples of the Izhevsk Mechanical Plant

In the 70s of the last century, Izhevsk gunsmiths launched the production of a modernized modification of the IZH-58M, which became a hybrid development consisting of parts and components of the IZH-48 and IZH-58 16 gauge. The overall barrel length of this series was from 720 to 730 millimeters, the weight of the modified IZH-58M model reached 3.3 kilograms. More than half of the IZH-58M guns were exported, mainly to the socialist countries of Eastern Europe.

Later, in 1977, the Izhevsk Mechanical Plant began producing the IZH-58 MA 16 caliber, in which a fuse was installed that was automatically triggered when the gun barrel was broken.

A little history

The production of guns in Belgium began in the 17th century. At first they were sold within the country, and only after some time they began to be sold abroad. At first the batches were small, but as they gained popularity they began to grow. It is known that in 1860 Belgium was able to sell weapons worth 11,891,960 francs. There are a lot of countries to which goods were exported. Russia is only in thirteenth place on this list. The top ten are headed by:

  • Chile.
  • England.
  • Prussia.
  • France.

You might be interested in: Why is there no compression in one cylinder? Checking, measuring and replacing

Belgium now also sells a large number of weapons both at home and abroad.

World recognition of Soviet gunsmiths

In 1986, Izhevsk gunsmiths stopped mass production of the IZH-58, considered the best model of hunting rifles in its class. In the same year 1986, at the International Leipzig Fair, IZH-58 was awarded a gold medal. The gun received such international recognition for its original and high-tech solution, as well as for its reliable and constructive operating solutions. Over the years of mass production of this modification, more than 850 thousand copies were manufactured.

From now on, only true connoisseurs of Soviet quality in the arms industry have such models in their arsenal. Western small arms collectors consider it an honor to have a Soviet-made IZH-58 in their collection. This once again proves the quality and reliability of the hunting rifle of Izhevsk craftsmen.

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Carburetor of Izh Planeta 3.4 motorcycles

Izh Planet-3 motorcycles were equipped with K-62P and K-36I carburetors. The latter had a unique design for its time. The throttle shape was U-shaped, which made it possible to significantly reduce the dimensions of the carburetor (in comparison with the K-28 and K-37 produced at that time). The corrector was moved out of the diffuser area and regulated not the air, but the fuel. This solution made it possible to reduce fuel consumption by 4-6% due to more stable mixture adjustment.

The mixing chamber cover was fastened with special locking springs, which made it possible to quickly and conveniently replace the throttle cable or rearrange the needle. The main fuel jet was screwed into the bottom of the carburetor next to the drain plug. To clean it, it was not necessary to dismantle the carburetor. The diameter of the diffuser of the K-36I carburetor at the outlet is 28 mm, and in the middle it is 26 mm. That is, the mixing chamber is a kind of aerodynamic profile, which has a beneficial effect on mixture formation.

Another feature of the K-36 carburetor is its operating principle, which is similar to a car carburetor. The screw for the amount of mixture in it regulates not the air, but the fuel emulsion entering behind the throttle. Due to this, the sensitivity of the carburetor settings at idle has increased. Adjustment is carried out with screw 1 for the quantity of the mixture (at an angle) and screw 2 for the quality.

The K-36 carburetor has one drawback. It is sensitive to road dust. The upper latches do not seal the lid of the mixing chamber tightly and dust particles get there, the valve begins to jam and wear out. That is why motorcycles on which such carburetors were installed (Kovrovets, Izh Planeta-3, etc.) were equipped with carburetor protective covers.

Later, new K-62 carburetors with the indices I, P, B began to be installed on the Izh Planet-3, 3-01 and 4 motorcycles. The power of two-stroke engines grew and there was a need to increase the diameter of the diffuser (now it was 32 mm), throughput jets, etc.

The new carburetor design made it possible to uninterruptedly supply the engine during sudden braking and acceleration, tilting and rolling of the motorcycle.

Setting up such a carburetor is carried out similarly to the K-68 setting described above. The quantity screw is not located on the side of the carburetor, but in the upper part.

Shotgun IZH-58 16 caliber, general description

A classic double-barreled shotgun with a horizontal barrel arrangement. All metal components and parts (barrels, blocks, couplings) of IZH-58 are made of high-quality structural carbon steel 50A. A stepped protrusion is installed on the barrel coupling, which acts as a lock to lock the gun against accidental pressing of the trigger. The internal bores and chambers are chrome plated. Triple locking of the IZH-58 is ensured by special mechanics, consisting of 2 under-barrel hooks and a bolt lever.

Design and marking

Gun stock IZH-58, 16 gauge. Like the fore-end, the stock is made of birch, and in export versions - of beech. For exclusive hunting rifles, a walnut stock with original highly artistic inlay was inserted. This design of hunting weapons was especially liked by members of the Soviet government and their Western colleagues, who were usually presented with these exclusive models.

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When disassembling the IZH-58, the model is divided into three components: fore-end, barrels and stock with stock. The manufacturer's mark is stamped on the barrel coupling, which indicates the date of assembly, the serial number of the gun, the permissible pressure in the chamber, as well as the IzhMEKH brand name.

Which carburetor is better to put on Planet 5 instead of the original one?

If desired, imported Japanese Mikuni carburetors with diffuser diameters of 30 and 32 mm can be installed on Izh Planet-5 motorcycles. Naturally, you need to select jets recommended by the manufacturer. On Planet-5, the throughput of the main fuel jet corresponds to 270 ml/min, the corrector fuel jet is 255 ml/min.

You will also need to select an adapter to connect the carburetor flange to the cylinder. You can order an adapter from a turner or select one from other motorcycle models. The inlet window of the diffuser on Mikuni is wide, so the rubber pipe for connecting to the air filter will also need to be selected.

It is important to remember that all connections must be tight, without distortions.

The diameters of the diffuser and the cylinder inlet must be the same and have no steps that prevent the mixture from entering the combustion chamber.

This is what the installed Mikuni carburetor looks like on the Izh Planet-5 motorcycle.

All of the above also applies to the installation of a Chinese PZ 30 carburetor on the Izh Planet-5 motorcycle. Its special feature is the presence of a version with an accelerator pump, which helps enrich the mixture at high engine speeds. But to use it, you need an additional cable that will work in tandem with the motorcycle’s gas handle.

With minor modifications, the carburetor flange fits well with the mountings to the cylinder pipe. An important point is that you need to install a rubber or textolite gasket between the pipe and the flange so that the carburetor does not heat up when the engine is running.

This is what the installed PZ30 carburetor looks like on the Izh Planet-5 motorcycle.

Imported carburetors are good because they do not have the usual suction. To start the motorcycle, you do not need to fill the crankcase with gasoline; you just need to open the enrichment corrector. These carburetors also have regular drain holes instead of a drain hole, which are fitted with hoses that can be taken out to any convenient place. For example, under a motorcycle engine, so that if the carburetor overflows, nothing will get dirty.

IZH-58, 16 gauge: consumer reviews

Along with the advantages of the Izhevsk gun, according to reviews from hunting enthusiasts, there are also some disadvantages identified during operation. The main one is the tight fuse. The characteristic click when the key is turned off from an accidental shot often frightens the animal, which shooters really don’t like.

For some purchased gun models (IZH-58 16 caliber), hunter reviews have complaints about a slight jamming of the ejector. Very often you have to eliminate this deficiency yourself.

But basically, the IZH-58 small arms are a reliable gun that is suitable for commercial and sport hunting. The special attractiveness of this hunting weapon is its lightness, which is an important factor. Having walked tens of kilometers in search of prey, every hunter notes precisely this feature of small arms.

When choosing between modern weapon models and the Soviet IZH-58 rifle, very often hunters choose the latter. Firing accuracy, lightness and beautiful design - these are the main components of the horizontal double-barreled shotgun IZH-58, which has served hunters for many, many years.

Adjusting the K-68 carburetor on the IZH Planet-5 motorcycle

The K-68I carburetor was installed on the Izh Planet-5 motorcycle more often than others. With proper setup and proper care, the motorcycle starts quickly, runs smoothly and without complaints.

To adjust the K-68I carburetor you will need a flat-head screwdriver, pliers, and a ruler. For clarity and ease of adjustment, use the K-68 carburetor diagram.

Algorithm for adjusting the Izh Planeta-5 carburetor:

  1. The first step is to check the fuel level in the float chamber. Unscrew the camera cover bolts with a screwdriver and remove it. Turn the carburetor over and use a ruler to measure the distance from the carburetor body to the top edge of the floats. It should be 26 ± 5 mm. If the parameters deviate, the tongue of the floats is bent in the appropriate direction using pliers. At the same time, in no case should the parallelism of the floats be disrupted.
  2. Set a gap of 2 mm between the throttle valve and the bottom of the mixing chamber by adjusting screw 11. Then check the position of the throttle needle. The required needle position is the middle groove. The remaining grooves are made to move the needle lock and adjust the appropriate fuel quality depending on climatic conditions.
  3. After all the above steps, we proceed to the most important stage - setting the idle speed. The idle quality adjusting screw 15 (located vertically on the left side of the carburetor) is screwed in until it stops, and then unscrewed 1-1.5 turns. Start the engine and warm up for 5 minutes. Using the mixture quantity adjustment screw 11 (located horizontally on the left side of the carburetor), we set the minimum stable engine speed. At the same time, slowly unscrew screw 15 until the engine speed stops increasing. It is the moment of reducing the crankshaft speed that will be optimal for determining the position of the adjusting screw 15. We again reduce the engine speed with screw 11 and unscrewing screw 15, we find a new optimal position of the throttle valve. This operation must be repeated until the minimum, but at the same time stable, engine crankshaft speed is established.
  4. By sharply turning the throttle lever at idle, we check the correctness of the adjustment (the quality of the mixture). If, when the throttle is opened sharply, the engine stalls or picks up speed poorly, screw 15 needs to be tightened a little, thereby enriching the mixture. If the engine stalls when the throttle is closed, screw 15 should be unscrewed slightly.
  5. You can also check the correctness of the adjustment by the color of the central insulator of the spark plug. After adjusting the carburetor, drive a motorcycle for a distance of 5-10 km and remove the spark plugs from the cylinder head. Dark carbon deposits indicate that the mixture is too rich. A light color (whitish or sandy) indicates that the mixture is poor. The normal recommended candle color is brown or brick.
  6. It is also worth remembering that the free play of the throttle cable is 1-3 mm. If it is not there, the throttle adjustment will be incorrect. The free play is set by adjusting a special bolt located under cap 18.

The video below clearly shows the adjustment of the K-68I carburetor on the Izh Planet-5 motorcycle.

Technical description of the Soviet model

IZH-58, 16 gauge, characteristics and technical data of the gun:

  • Manufacturer: IzhMekh (Izhevsk Mechanical Plant).
  • Barrel length: 730 mm.
  • Gun weight: 2.7-2.9 kg.
  • Constriction (left barrel) muzzle: choke.
  • Constriction (right barrel) muzzle: pay.
  • Automatic safety device against accidental pressing of the trigger.
  • Pistol neck.
  • Stock: birch, beech.
  • Material: 50A steel.
  • Internal chrome plating of barrel and chamber.
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