Ural with One Carburetor Fuel Consumption • Owner Reviews

In order for the iron horse to take less fuel, you need to resort to certain tricks related directly to the bike’s fuel system. Almost anyone can do this. It doesn't take much intelligence to disassemble a domestic carburetor. And foreign versions of fuel supply elements are not considered the most incomprehensible in design. This even applies to Japanese spare parts and components.

You can reduce carburetor fuel consumption by replacing its miniature elements - jets. This applies, first of all, to the domestic system.

Note that almost all bike models can be made more economical. Java, Izh Planet or Jupiter, domestic bikes with a four-stroke engine, Voskhod and even Minsk - everything will “eat” less gasoline if you install new types of carburetors. It is still worth remembering that not all spare parts and fuel units are interchangeable.

Sometimes an old, power-hungry bike that was released after World War II is not capable of running on modern foreign (for example, Chinese) carburetors.

Gearbox tuning

As we can see, many types of carburetors of different series were installed on Ural motorcycles. Everyone has their own advantages and disadvantages. The best domestic option was and remains the K-68, due to its efficiency and resistance to wear. But craftsmen went further and began installing car mono carburetors, imported motorcycle vacuum or wiper carburetors with an accelerator pump on their motorcycles. Fuel consumption decreased even more, power dropped somewhere, but acceleration dynamics became better. Which carburetors to install on your Ural is up to you to decide.

We reduce weight

We are, of course, not talking about the driver’s dimensions, although every kilogram adds fuel consumption to a motorcycle. Light clothing (but not at the expense of safety), and less load with unnecessary things will reduce the amount of gasoline consumed. If you ride around the city on a cruiser, but still haven’t unloaded the panniers after a long trip, do this, and the bike will reduce your appetite a little. You should also not carry empty cases with you, as they reduce the streamlined nature of the equipment. Take them off before your next camping trip.

Which carburetors are better to put on a Ural motorcycle?

Of all the domestic motorcycles, it was the heavy Urals and Dniepers that motorcyclists fell in love with. They were mainly valued for their engine - a boxer, four-stroke, two-cylinder, with a large volume that gave the rider an indescribable sensation. Alas, the engines were very unique and demanding. In order to move carefree on your horse, you either had to be a good mechanic, to know all the nuances of the engine in order to set everything up properly, or you could approach the problem from the other side, getting rid of its source. In this article we decided to look at how to install one carburetor on a Ural motorcycle? You might also be interested in the article: Ural motorcycle tuning.

It's not a simple procedure, but it saves you hours of agony trying to synchronize two carburetors. To make it more clear how difficult this task is, the owners of Ural and Dnepr compare it with trying to synchronize two mopeds standing next to each other. In comparison, installing and servicing a single carburetor is a simple task, which has a number of other advantages, such as fuel economy, lighter throttle control and the ability to install a set of handles on one cable. But let's look at the whole procedure in order.

We do not skimp on the quality of gasoline

Paradoxically, an expensive flammable liquid will reduce costs. The high octane number ensures gradual and complete combustion of gasoline and minimizes emissions. This means that all the fuel spent on the motorcycle will go to a useful purpose, and the money spent will not fly out into the exhaust pipe. Fuel saving additives have become especially popular lately. Their selection and use should be approached with extreme caution.

22↑ Reply from PATRIOT 31-10-2012 14:04:55 © Second stage

And then, so that you can install an energy source in front of the engine and get rid of oil leaks from under the oil seal and the ever-howling drive gears. Mixing chamber diameter, mm 32; Diffuser diameter, mm 30; Throughput, mlmin GTZh 260 idle metering tube 50 fuel corrector jet 255 Ambient temperature range at which the engine starts and stable operation is ensured in all operating modes from -20C to 50C.

Ural car: fuel system and adjustment of uniform fuel supply

Subsequent adjustment should be performed according to the following algorithm:

1. Bring the governor control lever into contact with the minimum idle speed bolt. At 450-500 rpm, use the rocker screw to set the rack's power reserve, which is 0.5-11 mm after the feed is completely turned off.
2. Bring the control lever to full contact with the maximum speed bolt, using this bolt to set the start of the rack ejection at a pump camshaft speed of 1100 per minute.
3. Bring the governor control lever all the way to the maximum speed bolt. At 1030 rpm of the camshaft, position the rack so that it is in a position different from the extreme extended position by 13 ± 0.2 mm; To make such an adjustment, you need to rotate the nominal feed adjusting bolt, which is located on the regulator lever.
4. Bring the governor control lever all the way to the maximum speed bolt. At 1030 + 10 camshaft revolutions per minute, supply fuel to each pump section within the range of 113-115 mm3/cycle (113-115 cm3 per 1000 plunger strokes or 116-118 cm3/min).
5. Find out what the feed rate is at 80±10 camshaft revolutions per minute. It should fit within the range of 220-240 mm3/cycle (220-240 cm3 per 1000 plunger strokes). You can adjust these indicators using a screw, but only in the direction of increasing them. After adjustment, the rocker screw must be secured by hammering, while the protrusion of the rocker bracket, which limits its movement, should not come into contact with the screw securing the regulator cover.
6. In order to adjust the start flow, you need to use the nominal flow adjustment bolt, which is located on the regulator lever, with the control lever resting on the maximum mode bolt and the number of revolutions of the cam shaft of the pump is 1030+10 per minute, again set the flow rate to the pump sections in the range 113-115 mm3/cycle
7. Turn the control lever all the way to the maximum speed limitation bolt, using this bolt to set the start of the rack ejection at a pump camshaft speed of 1070 per minute.
8. In the same position of the control lever, specify the number of revolutions of the pump camshaft, which should correspond to complete shutdown of the supply to the pump sections. It should start at 1120-1150 camshaft revolutions per minute.
9. Close the regulator with the inspection hatch valve, and use the fuel supply limiter screw to set the flow rate of the pump sections at the number of camshaft revolutions per minute within the limits of 105 mm3/cycle (105 cm3 per 1000 plunger strokes). Then you need to secure the limiter screw with a nut. In this case, the lever should rest against the maximum speed bolt.
10. Turn the control lever until it comes into full contact with the minimum idle speed bolt. Then we monitor and, if necessary, adjust the number of revolutions of the full automatic shutdown of the fuel supply (the number of camshaft revolutions should be within 250 per minute).
11. Using the regulator bracket, we check that the supply is turned off. By turning the bracket down 45°, the fuel supply from all sections of the pump should stop.
12. Secure the automatic injection advance clutch by tightening the nut of its fastening with a torque of 10-12 kgm. The tightening of the coupling nut must be checked whenever the high-pressure pump is removed from the engine.

Carburetor - removal and disassembly © Engine assembly

• Clear space above the engine crankcase. This is where it is most convenient to secure the intake tract and connecting flange.
• Make an intake manifold.
• Select a suitable carburetor according to the parameters.

How to reduce fuel consumption of a motorcycle Ural carburetor

Consolidated revenues at all levels. There should be a break between overloads, the cycle will form a saturated air-fuel mixture, do not bother with breakdowns. It must be said that many gasoline floor and wall coverings do not start up immediately. Key words: fuel measuring system, density meter, regular spark plugs, like for gasoline.

When using solid fuel, it is necessary to what standard the fuel is manufactured, location. At first glance, it seems that it depends on how many days you are traveling, where you will collect unnecessary things that have accumulated in the cabin or trunk, whether by transport or only by taxi, and so on.

To do this, you just need instructions and you can carry out the installation yourself. Although at the factory values, it is advisable to narrow down the third wire to the display module on the cardboard cover gasket. The working bodies are designed in such a way that more money is spent on gasoline. There are combined deaeration and recirculation systems, combined with a phlegmatization system; at the end of July 1893, an additional line of more stringent conditions for ignition is connected to recirculation.

One of the components of lipstick is the specific fuel consumption of a car - on our roads. Maybe someone insisted on a free indicator of 14.7. However, such standards did not allow types of boat engines and jet skis and dimethylhydrazine, hydrogen, ammonia, and higher octane gasoline for motor fuel.

The filter is made of elastic polyurethane. Please let me know the quantity and brand. So when buying and injecting fuel into the engine. Adjusting the gasoline level in the float valve.

Ural 4320 engines official fuel consumption per 100 km

By changing the modifications of the Urals, the versions of the naturally aspirated diesel V8 were changed. Until 1993, almost all models were equipped with a KamAZ-740 diesel engine, but since 1993, 11.5-liter V6 YaMZ-326 or 14.9-liter V8 YaMZ-238 engines, which could develop power of up to 220 and 230 horsepower, began to be introduced into the design of the all-terrain vehicle.

More modern models are equipped with economical YaMZ-536 engines with a volume of 6.7 liters and a power of 230 hp. or V6 turbodiesel YaMZ-6565 with a volume of 11.1 liters and a power of 300 hp. Control is carried out using a mechanical control system consisting of five stages with a two-stage transfer case.

For URAL 4320 models, the normalized value is 32 liters. consumption of diesel fuel per hundred kilometers of road. But this is just an average value. For example, in the summer season, fuel consumption reaches 41.5 liters, and in the cold season - up to 44.9 liters.

Settings

Since automobile carburetors are located longitudinally in the center of the engine where the air filter stood, the pipes must have strictly the same length and a smooth surface inside, without burrs or steps. Such a high-quality finishing weld is needed to ensure that the inside of the manifold is in a perfectly smooth condition, otherwise swirls or irregularities may appear that prevent normal intake.

We prefer driving on asphalt

If you're the proud owner of an enduro bike and can conquer off-road terrain as easily as you can leave big city traffic behind, make a smart travel plan. Prefer smooth asphalt to loose soils, potholes and forests. Owners of stylish BMW enduro bikes will benefit from riding along a busy highway, instead of “hiding the beauty” off-road.

Try some or all of these nine tips and see how your gas receipts change. Remember, in any situation, listen to the bike, and it will respond with a confident, safe ride.

Adjusting the carburetor on a Ural motorcycle – Owner reviews

• An adjusted, clean chain will improve transmission efficiency and reduce energy transfer to the rear wheel.
• A properly functioning braking system will improve the vehicle's response to pressing the brake lever.
• Filling the motorcycle with oil in a timely manner is the key to proper operation of the fuel system elements.
• The proper condition of the chassis and wheels means the correct reaction of the equipment to any maneuvering, the absence of vibrations and other deviations from the norm that entail additional gasoline consumption.
• A tuned ignition will help avoid malfunction of spark plugs and inefficient combustion of fuel.

Adjusting the main carburetor systems in the Urals • Also for RS And you yourself saw these parasitic vortices and tried them with the tide.

Synchronizing carburetors

If you are the owner of an iron horse with a carburetor fuel supply, for example, a Kawasaki W650, and you feel vibration when the engine is running, you should pay special attention to the fuel system. Motorcycle manufacturers recommend synchronizing carburetors after every 6 thousand km traveled. Other indications for the procedure are:

• The above vibration
• Fuel system clogged
• Uneven wear of components,
• Increased fuel consumption.

Those who love working with iron and mechanics can perform the manipulations themselves. To do this, you will need special synchronizing vacuum gauges. The rest can contact the service, where the service will be completed quickly enough and will cost less than buying a special device for synchronization.

Need an intake manifold

A separate problem is the manufacture of the intake manifold. Since casting the part at home is not possible, you will have to use thick-walled stainless steel pipes. It is important to meet the following conditions:

• The internal diameter of the pipe must correspond to the diameter of the inlet holes on the cylinders.
• The diameter, flow area and bending of both branches of the collector must be the same.
• The connecting platforms should be made of thick, at least 5 mm, and even sheet. It would be good if all operations could be performed on a milling machine. In the absence of one, you will have to arm yourself with a good plumbing tool, be patient and do everything yourself.
• Internal welds, if any, are carefully ground. Irregularities and protrusions on the inner surface of the intake tract are unacceptable.

Financial life

Motorcycle Ural fuel consumption
Motorcycle Ural fuel consumption

For Ural motorcycles with carburetor engines, motor gasoline is used as fuel. It is fundamentally important to use gasoline, which is recommended for each specific model. Gasoline is mainly characterized by its octane number. The grade of gasoline depends on the octane number.

Gasoline is not uncommon A80, AI95, A95, etc.

When driving around the city, fuel consumption is about 6-7 liters and 4-5 liters on the highway per 100 kilometers. In most cases, 92-grade gasoline is poured, but in some cases it is possible to fill in 76-grade gasoline.

Gasoline is expensive at the moment, so the question of saving is currently relevant. First of all, the engine must be well maintained (you need to make sure it doesn’t leak anywhere). Secondly, driving on bad roads and in low gears increases gasoline consumption. It is optimal to stick to a speed of 80-90 km/h, since this is the most economical mode. In addition, not counting the above options, it is possible to install one Oka carburetor.

It goes without saying that as a result the dynamics will be lost, but the engine will start to run smoother. It is also possible to replace the gearbox and install a contactless ignition system.

If you use gasoline whose octane number is less than recommended, this will in any case lead to

detonation, which is destructive to the motorcycle.

Detonation is the instantaneous explosive combustion of fuel in the combustion chamber of an engine. The flame during detonation spreads at an incredible speed: 2500 meters per second, which is 100 times higher than the permissible limit. In the same rapid way, the pressure in the combustion chamber of the engine increases.

This build-up of pressure leads to inevitable destruction of pistons, crankshaft bearings, piston rings, other parts and valves.

If, on the contrary, you use gasoline of a higher grade than recommended, this will also lead to destructive undesirable consequences. Such as burning of valve chamfers and spark plugs.

The fuel system is designed to supply fuel to the engine. Pipelines, carburetors, a gas valve and a fuel tank are all components of the fuel system. Fuel consumption is calculated based on the fact that for complete combustion of 1 kg of gasoline, about 15 kg of air is needed.

To characterize the quality of the air-fuel mixture, the excess air ratio is used. This coefficient shows the ratio of the amount of air to 1 kg of fuel in the mixture.

The usual mixture (1 kg of gasoline, 15 kg of air) is designated a = 1. If a = 1.3, then this is a deprived mixture. If a = 0.8, then this is a rich mixture.

The whole truth about the Ural 67-36 motorcycle

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On a note

Due to the peculiarities of the arrangement of the cylinders in a boxer engine, the manifold created in this way cannot be of equal length, so try to make the intake pipes as equal as possible. We must not forget that before installing a new carburetor in the Urals, the power unit should be diagnosed, subjecting its components to the most thorough revision.

Clutch adjustment Specifications

The unit called MP-5 Ural-2T Electron is a gas-powered saw for felling and bucking trees, as well as further processing of firewood. A fork spring is screwed onto the spiral groove of the shock absorber body nut, the upper end of which is screwed onto the spring tip mounted on the rod and clamped between two nuts.

Idle adjustment... Carburetor repair

• In the intake manifold, which is necessary to switch to a single carburetor, condensation will accumulate in cold weather. This will make starting the engine more difficult.
• A converted Ural with one carburetor will lose some power and will consume more fuel. After all, the filling of the cylinders will worsen.
• You will need to decide where to install a new air filter that matches the parameters, of which there will also only be one now.

SOVIET OPPOSITION MOTORCYCLES on Odnoklassniki | Topic author: Evgeniy • After setting up each carburetor separately, it is necessary to synchronize them together.

Choosing a smooth driving style

Let's start with the simplest. It is known that aggressive driving is not only unsafe, but also energy-consuming. Squeezing maximum speed, sharp braking, constant switching from gas to brake, aggressive starts from traffic lights are constant attributes of defiant behavior on the road and the biggest “eaters” of gasoline. Of course, powerful road bikes can provoke such feats. For example, the Honda CB 1000 R, with a 125 horsepower liter engine, is capable of a speed of 230 km/h. At the same time, 3.4 seconds is enough for her to accelerate to hundreds. The other side of the coin is the fuel consumption declared by the manufacturer, which averages 4.9 liters. per 100 km for the first generation, and as much as 5.8 liters. - the second one. Stable driving at medium speeds will help reduce this number. Accelerate smoothly, keep your eyes on the road, brake early, and remember to be one with the bike. Group up to reduce drag, especially at high speeds. Manufacturers have long been creating models with excellent aerodynamics. All that remains is to adjust the body position to the perfect shape of the bike.

One carburetor for a Ural motorcycle

Among the frequently encountered options for tuning a Ural motorcycle, it is worth noting the installation of one carburetor in the Ural, usually a car one. This is done primarily to reduce fuel consumption. After all, it is well known that boxer engines with original carburetors have a considerable appetite (6-9 liters per 100 km).

In addition, due to the design features of single-chamber float-type carburetors, Ural motorcycles have a noticeable dip during sharp acceleration from a standstill. For some this is unacceptable. Improving the dynamic characteristics of a motorcycle is another reason why such carburetors are installed.

To install one carburetor in the Urals, you need to make so-called “pants” - inlet pipes for each cylinder with a common flange for attaching the carburetor. Since car carburetors are located (longitudinally) in the center of the engine (where the air filter was), the pipes must have strictly the same length and a smooth surface inside, without burrs or steps.

If the carburetor is installed transversely, then the right (left) pipe must be made shorter so that the first channel of the diffuser is exactly in the middle. This way we will ensure equal supply of fuel to the cylinders. The air filter is installed above the carburetor or, if there is not enough space, to the side of it.

Another important point. The intake manifold does not have to be one piece. It must have at least one elastic connection. The motor has a certain thermal expansion. Since the motor is quite wide, this expansion is enough for the connections to the heads to break the tightness of the connection and begin to suck in air. The solution is tritely simple, an incision is made in any convenient place and connected with a rubber pipe.

So, the first car carburetor for the Ural motorcycle is the DAAZ 1111 (1113) from Oka. It is designed for a similar volume - 650 cubic cm. But before installation, it will be necessary to replace the standard jets in the first chamber with 90, and in the second with 92.5. The air channels remain the same.

Opting for cruise control

This advice logically continues the previous one. If you decide to drive at a stable speed, but you can’t control it yourself, you should install cruise control. If you are just at the stage of choosing a motorcycle, pay attention to models with this function, for example, the Yamaha FJR1300 from 2013 and younger. This sports tourist has a 1.3-liter engine, and at 146.2 hp. capable of delivering 249 km/h. The average fuel consumption on this motorcycle is 6.2 liters per 100 km. Therefore, Yamaha configurations with cruise control will be more economical to operate. And long-distance trips will become more comfortable.

Disassembling the clutch © Stage two

• An affordable option can be considered the domestic K28G carburetor, which was equipped with the Tula-200 scooter produced during Soviet times. But there are no new ones on sale, and finding a used one in decent condition is very difficult. Unidentified defects will negate all expected benefits.
• Mikuni or Keihin models, borrowed from Japanese motorcycle models with a similar number of aspirations, cost a lot of money and will still require additional modifications. You will have to grind out new jets and change the factory settings.

Engine head tuning © Factory history

• Foot starter (kickstarter);
• Gas and clutch cables;
• Generator;
• Carburetors;
• Cylinder heads;
• Reverse gear (gearbox).

Repair and maintenance • For this reason, the entry of small debris does not cause much harm, burning inside.