Pipes, muffler for motorcycles IZH Jupiter, Planet 5
The engine of IZH motorcycles is two-stroke, so the fuel combustion process is noisier than a four-stroke engine, and a larger amount of unburned gases is also released into the atmosphere. At the moment of release, the exhaust gases have a high temperature that is dangerous to the health of the motorcyclist. Therefore, the IL muffler pipes must have a more complex design. Comply with safety standards and not cause harm to human health and the environment.
IZ Jupiter 5 tuning. Start
Tuning Izh Jupiter 5 itself is not very complicated. First, the design of the motorcycle itself is made lighter, everything unnecessary is eliminated. It makes sense to lengthen the frame, it will add style. To create a greater impression of technical capabilities, instead of the standard instrument panel, it makes sense to install the removed panel from the “six”. The tachometer, speedometer and temperature sensor fit perfectly into standard holes in the motorcycle panel; such an upgrade changes the appearance of the device, rejuvenates it; LED backlighting on the instrument panel will look especially impressive.
Tuning Jupiter 5 involves a lot of changes in appearance. For example, to increase comfort, you can reupholster the seats. Replace it either with good leather or with high-quality leatherette. You can also change the steering wheel to a more representative and comfortable one, change the footrest, paint it a different color, install larger sports wheels and rear-view mirrors.
To improve safety, when tuning the Izh Jupiter 5 motorcycle, new protective arches and shields are installed to protect the rider from dirt. It is quite possible to create the front fairing and more stylish panniers on the front of the motorcycle with your own hands. Many craftsmen adapt the style of IZH Jupiter 5 to the Japanese model Suzuki Bandit 650, in this case a lot of and labor-intensive work with parts is required.
The IZ Jupiter engine has an engine that is simply created for mechanical tuning. Compared to the factory version, after modifications the engine miraculously improves its performance.
The principle of operation of the muffler
After fuel combustion in a small chamber, the gases have enormous energy and escape at high speed from the cylinder pipe into the pipe and then into the muffler. This is accompanied by a lot of noise. After passing through the labyrinths of the silencer, the energy wastes its strength. This causes all exhaust parts to heat up. This system not only performs the work of removing gases. By selecting the size and geometry of the muffler pipe, you can achieve fuel savings and increase the power of a two-stroke engine. The picture of the layout shows which part is responsible for what.
Engine tuning
The two-cylinder two-stroke engine with a working volume of 347.6 cubic meters was installed on the motorcycle. see most often has air cooling. The number of models released in recent years of production that used liquid cooling is negligible. The power that the engine develops is 24 hp. With. – can be increased by making some simple modifications:
- Increase the compression ratio by removing about 1.5 mm from the adjacent plane of the block head. But this will require switching to fuel with an octane rating of AI-95 and making changes to the design of the crank mechanism. First of all, replacing the crankshaft bearings. You will also have to select spark plugs with a different heat rating.
- Replacing crankshaft bearings. There is an opinion that only high-quality imported bearings can cope with increased loads. In fact, domestic developers have installed bearings with a large margin of safety. If you manage to purchase high-quality Russian analogues, they will do the job perfectly. Trying to change the size of the crankshaft journals is simply harmful. The thickness of their hardening layer is small and when more than 1 mm is removed from the surface of the journal, the service life of the part will sharply decrease.
- Replacement or modification of pistons. The stock parts aren't that bad. Don't rush to look for a replacement for them. To increase power, it will be enough to lighten the pistons by removing casting flash and excess material from them. Parts should be carefully adjusted according to weight. It is desirable that the difference does not exceed hundredths of a gram. Such simple engine tuning will be more effective than installing a zero-resistance air filter or a direct-flow muffler. Although it is, of course, possible to install forward flow on IZ Jupiter-5.
- Installing another carburetor. If possible, it's worth shelling out for a good Mikuni carburetor. Don't go for a large diffuser size. The standard diameter of 32 mm will be quite sufficient. But it’s definitely worth removing the protrusions on the intake and exhaust manifolds and polishing the internal channels of these parts. This will not only provide an increase in power, but will also help reduce fuel consumption below five liters.
- Replacement of the ignition system. Installing BSZ on IZ Jupiter-5 only makes sense if you intend to use imported components. Most likely, the quality of domestic components will reduce all the advantages of the contactless ignition system to zero and the rework will not give the desired result.
Do not forget that increased power will improve the acceleration dynamics of the motorcycle, but will not provide a significant increase in speed. To increase speed, you will have to change the transmission gear ratios, selecting different sprockets for the gearbox and rear wheel.
Causes of engine power loss
The first models of IZH motorcycles were equipped with easy-to-maintain mufflers. The advantage is complete disassembly. We began to notice a drop in power. First of all, pay attention to the exhaust system. Disassemble the muffler and give it a good cleaning. But soon they felt weak power again. Pay attention to the gap between acoustic filter 2 and partition 1. The lack of normal gap inhibits the exit of gases, which leads to a drop in power. The engine starts running intermittently.
IZ Jupiter 5. Tuning the engine
Izh Jupiter 5 tuning truly begins with reworking the engine. The first stage is repressing the crankshaft and replacing bearings with a model from a Java motorcycle crankshaft. There is an option to install needle-type bearings, they have a higher effect.
After replacing the bearings, you urgently need to lubricate them and polish the crankshaft and the intake channels of the engine manifold; they can easily be made larger. In addition, the motorcycle upgrade includes the replacement of a carburetor with an increased diffuser diameter by 32 millimeters. This motorcycle is equipped with a carburetor from other masterpieces of the domestic motorcycle industry IZH Planet or the Java motorcycle. There are specialists who increase the diameter to 36 millimeters, or stick in two carburetors, one for each of the cylinders, in this case you need to take the tuning process very seriously.
IT IS IMPORTANT! Motorcycles for beginner motorcyclists
Muffler cleaning methods
The exhaust system has no adjustments, therefore, it is necessary to clean it in a timely manner.
Filters that dampen sound must be removed and burned. You can do it over a fire or use a blowtorch. Cool quickly using cold water. This leads to carbon deposits peeling off. Clean the pipe with a metal brush.
The next method is to burn off the carbon deposits and remaining fuel inside. Let's place the pipe vertically, you need to set it on fire from below, a draft will appear and all the carbon inside will burn out. All that remains is to remove the combustion residues.
A gentle way to clean. Use a chemical solution to soften deposits. The solution is prepared for a liter of water, 25 grams of caustic soda, 33 grams of carbonic soda, 8.5 grams of soap. Heat the solution strongly until almost boiling. Pour it inside the muffler and wait a couple of hours. After this, rinse thoroughly with warm water.
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Carbon deposits in the exhaust system significantly reduce engine power and efficiency. Therefore, from time to time you have to remove and disassemble the exhaust system for cleaning.
1. Place the motorcycle on the center stand.
2. Using a special ring or “gas” wrench, unscrew the union nut securing the exhaust pipe to the cylinder. If the nut does not give in, we moisten the threads of the pipe with penetrating lubricant and after one or two hours we apply light “unscrewing” blows through the beard along the slots of the nut.
3. Remove the aluminum sealing ring.
How to weld the muffler Izh Planet
Carbon deposits in the exhaust system significantly reduce engine power and efficiency. Therefore, from time to time you have to remove and disassemble the exhaust system for cleaning.
Removal and disassembly
1. Place the motorcycle on the center stand.
2. Using a special ring or “gas” wrench, unscrew the union nut securing the exhaust pipe to the cylinder. If the nut does not give in, we moisten the threads of the pipe with penetrating lubricant and after one or two hours we apply light “unscrewing” blows through the beard along the slots of the nut.
3. Remove the aluminum sealing ring.
4. Using the same tool, unscrew the union nut securing the muffler to the exhaust pipe. Carefully slide the nut forward along the pipe, trying not to damage the asbestos cord sealing the joint.
5. Unwind and remove the asbestos cord. It is more convenient to screw the nut back onto the muffler thread for subsequent removal of the system.
6. Using a slotted screwdriver, unscrew the two screws securing the acoustic pipe.
7. Remove the acoustic pipe from the muffler body.
8. Using a 17 mm wrench, unscrew the nut of the rear muffler mounting to the frame, holding the bolt with a 14 mm wrench.
Posts 1 page 30 of 33
ShareOctober 118, 2021 19:50:32
In general, another opinion poll: who operates Izhevsk two-stroke engines with a homemade exhaust? What about increased consumption or loss of power? In theory, a two-stroke engine should have a tuned exhaust, or is this not very relevant for the archaic IZH-Planet engine? after all, in practice there are a lot of homemade products with various mufflers “from what was at hand”, even the factory SZD muffler bears little resemblance to what is needed for a two-stroke, I’m generally silent about the MP800 motor pump.
ShareOctober 219, 2021 14:14:01
silence. Well, what if specifically in relation to a certain technique?
Share October 319, 2021 18:32:33
silence. Well, what if specifically in relation to a certain technique?
I once tried to carry out calculations for the exhaust of a two-stroke. Experts advise that everything should be like in the book. Exhaust pipes and muffler play an important role in mixture formation and engine efficiency, something like valves on a 4-stroke engine.
Share4 October 19, 2021 19:02:26
Experts advise that everything should be like in the book. Exhaust pipes and muffler play an important role in mixture formation and engine efficiency, something like valves on a 4-stroke engine.
Is it clear that in practice?
Share5 October 20, 2021 08:09:22
Edited by rw4cju (October 20, 2021 08:16:36)
Share6 October 20, 2021 13:28:19
If you deviate from this, both in the direction of simplification (resonators) and “strangling”, then the internal combustion engine will in any case “eat” more, but this percentage, conditionally 1-4%, although it will be, is probably not so relevant for this design .
4% in our case is considered nothing. But here’s a question: what if I also install a muffler (it looks like the volume is 1.5-2 liters) from the D300 to the pipe I welded?
Share7 October 20, 2021 16:38:42
even the factory SZD muffler bears little resemblance to that required for a two-stroke,
the S3D motorized stroller has an IZH-P-3 engine on a motorcycle, its power is 18 hp, when installed on a motorized stroller its power is 14 hp, a reasonable question is, where did the 4 hp go if the engine had a more powerful DC generator of 200 W, therefore, it takes up no more than 0.5 hp due to the greater weight of the armature and the rolling resistance of the V-belt drive. The aluminum cooling fan impeller has a high moment of inertia and at high speeds takes another 1.5-2 hp, resulting in an imperfect muffler power decreases by 1.5-2 hp. What is the problem with a small muffler? Due to the small volume, the wave of exhaust gases escaping from the cylinder is not sufficiently dissipated and partially returns due to gas resistance at the exhaust, as a result the engine consumes less fuel due to the gas pressure in the muffler, less mixture escapes during purging, but not everything is as good as it looks at first glance, firstly, engine power is reduced due to deterioration in cylinder purging, overheating of the exhaust ports occurs (if the engine is air-cooled), overheating of the piston with side of the exhaust due to insufficient cooling, especially when operating in hot weather or low-quality fuel. To solve this problem, it is necessary to clean the exhaust pipes or pipe, if there is only one, from carbon deposits in a timely manner; when designing the exhaust pipe system, make it larger in cross-section to reduce pressure and temperature exhaust, good results are obtained by using a car-type resonator, you can even take a standard one installed in front of the muffler, the resonator allows you to reduce temperature and pressure due to the preliminary expansion of the exhaust gases. It makes sense to design a muffler according to the scheme of two-stroke Japanese scooters, in which gases pass through the exhaust pipe they expand in the primary large chamber, the walls of which inside have a noise-absorbing coating held in place by a mesh, then the gases pass through a labyrinth of tubes and cavities, this design can effectively reduce engine noise.
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Correction of motorcycle appearance
Changing your appearance can happen in different ways. Among the most common:
- Fairing installation.
- Replacing the fuel tank.
- Seat modification.
- Motorcycle painting.
Fairing installation. This is the first thing that many lovers of modifying the appearance of motorcycles undertake. Although it is possible to cope with such a task, it should be recognized that the development of such components is a complex task that requires specific skills. The enterprises employ entire groups of specialists engaged in the design of fairings.
Previously, plaza development methods were used for this, but today automatic design systems are used. Finished parts are blown in wind tunnels so that their behavior in air flow can be assessed.
A person who does not have specific skills, despite all his talents, will most likely receive a result of dubious quality. The surface of the fairing will be uneven, which is clearly visible in the 5 photos posted online illustrating Jupiter tuning. The aerodynamics of the motorcycle may not improve, but worsen. Take all this into account before you decide to start making and installing a fairing.
Replacing the fuel tank is a completely justified decision. But you shouldn’t try to make a complex part yourself. This is not an easy task even for enterprises with special technological equipment. It’s smarter and easier to choose a ready-made fuel tank from some other motorcycle model.
Seat modification. You can try to make a change to the standard structure by upholstering it with a new material like leather or a good substitute, and installing a new filler. But the original seat has a significant mass. To reduce the weight of the motorcycle, it makes sense, as in the case of the fuel tank, to select a part from other equipment.
Painting IZ Jupiter-5 is a good thing. Here you can let your imagination run wild. But the best results can be achieved if you know the laws of color combinations or consult with a professional designer. Otherwise, instead of a stylish combination of contrasting colors, you can end up with an eye-catching color scheme.
If you are interested in long-lasting paintwork, first apply a layer of high-quality primer and refuse to use nitro paint, preferring alkyd or polyurethane enamels.
