Izhevsk motorcycle can certainly be considered one of the most elegant and reliable. Being very light and compact, this motorcycle is capable of carrying incredibly large loads. Thus, the IZ Jupiter 5 engine is capable of withstanding a load of 500 kg !
This is an excellent result. The motorcycle itself looks sporty. Classic minimalism of the Soviet period was intended more for the youth of that time, but was popular among all age groups.
IZH has the ability to install a cargo module or stroller, which is very convenient when transporting passengers or massive cargo. At the same time, it has excellent cross-country ability on any soil or road surface. However, traction is significantly reduced in wet weather, and stability issues may arise in muddy conditions.
The unit is very unpretentious to weather conditions. In severe frost, down to -30 degrees, starting the engine is not difficult. Even in extreme heat, there are no problems with overheating.
The characteristics of the IZH Jupiter 5 engine were quite good for Soviet times. The two-cylinder engine produced about 25 horsepower, allowing the bike to accelerate to 120 km/h. For comparison, Ural and Dnepr motorcycles had an average maximum speed of approximately 110 km/h . However, like any Soviet bike, problems arise with reliability. Frequent engine repairs of the IZH Jupiter 5 are part of the operation of the motorcycle.
Tuning IZH 5 Jupiter Planet
In total, the modernization of the products of the Izhevsk plant is not much different from the processing of the Urals, Dnieper, etc.
Soviet bikes. Tuning is not carried out en masse except for Java. Be that as it may, the current economic situation and the poor design of motorcycles in the USSR led to the fact that the processes of amateur modernization began back in the 1980s. Then they installed a side leg on Jupiter 5. Tuning of this format is not uncommon in Russia, Ukraine and Belarus. Tuning IZh Planeta is less widespread, but nevertheless it is also common.
First of all, it should be noted that there are 4 basic models of iron horses, which are most often subject to serious modification. These include Dnepr-11, Ural M, Izh Jupiter 5, and Izh Planeta 5. Tuning of such bikes is considered justified due to the significant weight of the latter. Minsk, which for the most part resembles a moped or scooter, quickly gets boring for growing compatriots, but four-stroke boxers or fast IZhMoto bikes may not get boring in their entire lives.
There is a forum on vse-o-moto.com where two-wheeled enthusiasts who are more experienced in bike mechanics and modernization will certainly help you with advice on installing an electric starter or modifying the bike’s handlebars.
Where is it recommended to start tuning IZH 5 Jupiter Planet?
First of all, it wouldn’t hurt to replace the contacts on the ignition.
Moreover, an electronic ignition system fits well in their place. Note that installing a starter on the above model is not recommended by most experts. It wouldn’t be a bad idea to equip your IZ Jupiter tuning with a tachometer. Practice has shown that spare parts from the Zhiguli six are perfect for this. Installing a side leg, which is welded to the place where the front engine is mounted, is another functional necessity.
Now let's discuss pampering. By cutting off the so-called “cigarettes” (a thin tube with round holes) in the exhaust pipes, you can change the sound of the bike. Tuning of IZH Planet is also carried out with the above capabilities. The main thing is to cut a little and always in the inside of the exhaust. The sound of “Java” is guaranteed to you.
1 External tuning of a motorcycle - creating a modern appearance
The owners of this motorcycle, which can be purchased on the market for $650-700, try to bring their bike to perfection as much as possible. IZH Jupiter 5 lends itself well to various tuning options, and you should start by improving the appearance of the motorcycle.
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First of all, the design of the motorcycle is simplified, everything unnecessary and non-functional is removed. In addition, you can lengthen the frame, which will give the bike a classic look. To improve the appearance and technical characteristics, instead of the standard dashboard, you can install an analogue from a VAZ 2106 car. The tachometer, speedometer and temperature sensor fit perfectly into the standard holes in the motorcycle panel; such changes will give the motorcycle a more modern look, especially if you install LED backlighting in the new instrument panel.
To increase comfort, the seat can be reupholstered with new material, leather or leatherette, or you can install a more sporty saddle from a Japanese bike, but you will have to adjust it to the factory mounts. In addition, you can install a more comfortable steering wheel, replace the footrest, repaint the motorcycle in a new color and install sports wheels, as well as new rear-view mirrors.
To increase safety when tuning IZ Jupiter, new protective arches and shields are installed to protect the rider from dirt. You can also install a new front fairing and more stylish saddlebags at the front of the motorcycle yourself. Some owners style the IZH Jupiter 5 as a Japanese model Suzuki Bandit 650; for this, many standard parts are replaced. If you have a “donor”, you can match the appearance of a domestic bike to another popular Japanese motorcycle model.
Tuned spare parts for IZH motorcycles
The catalog contains a huge selection of tuned spare parts intended for the IZH Planet and IZH Jupiter motorcycles. There are fairings, trims, engine protection elements, brackets and much more. Everyone will be able to choose exactly the part that will decorate their vehicle. Motorcycle tuning is a creative matter, and different motorcyclists’ concepts of beauty can vary greatly. Our range is designed for people with the widest tastes. The products are easy to install, you can do the job without involving specialists. A small set of tools that every motorcycle owner has in their garage is enough.
Encyclopedia
The IZH Jupiter 5 motorcycle is an excellent bike at a competitive price. The popularity of this representative of Russian motorcycle technology is very high. The bike's power is 25 hp, and the maximum speed is 140 km/h. Not bad at all, but with the help of motorcycle tuning you can significantly improve these indicators. IZH Jupiter 5 is a strong link and a fairly high-quality motorcycle equipment. These bikes help Russian people not only in everyday travel, but also in motorcycle racing and sports competitions.
Izh Jupiter 5 motorcycles are distinguished by good design and reliable construction. These Russian motorcycles have been on the assembly line since 1985. From that time to the present day, there has been enormous interest in them. Motorcyclists choose the IZH Jupiter motorcycle primarily because of its favorable cost. You simply cannot find a more affordable bike, plus it has good ride quality, easy handling and very great potential. Riders purchase IZH Jupiter 5 motorcycles at a low price from 7,000 to 30,000 rubles in satisfactory condition and bring them to perfection with the help of motorcycle tuning.
Tuning the engine of the IZH Jupiter 5 motorcycle
The IZ Jupiter 5 motorcycle engine can be boosted very well. Therefore, when tuning, first of all, the engine can be improved.
1) First you need to repress the crankshaft. The main bearings of this shaft are replaced with new bearings from the secondary shaft of the Java motorcycle. This will increase the life of the crankshaft. You can also install the crankshaft on needle bearings - they can withstand increased loads and their efficiency is slightly higher than others. Don't forget to thoroughly polish the crankshaft and lubricate the bearings.
2) We enlarge and polish the intake manifold channels with high quality
3) We install a carburetor from the IZH Planeta-5 motorcycle with a diffuser diameter of 32 mm. Some mechanics increase the diffuser diameter to 36 mm. But the main thing here is not to overdo it! For greater effect and a significant increase in acceleration dynamics, we install two carburetors - one for each cylinder. And we set them up correctly. As an alternative, you can use carburetors from the Voskhod K65V motorcycle, as well as from the Java motorcycle.
4) We carry out fine-tuning of the piston. The pistons must have the same weight. It is advisable to lighten the piston pins by turning them into a cone at the end, and then chamfer the ends. We lighten and polish the connecting rods. Cylinder heads – thoroughly cleaned of carbon deposits and thoroughly polished. Place IZ Jupiter 5 copper factory gaskets under the cylinder heads. After all this, set the ignition timing correctly.
What spare parts for the Izh Jupiter motorcycle may be needed during repairs?
"Izh Jupiter-5" was offered both with a sidecar and in a single version. A cargo trailer and cargo module were also present. If you look at the appearance and style, it resembles Izh Planet-5. As for the differences, internally the “Planet” is distinguished from the “Jupiter” by the engine. The latter has a two-cylinder, two stroke, volume of almost three hundred and fifty cubic centimeters. It is equipped with cooling with liquid reagents, which prevents the engine from overheating, preventing the expansion of its components, and significantly reduces the noise of the motorcycle, saving fuel. The engine power is three horsepower more than that of the Planet, and in terms of speed, it is quite inferior to it. In general, Jupiter-5 is quite maneuverable and quite capable of lifting loads, and the latest modification gives excellent brakes, the ability to customize the suspension and disc wheels instead of spoked ones, which significantly increases driving safety.
Installing two carburetors
If you decide to tune your motorcycle to the maximum, you can increase its performance by installing two carburetors. As you know, Izh Jupiter 5 has 2 cylinders, and accordingly you can put a carburetor on each of them.
But be careful, because you will have to properly balance the fuel supply. As a result, the motorcycle’s power will increase significantly, which is the main goal of engine modernization. If you want to do a similar procedure yourself, be sure to look at the Izh Jupiter 5 tuning video, which should be plenty on the Internet.
Improvement of technical parameters
Tuning to increase power.
The design of the motorcycle engine allows for tuning to increase its power. One option is to re-press the engine crankshaft and change the support bearings. Usually, secondary shaft bearings from a Java motorcycle were installed as new bearings. This restoration made it possible to achieve an increase in engine power of the IZH Planet - 5 by 10-15%.
The next option for adding power was to increase the cylinder volume. For this purpose, its upper part was cut off and the sleeve was bored to 76 mm. Then the appropriate piston was installed, usually a piston from a Planet Sport motorcycle was used.
Increasing the speed of the motorcycle.
After this operation, the speed of the motorcycle increased, according to some sources, to 160 km per hour. Therefore, work to increase engine capacity was carried out by owners who planned to operate their vehicle mainly on highways.
The most difficult technical tuning option for adding power to the IZH Planet - 5 is the installation of supercharging. For this purpose, an exhaust valve is installed, the device of which corresponds to the analogues on the sports versions.
Then an exhaust resonator is installed, which has sharply directed parameters. Its task is to create a wave backpressure of the fuel mixture. Next, a spool valve is installed to obtain asymmetrical phases of engine operation, which avoids the direct release of the spent mixture.
Performing supercharging on the engine of the Fifth Planet is a rather complex process and therefore is not widely used.
Improved grip.
As engine power increases, it is necessary to carry out work to improve the clutch. Under standard conditions, the standard clutch works reliably.
But as the load increases, the risk of “burning” it and subsequent repairs increases sharply. The main steps for tuning the clutch come down to replacing standard discs with larger metal ones. Typically, such discs are made of two millimeter iron.
The use of thicker metal discs reduces slippage, warping, breakage and provides greater heat transfer.
Silencing attachment
You can make such an attachment from the old muffler of the “fifth” or “fourth” “Jupiter” or the “fourth” - “third” “Planet”. A cylindrical piece without partitions should be used to make the nozzle. The “flute” must be made of a heat-resistant material; the muffler connecting pipe from the Ural motorcycle may be suitable for this.
Holes will need to be drilled in it, and the free space between the body and the tube should be filled with glass wool. The exhaust pipe can be left original. It should only be shortened a little and the connection should be welded rather than bolted.
The next step will be to improve the intake system. The minimum program would be to install a carburetor from the Planet-5 motorcycle, where the diffuser diameter is 32mm. To do this, it is necessary to cut the inlet windows in the pipe flange and cylinders a little. To significantly increase acceleration dynamics with simultaneous synchronous operation of the cylinders, two carburetors will be needed.
On foreign-made motorcycles, a carburetor for each cylinder has been installed for a long time and has become the norm. From the standard pipe you will need flanges with which to attach to the cylinders. In addition, it will be necessary to machine two aluminum bushings, and the carburetor mounting flange will need to be cut off from the Planeta inlet pipe.
The second flange can be taken from the old “Jupiter” carburetor. Welding of parts must be done with argon, after which the assembly must be adjusted until the gaps completely match. If small gaps have formed, they can be filled with epoxy or “cold welding”. When using epoxy glue, you can use aluminum filings or powder as a filler.
To ensure uniform traction up to acceleration of 100 km/h, use the K 65V from the Voskhod motorcycle. It is advisable to replace the main fuel jets, needles and nozzles; repair kits for these carburetors are relatively inexpensive on the market. The fuel level in the float chamber can be left the same. Having completed the carburetor, you can begin upgrading the air filter.
The original air filter installed on a motorcycle is not only unable to provide high-quality air purification, but also reduces engine power. In this case, you can buy an imported filter or use the upper part of the foam filter for the Voskhod motorcycle, which can cope with both installed carburetors, besides, it takes up little space and is very easy to maintain. Impregnation of foam rubber should be done with special oil for air filters. Getting such oil will not be difficult.
One of the most important jobs remains - finishing the cylinders and piston group. The engine from Jupiter-5 is more mature, so there will be much less fuss with it. In the figure, the red lines refer to the development of the modified “Sport” cylinders, the black lines show the standard “Classic” version. An increase in engine power can be achieved by trimming the upper edge of the exhaust window by 1.5-2mm.
To increase the power of the Yu-5 engine by increasing the speed, trim the upper edge of the exhaust window by 1.5-2 mm. A prerequisite is the same weight of the pistons, and the windows must coincide with the purge windows in the cylinders and in no case overlap them. The edges of the piston rings will need to be chamfered.
It will be necessary to lighten the piston pins by cutting them into a cone at the end. It is also necessary to chamfer the end of the fingers. The “tails” of the locking pins will need to be bitten off so that they are not cut off by the piston pin.
For further refinement, you will need to find a crankshaft that has a needle bearing in the upper part. Such a shaft can be found on the “liquid” Jupiter. This shaft is interchangeable with other models. To ensure better lubrication of the bearing, it will be necessary to drill two holes in the head, the diameter of which should be in the range of 3-3.5 mm, as is done on the Planet. As practice shows, standard aluminum separators installed at the factory are not reliable.
This modification will help increase engine power to 35-37 hp, and engine speed will be 7100 rpm.
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