In this article we will look at all the stages by which tuning a Minsk motorcycle can occur - the most affordable and popular motorcycle in the USSR. We will reveal the secrets of tuning the Minsk 125 engine, increasing its power, maximum speed, as well as improving its appearance.
Minsk 125 is one of the most popular famous Belarusian motorcycles, which have been produced since 1951. They have proven to be unpretentious, cheap to maintain, and are also famous for their reliable gearbox. This motorcycle is widely used in training and passing exams for category A, as well as in the “ Minsk cross 125 ” version for teaching the basics of motocross in many sections of the country. Minsk's foreign competitor is the Yamaha YBR 125 road motorcycle, which is perfect for beginner motorcyclists.
Tuning Minsk can be divided into two main parts:
- Engine tuning Minsk
- Appearance tuning
Engine tuning Minsk
An important principle of increasing motorcycle power is increasing cylinder volume . Since the motorcycle discussed in our article has a light, small-capacity engine, a couple of horses can be raised by boring the cylinder walls and replacing the piston with a larger size. At the same time, it will be useful to use new rings coated with chrome, as they minimize friction on the surface of the cylinder, thereby increasing engine life. The next step to increase power is to replace the fuel system. The standard carburetor has a primitive design and does not allow the engine to get maximum power, so you can replace it with a Keihin PWK flat-choke carburetor .
Compared to analogues, its flat throttle allows you to speed up the flow of the intake mixture by 30%, as well as an additional jet that comes into operation when the gas is fully opened, which, together with a good air filter, is an excellent do-it-yourself Minsk motorcycle tuning. In order not to disrupt the operation of the new carburetor, it will be useful to treat all intake channels from rough deposits and roughness that impede air flow.
It is worth paying attention to two main ways of tuning a Minsk motorcycle:
Firstly , the intake system can be significantly improved by installing a reed valve at the inlet of the cylinder after the carburetor. The reed valve will prevent the mixture from being pushed back into the fuel system when the piston makes its power stroke.
Secondly , replacing the standard muffler with a resonator made of sheet steel will not only allow you to lose weight, but also very significantly increase the power at medium and high engine speeds of the Minsk 125 motorcycle. Such tuning Minsk will not only improve power, acceleration and maximum speed, but and will make your faithful friend much more economical!
A good preventative measure for the engine would be to replace all its bearings with imported analogues. Due to the increased power of the motorcycle, the load on them will increase. Any Japanese bearing company has decent workmanship and a huge selection.
Another easy way to increase engine power is to increase the compression ratio . To do this, you need to trim the surface of the engine cylinder head by a couple of mm, this can be done on a lathe, or manually, using a piece of glass for this, placing it on a flat table, you get a perfectly smooth surface on which a sheet of sandpaper is glued to double-sided tape. Then the metal layer is ground off in a circular motion. After such tuning, the compression ratio in the cylinder will increase, which will also allow for fuel savings and increased power of the motorcycle. In this case, you will need to fill in 92nd gasoline.
Due to the increased power, it may be necessary to improve the clutch basket. To do this, remove the standard clutch discs, process them to a thinner state, removing 2 mm of metal from each disc, which will allow you to add several more of these clutch discs. Since their number will increase, which means the contact area will become larger, the efficiency of transmitting torque to the wheel will increase.
Tuning Minsk is not limited to the above. Installing a microprocessor-based non-contact ignition system (MPSZ) will improve the response of the Minsk motorcycle engine to the throttle, eliminate problems with starting the engine in cool weather, and also allow for smooth engine operation throughout the entire range, due to the fact that the spark occurs in proportion to the increase in the number of revolutions crankshaft The higher the speed, the earlier the spark occurs. Cam ignition will never achieve such results; it is not reliable and often goes astray.
Denis Blishch. Private opinion
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If you want to learn something new, open Google and choose from a variety of courses. There is only one problem: the unregulated market has attracted not only non-professionals, but even scammers and crooks. They take an advance payment and do not start classes, do not fulfill their own promises, and in every possible way prevent the return of money. Read about such reviews - your hair will stand on end. In fact, reviews nowadays have become the only filter through which you can make at least some informed choice. Well, provided that the reviews are not written by the course owners themselves. Have you heard about the “Leader” school from Minsk? Read it.
"ATTENTION! Know that the language courses “English Dad” is the same Leader. The founder of the Leader is Sergey Sulimov, who is also the founder of the “English Dad” courses. So be careful!!! Don't fall into the hands of this scoundrel and don't give him your money. He specially created the “English Dad” courses, so that those who have already been burned and hear the name “Leader courses” - they bypass this center. So Sergey Sulimov took a cunning path and decided to deceive us so that we would go to the “English Pope”. Now we are warned!!!, which means we are armed!!!” – a typical cry from the heart from the Internet. There are so many such “screams” that it is impossible to ignore them.
“Contact” has even created a special page where such complaints are accumulated. Everything is about English Papa, “Leader” and Sergei Sulimov. On other review sites the situation is better if their policy provides for the publication of comments, both negative and positive, but there is still plenty of trash.
I don’t know how you can run a business with these waterfalls of negativity. There's such a syllable here!
“Those affected by the Leader’s actions, join the group! Those who are ready to fight for their rights, write, we will unite to file a collective complaint to the Minsk City Executive Committee, the prosecutor's office, and the state control committee. It's time to stop this chaos!! Tell your stories, the leader protects reviews everywhere, but they can’t shut everyone up!!!”
A little more - and on an armored car.
Okay, you might think that I went to study at Leader and now I’ll whine like a blogger, like they cheated me out of thirty rubles?
I went even further. I went straight to Sergei Sulimov’s office and asked him for everyone: what’s going on?
Meet Sergey Sulimov. Rushing towards you on a surfboard!
His “Leader” and English Papa are located in the center of Minsk on Komsomolskaya Street. On the attic floor, in a large office, there is a large table, and there are a lot of papers on the table. But these are not reviews of “Leader” courses or claims from upset clients, but direct court rulings.
“In the name of the Republic of Belarus... decided to recognize the disseminated information as discrediting the business reputation and the obligation to refute it.” The defendant is VKontakte LLC.
Or there is this, to the resource 100kursov.by and its owner. The Belarusian created a website that is like a showcase of various educational courses in the country. Some people came to this site and left reviews for the “Leader” courses, all of which were negative, except for a couple of individual ones
