Hvz bicycles DIY repair

In detail: bicycles hvz do-it-yourself repair from a real master for the site my.housecope.com.

Breeding "crocodiles" on the basis of bicycles HVZ originated in the 60s and remains popular to this day. The number of spare parts and new fashion trends in the development of this fascinating creativity is increasing every year. Image - Bicycles hvz DIY repair

Modernization of bicycles based on the released models "Ukraine" "Sport", "Tourist", "Champion", "Start" by the Kharkov Bicycle Plant.

This factory began producing bicycles in 1923. The first craftsmen who set up production came to the factory from Riga. Since that time, the production of bicycles began to increase annually until the Second World War. Millions of bicycles were produced in the pre-war years.

The interrupted production during the war was restored from June 1945. They began to produce women's and children's bicycles, which all improved every year and both the demand for them and production increased. High-end sports models were produced.

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Obviously, the gift of modeling and construction is inherent in everyone who dares to change their bike. What crocodile masters strive to improve. What kind of crocodile they want to get out of their bike.

Initially, it seems that improvements were required for the bicycle wheels, which bent into eight in a serious accident. Then there was a need for improvement in racing sports bicycles, in which each inventor strove to increase the speed characteristics.

Firstly, when you read crocodile blogs you can already reap a lot of benefits for yourself. After all, you, as a cycling enthusiast, know what characteristics you will achieve by replacing spare parts.

Video (click to play).

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Improving speed performance, reducing susceptibility to obstacles on the road, cross-country ability in hard-to-reach mountainous areas. Masters of their craft will certainly strive to educate dummies how to sculpt a cool bike out of an old shabby and well-worn bicycle.

Even engineers in the field of bicycle building are guided by the advice that crocodile breeders give each other, it's like testing prototypes before mass production of a serial model.

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  • Steering wheel
  • Brakes
  • Front and rear bushings
  • Rims
  • Knitting needles
  • Saddle
  • Tires
  • Installing the motor on the bike.

The parts that are usually sold now are made in China.

The following are subject to replacement for the upgrade:

  • wings,
  • horn bells,
  • trunk bags,
  • steering wheel bags,
  • lanterns,
  • mirrors,
  • front and rear bushings.

If you need tools for crocodile practice, you need to purchase a special tool kit. And in the service center, you can order services for lubrication, adjustment, if you cannot do something yourself.

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Collective farm tuning, such an expression stuck to bicycles pasted over with various bright stickers, with an electrical tape wrapped around the steering wheel, wound on the spokes with multi-colored wire, in general, that modernization that does not improve speed or physical and technical indicators, but simply changes the appearance of a familiar bicycle.

But installing headlights on a bicycle, for example, or installing diode lighting, is no longer considered collective farm tuning. And also the installation of bicycle computers, rear-view mirrors, replacement of the steering wheel, wheels is not a collective farm tuning, as they are a functional improvement. Bicycle upgrade should not only make it stand out from the crowd of brands of the same name, it should increase its performance, endurance, capacity, durability.

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What can you say to beginners crocodile breeders.You can browse through a bunch of crocodile forums, but until you start making your first crocodile with your own hands, you will not understand anything. And even if you chose old trash as a basis, you can make a real swallow with the help of refinement.

It may very well be that you have an old Soviet bicycle lying around on the mezzanine (in the closet, in the garage, in the country house, ...). It may also be that you are diligently paying interest on a loan for a new yacht right now and there is no longer any extra cash left for a new bike. Or you are purely aesthetically pleasing to look at the bicycles of that era. In this case, you have an amazing opportunity to bring your old bicycle back to life and flaunt the streets of your hometown, the fields and villages of your home country on a unique machine!

As a rule, they are engaged in the revival of old bicycles of the HVZ (Kharkov Velo Plant) production: Sport-Highway, Start-Highway and Champion-Highway, Sputnik, Tourist, Champion, Starton. The revival and modernization of other bicycles or bicycles made in Russia, Belarus, Ukraine during perestroika is also possible, but it is of less interest due to the poorer quality of the “source material”. However, the only limitation is your desire.

First of all, since the bicycle has survived to this day since its release, for example, in the 60s of the 20th century, this already speaks of its strength. Modern bicycles with aluminum parts are lighter but wear out much faster than their steel predecessors.

Further, the degree of modernization required depends on the condition of the particular bike and your desire to modernize it. The better the initial state, the less you need to change. In most cases, the wheels are completely changed - the technologies do not stand still, and they are very susceptible to wear and tear on the rim, they are hardly preserved in good condition. The greatest difficulties are caused by the carriage and shifters.

A correctly assembled carriage and connecting rods on the wedges do not loosen up, do not play, no matter what those who did not really use them say on the forums. Straight arms decide everything. But the carriage is one of the most worn out units, so it makes sense to replace it with a modern cartridge one. This is where the difficulty arises - the fact is that at different times different manufacturers made carriages of different diameters with different types of threads. It is not at all a fact that a modern cartridge can be installed without additional effort. It is often necessary to cut the thread with a special tap. Sometimes special adapters are made from a larger diameter to a smaller one.

Difficulties with shifters are as follows. These are sports bicycles or those close to them with a curved "ram" road handlebar. Mountain brake levers and shifters available in almost every store are not suitable. The most convenient way to use the combined road monoblocks is shifter + brake lever. But they are expensive, and usually they seek to update the bike with minimal investment. In addition, bicycles of those times were supplied with 3-5 stars, and now less than 7 is difficult to find. Hence the need to either unbend the frame, or select shifters for working with a ratchet for 5-6 stars, or come up with original combinations of popular components for mountain workers.

Sometimes, in addition, they weld on the frame to attach V-break brakes, bottle holders, mounts for additional switch cables. This is already a matter of taste / needs. For example, vibrake brakes are easier to find than suitable U-shaped tick brakes if family members have fallen into disrepair. If there is an opportunity and does not care too much about the appearance, then it is easier to weld the mounts than to look for cantilever brakes with long “legs” (the distance from the mount to the rim is more than 5 cm.).

The result of a neat upgrade looks very attractive (the grace of a thin steel frame and narrow wheels) and rolls better on tarmac than an MTB.Of course, the bike is not for competition - sports and extreme loads require a completely different technique. As a rule, such bicycles after recovery are closest to the class of tourist (touring, "touring") or road bikes for training (weight from about 11kg). However, variants of a city bike with a high seating position and a straight handlebar are also not uncommon.

These upgraded bicycles are often referred to as “crocodiles”. Why it is so difficult to say. Maybe the name came from the fact that HVZ bicycles, popular for modernization, were originally green. Or the first ones restored were so scary. A very plausible version is that this is how FIDO called any old-school bike modified by the owner to something unique (now it would be called a custom bike), later the name spread to all modernized bicycles.

It may seem that the restoration of old bicycles is exclusively domestic entertainment. Still, HVZ. but as you saw in a couple of links above, English-speaking countries are also busy reanimating old bikes and customizing.

In conclusion, a few examples of "crocodiles" describing the process of their modernization.

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A very detailed description of the retrofit process for this bike from a professional workshop:

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Description of the modernization and its discussion on the forum.

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Discussion: there is also a link to large photographs of individual nodes.

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Description and discussion on the forum:

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Modernization towards a hybrid

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Another all-terrain vehicle.

To access the main interactive services, it is enough to log in without registering on the site:

The main stages of setting the rear derailleur, a detailed description of possible problems and features.

On the one hand, absurd in essence, but on the other - a work of art, the old bicycle advertisement is worthy of attention and detailed study.

The second name for the cycle track.

I would like to say right away that I am not the author of these works, I just found articles on the Internet, where I don’t remember specifically, but they helped me.

The topic of reanimation of products of the domestic bicycle industry comes up with enviable regularity. But first, a small excursion into history. As you know, throughout the USSR, one class of single-speed bicycles was produced - entry-level road bicycles, and several closely related multi-speed bicycles, which were considered the height of engineering thought, but in fact were foreign developments of the mid-50s of the last century. Only a few representatives of the latter are suitable for alteration.

There were two branches of bicycles - tourist and road. The first is represented by "Sputnik" and later by "Tourist", the second is the well-known "Start-Highway" and the so-called special order - "Sport", "Champion-Highway", etc. I must say right away that practically nothing from the standard hitch can be used ... We are left with only the frame and the fork. The best ones are for road frames, more or less for Sputnik, while Tourist is actually made of “water pipes”.

Really, it makes sense to invest only in the "special order" and the old "successful" frames "Start-Highway", because at the end of the 80s the quality of the latter dropped dramatically. "Sputnik" is also of a very mediocre quality frame, but it has an indisputable plus in front of road frames - these are wider rear stays, allowing rubber up to 37 mm wide (for pure road frames, the limit is 32 mm).

A couple of words about the hinge plate of the "X-Be-Three" brand. The whole world uses inch standards for threads and diameters for bicycles - this is how it happened historically. But the USSR has always stood apart, so all foreign developments were redrawn for metric threads. Hence all the problems. Nothing is suitable for our business, only the frame, the fork, as well as the stem and the steering column will remain - due to their aforementioned non-standard.

In principle, it is possible to replace this too, but this is a very expensive operation. Moreover, other columns work quite well for themselves.The exception - that is, what can be kept - is some "custom" components. These are bushings, as well as aluminum systems for a square (compatible with imported carriages) - milled Izhevsk and old Kharkov ones. Cast Penza ones are not good - they break. Also, do not use Penza offsets - for the same reason. Casting is unusable. Better iron HVZ, although it is unrealistically heavy. Wheels, brakes, cables, shirts - everything will not work. It is probably unnecessary to talk about the system, the carriage and the pedals. The steering wheel, brake levers, shifters are just uncomfortable. If you really want to, you can, of course, leave the bushings and even the brakes, but the HVZ bushings are inferior in resource even to the five-dollar Taiwanese ones, and the brakes are very difficult to set up well. So we only leave the frames, fork, stem, steering column. Saddle and seatpost available on request. It does not affect the maximum speed, but they will provide an extra kilogram and a half.

The most ordinary bicycle "Tourist" of the Kharkov Bicycle Plant with four gears. The front fork, of course, is rigid, there were no others in the USSR at that time. And in the world they were still very rare. Compared to the then single-speed "road" bicycles, this was a thing, although knowledgeable people argue that compared to the Start-Shosse bicycles of the 70s, these bicycles were already significantly inferior both in weight and strength (in terms of running characteristics - in definition).

So, let's move on to the bicycle repair method - "Tourist", "Start-highway", "Sport":

Due to the lack of parts (the plant in Ukraine has not been operating at full capacity for a long time), and those parts that have been produced in crumbs in recent years are of disgusting quality, but at a price they are not inferior to imported ones.

First of all, we leave the carriage shaft of the "wedge" system, this is a relic of the past and go to the carriage shaft "square". All new and modern systems from leading manufacturers are designed for "square". To do this, it is necessary to install the "cartridge" shaft (it is better on industrial bearings its resource is very long - from 3 to 10 thousand km).

1. When buying a set of front connecting rods, the first thing we do is determine (number of sprockets):

  • There will be road stars
  • or combined.

2. We measure the seating depth on the connecting rod from it will hang the length of the carriage shaft "cartridge".

  • Removing the connecting rods
  • We disassemble the carriage, turn out the cups.
  • Take a tap 35 × 1.37 - 24 and cut a new thread.
  • Lubricate the new thread with liquid oil.
  • We screw in the "cartridge" (Industrial Bearing). Shimano UN-25

4. Install new connecting rods. The whole procedure takes about an hour of work.

5. We adjust the gear shift.

If funds allow, we install a carriage cartridge and a foreign-made system. It could be the same Shimano Tourney, Altus or Sora. With such gears, you can already quite safely go to a decent rise.

Since the bike is quite playful, it is better if the chainrings have the following set: 48-38-28 (30). When changing the connecting rods, keep in mind that there is a certain development on the parts you have left (the chain is stretched - the rear sprockets are sharpened - the rear caliper is worn out), it all depends on the mileage and the intensity of use.

If the chain from "Start" can work at the very least on a five-fold ratchet, then a narrow imported chain (width 7.1 mm) is already needed for 6-7 stars behind. We used a Shimano UG50 or UG51 5/6 speed chain. 6/7 speeds - IG-31 Acera or IG-51 Alivio. 7/8 speeds - IG-70, IG-90, HG 73 or HG93 LX / XT.

If there is a great desire to save money - leave from "Start". What should be borne in mind - both bushings from "Start-Highway" and unpretentious foreign ones have very primitive protection from dirt and water, therefore, with intensive driving, you will have to sort out the bushings a couple of times a year. In addition, the eccentric fastening of the rear wheel is not very reliable on this hub.

Or we buy a bushing from a foreign manufacturer.The most common bushings are for the threaded connection of the rear sprocket block and for the cassette. The cassette bushings should be considered more reliable.

If you don't have enough money, bet any. If so, start with at least Shimano TY40 or Altus. Russian duralumin are too fragile, iron from HVZ is quite reliable, although extremely primitive.

When installing, pay particular attention to the limiters of the switch movement (such bolts). A favorite pastime for unadjusted derailleurs is to fly into the spokes at the most inopportune time. It should be borne in mind that if you purchased a ratchet or cassette with a large rear sprocket for 34 teeth, you need a uniquely foreign derailleur adapted to work with such a sprocket. Outwardly, such a switch has rollers with a larger diameter.

One of the most essential points. There is no need to spare money here. The choice of 28 ″ rims in Moscow is not limited, you can buy almost any rim or order the right ones and wait a while. We definitely do not take the products of Russian factories. The extras they produce are of disgusting quality.

Bicycle rims "Tourist". First, it seems that they no longer exist in nature. Secondly, even if they stayed somewhere, it is better to invest in foreign double rims. Single and double - foreign. Avoid using narrow clincher (made especially for narrow racing tires) rims. In this case, you will be forced to use only racing tires (622-20 / 23/25), and this will greatly affect the bike's flotation.

Rims with a width of 18-21 mm are suitable and preference should definitely be given to double ones.

During operation, a bicycle, like any mechanism, requires personal care. Of course, it is not always possible to take your iron horse to the workshop, and is it worth it, when in 80% of cases, you can repair the bike yourself. In the remaining 20%, bicycle repairs in Moscow, or in another large city, can be entrusted to an experienced specialist, for example, if, during an unsuccessful collision, mechanical damage to the frame and other parts has occurred. After the purchase, it is important to take care of the parts that experience the most friction.

After buying a bike, what matters is the initial treatment of all parts subject to the greatest friction. Note that places greased with grease or oil accumulate dust and dirt, which destroy the mechanism, working like an abrasive mass. Chains, bearings, and other parts simply wear out faster, due to the fact that the coefficient of friction increases. In this case, friction can increase several times. It all depends on when the bike was last serviced and repaired.

In order to do your own bike repairs, you will need to rent a room. You will also need a whole bike repair kit:

  • bicycle repair keys;
  • Mallet;
  • Several pliers;
  • A set of various screwdrivers with a spatula and a cross;
  • Scissors and clamps;
  • A set of end caps;
  • Bicycle repair rack.

You can buy a bicycle repair tool both in a regular bicycle parts store and online at specialized sites.

If you learn how to repair a bicycle with your own hands, then you can open your own workshop. So bicycle repair is popular in various cities of Russia and Ukraine. Basically, bike services are opened in large cities with a population of 200 thousand people or more. It is most profitable to open bicycle repair shops in St. Petersburg, where groups of specialists work in their narrow focus. Some craftsmen are engaged in the repair of sports bicycles. Others are working on the restoration and repair of old bicycles. Still others are directly involved in the repair of mountain bikes with their own hands in mountainous areas.So there are many bicycle repair shops in Stavropol, located in the administrative center and large cities of the region, specializing directly in the repair of mountain bikes. Similar highly specialized workshops are located in places with variable (flat and mountainous) terrain, for example, numerous bicycle repair shops in Krasnoyarsk, located in the cities of the region, as cycling in the wild is popular in this region.

Where to open a bicycle repair shop. Bicycles for children of various ages and for adults are being sold in large quantities in various cities. Depending on the type of product sold, offer the appropriate type of service, for example, repair of children's bicycles in Moscow. Considering that bicycles for children are bought in large quantities, the repair of children's bicycles can become your niche in the business. As an example, you can watch the video "Do-it-yourself Stork bike repair" as a variant of the developed system of maintenance and repair of tricycles.

Cycling tourism in Russia is popular in various regions, and many amateurs are fond of their hobby not only in the warm season, but also in autumn and winter, respectively, repairing bicycles for tourists will be a profitable business all year round. However, study your market for services, supply demand, direct and indirect competitors. In a word, not only a business plan, for example, for the repair of bicycles in Yaroslavl, taking into account the costs and a complete analysis of the market.

After you analyze the market for bicycle repair and customization services, you can decide on the cost of services. To begin with, set the prices for bicycle repairs a little lower than average, then after you spin up, you can raise the cost of the services provided to profitable ones.

If you want to go into business, then do not forget to purchase additional equipment for repairing your bicycles. We recommend purchasing:

  • Chain squeeze;
  • Carriage puller;
  • Ratchet and socket wrenches;
  • Remover for brake disc cassette (for repairing shimano rear derailleur);
  • Key for removing and installing spokes;
  • Pump;
  • Set for bleeding the brakes, hydraulic;
  • Oil syringe;
  • A glass for measuring oil;
  • Spare set of tubes and tires.