In detail: do-it-yourself repair Izh Jupiter 5 from a real master for the site my.housecope.com.
The production of the Izh Jupiter 5 motorcycle began in 1985. This is an affordable model of domestic production with good technical characteristics of the engine at that time. The popularity of this motorcycle was so great that its relevance does not fade away today. Therefore, in this article we will look at tuning this model.
So let's start with the fun part! As the saying goes: they are greeted by clothes. The factory appearance of the motorcycle has a rather dull appearance. If sports bikes are your thing, you have to work hard to re-shape the bike. The standard gas tank is ugly and very heavy. This part of the bike immediately catches the eye, so we put a streamlined tank from a sports bike. As a rule, there are a lot of these on showdowns. This detail has the character of not only an external transformation, but also improves the feeling of control, because it allows the knees to better grip in the saddle. The bulky seat is also replaceable. This will have a positive effect on the weight of the motorcycle, the standard seat is very heavy.
You can make two sectional new seats yourself:
It is enough to cut out the base from a sheet of thick plastic and give it the intended shape.
Paste over with a thin layer of furniture foam rubber, then sheathe the seats with eco-leather.
The next procedure will be to change the tail section:
First, cut out the desired tail shape from the construction foam.
Then use epoxy glue and fiberglass to glue the mold in layers.
After the mold has dried, we cut out the foam, the residues are removed with a solvent.
The fiberglass tail lends itself well to priming and painting. Go for it! Well, the rear of the frame will have to be digested for a new tail, depending on its shape and size. A good improvement would be the replacement of old tires with road sports ones. Installing new mirrors will give a modern look, and most importantly, improve visibility. The dashboard can be supplied from a Chinese motorcycle or moped, as well as steering wheel controls. It will not be superfluous to install xenon in the headlight and replace all bulbs, turn signals and brake lights with LED ones. Example Izh Jupiter 5 tuning photo:
Video (click to play).
Many Jupiter owners are not satisfied with the power of their motorcycle. In this part of the article, we will take a look at Jupiter 5 engine tuning. In fact, the IZH engine has great potential for increasing power. First, make sure that the engine is in more or less normal condition, the cylinder ribs are intact, and the bearing seats in the crankcase are not broken. First of all, the tuning of this model consists in eliminating the "jambs" from the poor quality of manufacturing parts of the serial industry of the past years, since at that time they tried to reduce the cost of production as much as possible. Remember to wash the engine before disassembling. Having disassembled the engine, we advise you to replace all bearings with European or Japanese counterparts, because the speed after tuning the Izh motorcycle will increase and the load will increase. If the clearances between the pistons and the cylinder do not correspond to the norm, you will need to bore to the nearest repair size. Then we proceed to the processing of the purge channels. As a rule, these are steps at the joints between the bottom of the cylinder and the surface of the crankcase.
They create drag and unnecessary swirling of the fuel mixture, which reduces the flow rate and prevents the engine from getting maximum power. This can be done with cones and a drill.
Perhaps it will seem to someone that in tuning an Izh motorcycle, the installation of a forward flow, a beautiful exhaust pipe, etc. is a mandatory attribute. We strongly advise against doing this! This will increase fuel consumption and cause a loss of power.The exhaust system should consist of two resonators.
It is also not permissible to connect 2 exhaust pipes into one. If desired, you can make muffling nozzles after the resonators, making the exhaust sound less harsh.
The intake system also applies to tuning the Izh Jupiter 5 engine. The main disadvantage of the intake system is the absence of a petal valve and the presence of only one carburetor on a standard engine. One carburetor does not allow developing high revs and, accordingly, power. An excellent solution would be to install two identical carburetors together with two petal valves "houses".
To do this, you will need to make new inlet pipes for each cylinder separately with housings for petal valves. They provide the movement of the fuel mixture only inward, which has a positive effect on filling the cylinders and increasing power. Carburetors can be supplied from foreign 2-stroke equipment of a similar volume, but if the budget is limited, then domestic K68 from the Ural motorcycle will do. In this case, it will be necessary to select the jets for the volume of the Izh Jupiter 5 engine.
At the end of the article, I would like to note that the tuning of this model does not end with the above methods. Tuning Izh Jupiter is a complex chain, where one design change will entail another. Take care of the undercarriage reinforcement, balance the motorcycle rims, reinforce the swingarm. The standard frame on this bike is flimsy, requiring reinforcement with stiffeners. It's good to have disc brakes and a thicker front fork. Tuning Izh Jupiter 5 is an exciting experience, and if you take this process seriously, the result can exceed expectations!
The Izhevsk motorcycle can certainly be considered one of the most elegant and reliable. Very lightweight and compact, this bike is capable of carrying incredibly large loads. So, the engine IZH Jupiter 5 able to withstand a load of 500 kg!
This is an excellent result. The bike itself looks sporty. The classic minimalism of the Soviet period was designed more for the youth of that time, but was popular with all age groups.
IZH has the ability to install a cargo module or a sidecar, which is very convenient when transporting passengers or massive loads. At the same time, it has excellent cross-country ability on any soil or road surface. However, in rainy weather, road grip is significantly worse, and in mud, stability problems can arise.
The unit is very unpretentious to weather conditions. In severe frost, up to -30 degrees, it is not difficult to start the engine. Even in extreme heat, there are no problems with overheating.
The characteristics of the IZH Jupiter 5 engine for the Soviet era were quite good. The two-cylinder engine produced about 25 horsepower, which allowed the bike to accelerate to 120 km / h. For comparison, the Ural and Dnepr motorcycles had an average maximum speed of about 110 km / h... However, reliability, like any Soviet bike, poses problems. Frequent repair of the IZH Jupiter 5 engine is part of the operation of the motorcycle.
Disassembly of the IZH Jupiter 5 engine, the video of which is presented below, is carried out not only as problems arise, but also for prevention purposes. For example, cleaning the carburetor is one of the conditions for maintaining stable engine performance.
The IZH Jupiter 5 engine circuit is simple even for inexperienced motorists. Therefore, during the repair there will be no difficult questions. In most cases, breakdowns occur due to the negligence of the owners who improperly use the moped and do not perform regular maintenance. For example, the wrong selection of oil for a particular season. So, if any part is worn out, it must be replaced.
Spark plug.
Motor cylinder head.
Motorcycle engine cylinder.
Exhaust system window.
Cylinder piston.
Cylinder piston ring.
Bypass system channel.
Motorcycle piston finger.
Crankshaft connecting rod.
Left half of the crankcase.
Leading star.
The crankshaft axle shaft is left.
Clutch spring.
Adjusting screw.
The clutch disc is pressure.
Pedal of influence on the checkpoint (gearbox).
Trigger pedal.
Clutch discs.
Gearbox fork.
Right half of the crankcase.
Motor cylinder head.
Motorcycle engine cylinder.
Engine flywheel.
Cover of the crank chamber of the Izh Jupiter engine 5.
Motorcycle generator.
Moto breaker cam.
Gearbox gears.
Gearbox gears.
Cam for automatic engagement / disengagement of the clutch mechanism.
It is sometimes impossible to find the cause of the breakdown after one visual inspection. In some cases, it is necessary to completely disassemble the IZH Jupiter 5 engine. But if you find out the reason, you can quickly solve the problem yourself. Here are examples of major faults and repair recommendations:
These are the main problems that can be encountered during operation. How to disassemble the IZH Jupiter 5 engine is described in detail in the maintenance book issued upon purchase. Everything stated in it is written in clear text, with diagrams and detailed instructions. Not only the repair of a Soviet unit is within the power of any owner.
There are many questions about how to assemble the IZH Jupiter 5 engine on your own, making its revision. For instance, installation of a more reliable carburetor or a more stylish and loud muffler is produced quickly enough without significant financial investment.
Tuning the IZH Jupiter engine with your own hands is possible if you have enough time and are enthusiastic. It is enough just to show perseverance.
The motorcycle has an advantageous ratio of cost, build quality and service requirements. Ideal for people on a small budget, and those who want a versatile technique. However, frequent breakdowns will be time-consuming. You should be prepared for this, as some bikes can be 40-50 years old.
