IZH two-stroke motorcycle engine - gas distribution

Intake, compression of a two-stroke motorcycle engine IZH

We start moving to TDC and block the purge channel on the left with the upper part of the piston. This creates a vacuum in the crankcase.

While the exhaust window of the cylinder is still open, exhaust and purging continue; after closing, compression of the combustible mixture begins.

The upward movement does not stop, and the edge of the skirt opens the crankcase inlet port. Through which the fuel mixture is sucked from the carburetor. Intake occurs.

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Greetings again, friends! I was sitting in the evening leafing through the catalog of spare parts for my assembled planet 5-01. At the same time, I decided to look through the manual and operation book and saw various configurations of this model there. Then I looked at a couple of books and became interested in how many different configurations of this engine there were. This is what I want to share with you.

1987 IZH 7.107 - Planet 5, everyone knows this motorcycle. It was produced for quite a long time and managed to earn sufficient respect among the people. So a new motorcycle, Izh Planet 5, appeared. Compared to the previous model, this one looked completely different, and although the engine was almost the same, there were also minor changes.

In the photo you see one of the first motorcycles of this model. As you can see, some components are still from Planet 4 - the engine cover, kick starter, gear shift foot. But this is exactly what Planet -5 originally looked like. Later, the magazine “Behind the Wheel” published an article about the emergence of a new “Planet”.

Now the motorcycle produced for the people had the same appearance as in the photo in the magazine. All improvements are described in detail in the article, so I won’t rewrite it a second time. Although I got Planet 5 already in 2015, its improvements after 6 years of owning Planet 4 are obvious. I especially liked the presence of one muffler. How more spacious it became on the left side! And you won’t hit the pipe with a kick again, and you don’t need to remove it if you need to get into the clutch. And the wiring, which has a minimum of plugs and connectors, is beautiful! In general, those who have driven both this and this will understand me. But of course I love my first motorcycle, IZH - Planet 4, it has more to do with it and I just became attached to the fours. It seems that the lyrics are over - we can move on. A new model has been released! At that time, buyers were also offered a luxury model. She looked like this.

Plastic shields, updated fairing, rear trunk. Cool equipment for that time! And everything is so harmonious in appearance. Time passed, progress did not stand still. In 1990, IZHMash offered three new modifications of this motorcycle! At this time, a new “Orion” fork, disc brake and cast wheels appeared. Their appearance on this model is closely related to the development of prototypes with an engine capacity of 500 cm3; in the previous post about these engines it was even written about this. The most popular of these modifications was, of course, “7.107-015”. Briefly about these new trim levels. IZH 7.107 - 014. Cast 18-inch wheels with drum brakes. Retail price 1085 rub. (not a bad price tag ;-))

IZH 7.107 - 015. New telescopic fork, disc brake. Cast wheels 19 and 18 inches. Retail price 1150 rub.

IZH 7.107 - 016. New telescopic fork, disc brakes, spoked wheels. Retail price 1060 rub.

In addition to this, the following modifications were added: IZH - P5 K.

IZH - P5 Tourist "7.108T".

IZH - P5 Lux "7.107L-015". Here is already the maximum set of everything that could stand at that time.

Another interesting point. On the Internet I also saw photos of motorcycles with engines painted black. And that’s how they were painted at the factory. Maybe they were preparing something else, but it didn’t work out. These are the models.

They also planned to launch the Planet 5 series with an engine capacity of 400 cm3. But during the tests it turned out that with such a volume terrible vibrations arise. And simply the engine resource will not be so long. You can look at this prototype.

Now, new models of IZH-Planet 5 were introduced only in 1995.

At this time, Planet 5-01 was developed, which I have been trying to assemble for 2 years. I'll describe it briefly anyway. The new model had electronic ignition and a permanent magnet generator. Now we could forget about cams and various adjustments of clearances. And it was possible to drive without a battery. A separate lubrication system made it possible to pour pure gasoline into the tank and independently supply the required amount of oil to the mixture. The rear brake drive changed the kinematics and looked more aesthetically pleasing. This planet received the index "01". This motorcycle looked like this as standard. IZH 7.107-01.

There are already much more complete sets. It was already possible to play with wheels, a fork, separate lubrication, “lux”, and cylinders. I'll show you the basic configurations. 7.107-020-01.

7.107-025-01.

7.107-040-01

7.107-012-01

The “Lux” modification usually added a fairing, trunk, and guards. Such a set could be installed on any of the above-mentioned motorcycles and only the letter “L” was added to the index.

Closer to 2000, things began to go not so well and modifications with the “01” index were no longer released so often. They began to install a standard engine from 1987, there were slight differences in the internals, but this was more related to the clutch drum, which was already fitted with a wide chain, and the left engine cover was different. There were also often planets with 2 mufflers. These are already late modifications.

As a result, we can conclude: where we started is where we came to. But still, if you take it all together, there was so much diversity! Of course, closer to the closure of motorcycle production, they were simply saving money on motorcycles: less chrome, a tank without rubber bands, just the bare minimum. Here, of course, I have not mentioned all the modifications, but you have seen the main ones. I'll save the rest for another post, where there will be models as well as specials. appointments and others. But still, some consistency in the development of this model can be noticed. Thank you for attention

Defining technical characteristics of Izh Planet-5

Multiple videos of Izh Planet-5 are “live” confirmation of the popularity of the cruiser, and with proper care, its durability. A huge advantage of a motorcycle is its ability to allow any tuning transformations .

Modernization of almost any spare part is painless, and the final result makes you feel genuine pride.

The qualitative characteristics of the motorcycle confirm its necessity and indispensability in suburban conditions.