Technical characteristics of the Izh Planet 5 motorcycle

Pleasant advantages

The engine itself is not demanding in operation; it produces power up to 20 horsepower. It is refilled, like most representatives of this model range, with a gasoline-oil mixture, ensuring good treatment of the piston group and bearings.

The Izh Planet-5 motorcycle has a small fuel tank, only 17 liters , but this does not increase its appetite. Consumption in the city for every hundred kilometers is equal to four liters, and on the highway at maximum acceleration, all five.

The oncoming flow perfectly cools the engine, protecting it from overheating. At the front there is a standard telescopic fork with two shock absorbers. At the rear, the pendulum suspension is also equipped with a pair of shock-absorbing mechanisms.

Front brakes are manual, rear brakes are foot controlled, the brake itself is shoe brake. In the photo of Izh Planet-5, small eighteen-inch wheels are clearly visible, and the design itself is quite light and does not reach two hundredweight.

Weaknesses of the IZH-P5 engine

• Air filter;
• Cylinder-piston group;
• Transmission.

More details about the weak points of the IZH-P5 power unit...

Air filter. To prevent dust from entering the engine, frequent washing and oiling of the filter element is required. Installing a paper filter would reduce the time spent on engine maintenance during maintenance and would improve the quality of cleaning the air supplying the carburetor.

The CPG wears out after 20,000-25,000 km due to the lack of water cooling.

Transmission . Over the years, due to wear and tear, the gears switch off on their own and adjustment does not eliminate the problem. In this case, it is necessary to overhaul the gearbox and replace worn out parts.

Characteristics of the IZH-P5 motor

Technical characteristics of the motorcycle

Despite some shortcomings in the electrical circuit of the motorcycle, its design, advantages and technical characteristics were the main factors in the popularity of the IZH Jupiter 4. Among the key characteristics and parameters, it is necessary to highlight:

1. Passenger capacity – 3 people.
2. Engine: type – petrol two-stroke,
3. fuel – a mixture of gasoline and oil (1/33),
4. type of lubricant – mixed,
5. cooling method - air,
6. number of cylinders – 2,
7. volume – 0.35 l,
8. power – 28.0 l. With.

Disadvantages of the IZH-P5 engine

• Loud in operation;
• Increased vibration;
• Oil sprays from the muffler;
• Long acceleration;
• High fuel consumption;
• Small resource;
• Strong return from kickstarter.

Loud operation has a negative impact on people around (interferes with rest), which causes corresponding reactions towards the motorcyclist.

Increased engine vibration is felt throughout the motorcycle, especially with your hands on the handlebars.

Oil splashes from the muffler, which, when driving, falls on the back of the driver or passenger. This disadvantage is eliminated by installing a stainless steel ladle of the appropriate diameter at the end of the exhaust pipe. The ladle should have a sector cut out in advance, which should be in the lower part when mounted with screws. This modification will prevent oil from getting onto the back, and the exhaust will be directed downward.

Long acceleration. Planet 5 with a sidecar takes longer to accelerate. The increased duration during acceleration is especially noticeable on a motorcycle with a sidecar.

High fuel consumption. The engine is not fuel efficient and the reason is primarily in the design of the two-stroke engine.

The resource is limited to an interval of 20-25 thousand km

Strong return from kickstarter. To prevent the kickstarter from hitting your leg, do not accompany the kickstarter with your foot when it returns to its original position. The impact on the kickstarter when starting the engine should be sharp and strong.

PS. Dear “Planetovod” motorcyclists! You can ask a question or add reviews and information on the weak points and shortcomings of the IZH-P5 motor in the comments.

Improving the IZH motorcycle

Despite the high overall reliability of the motorcycle, the most frequent breakdowns occurred in electrical equipment. First of all, this was due to the 12-volt electrical circuit used on the IZ Jupiter 4, which had not yet been tested and had low reliability, so during repairs even experienced electricians had to use special colored wiring diagrams.

The most common malfunction was loss of connection or oxidation in numerous detachable contacts, which were widely used in the IZ Jupiter 4 wiring. Such connectors are now very widespread in electrical equipment for use in both motorcycles and cars, but then for many motorcycle owners the question was how repair such contacts with your own hands.

Dust, dirt, water and snow, from which a motorcycle is much less protected than a car, were the main causes of malfunction, therefore the main decisions of the owners of IZ Jupiter 4 were aimed at protecting such connections in the wiring diagram.

For this purpose, the contacts were cut off and the wires were soldered together directly, and the contacts were also wrapped very tightly with electrical tape or sealed with plasticine. This made it possible to protect the connections from external harmful influences.

Such solutions did not add beauty to the appearance of the motorcycle, but even without this, many owners sought to make their IZH Jupiter 4 individual and, for this purpose, performed tuning with their own hands. The most common among such works were considered:

• windshield replacement;
• installation of other muffler pipes;
• installation of enlarged wings;
• use of enlarged mirrors;
• changing the shape of turn signals.

Such simple operations made it possible to make a particular motorcycle different from the production version of the fourth generation of Jupiter.

A little about tuning

Amateur modifications can be seen in the video of the Izh Jupiter-5 motorcycle quite often. What do motorcycle enthusiasts most often look at when they are about to magically transform their iron bike:

• replacing ignition contacts with electronics;
• the presence of a tachometer will not hurt at all;
• a leg on the side instead of mounting the engine is also never superfluous;
• patterns in the exhaust of “cigarettes” will change the “voice” of the motorcycle;
• adding extra carburetors will give more power, but will also increase gas mileage;

Fork rubber front shock absorbers, other mirrors, turn signals and the removal of a trunk give the Jupiter more charm.

Izh Jupiter 4 - technical characteristics, improvement

In 1980, the Izhevsk Machine-Building Plant launched the IZH Jupiter 4 road motorcycle for mass production. The fourth generation replaced its predecessor IZH Jupiter 3 on the production line and was produced until 1986.

Jupiter 4 could confidently move on roads with any surface, and its key feature was the ability to be used together with a passenger side trailer, which made it possible to transport two passengers at once or use the trailer to transport small loads.

It is the increased passenger capacity that has become an important component of the popularity of motorcycles. In addition, it had the following advantages:

• good dynamic characteristics;
• ease of repair;
• high cross-country ability;
• affordable price;
• high reliability;
• low sensitivity to fuel quality.

The existing disadvantages of IZH Jupiter 4, according to reviews from owners, include:

• poor assembly quality at the factory (connections not tightened, poor contacts, oil leaks);
• violation of synchronization in the operation of the engine cylinders;
• poor wiring diagram;
• frequent overheating of the engine when fully loaded in warm weather.

But due to the corresponding advantages, the motorcycle was most popular among rural residents as a universal vehicle.

Design Jupiter 4

The popularity of the motorcycle among rural residents was due not only to the above advantages, but also to its rather simple design, which consists of the following main components and assemblies:

1. Engine. Clutch.
2. Transmission.
3. Carburetor.
4. Two mufflers.

The design features of the motorcycle include the installation of a more powerful engine, the use of special rubber bands for shock absorbers to reduce engine vibration on the frame, and the travel of both wheels was increased to increase cross-country ability. For the first time, a 12-volt electrical circuit was used on IZ Jupiter 4. The optics and light signaling have also been improved.

The simple design of the motorcycle, as well as the traditionally broad unification of all models of the Izhevsk plant, including the IZH Planet 4, which ensured high availability of spare parts, made it possible to carry out repair work in rural conditions.

To increase the service life and reliability of the motorcycle, especially in dusty rural areas, it was necessary to perform timely maintenance. It is for such conditions that the plant has established a fairly small frequency: maintenance No. 1 - every 2000 km, maintenance No. 2 - every 4000 km.