How to make a homemade bicycle with a motor. Bicycle with a gasoline engine: advantages and disadvantages. Do-it-yourself bicycle with a motor: installing a motor wheel

A bicycle is a vehicle that allows you to simultaneously get to the desired point, take care of your physical fitness and turn every trip into a walk. There is no need to stand in traffic jams or crowd into a crowded subway car on your way home from work. It is environmentally friendly. But it also has a drawback: not everyone can overcome long distances. Still, physical fitness may not allow you to travel several kilometers without stopping. But a solution to the problem can always be found. In this case, you can make a motorbike with your own hands.

Peculiarities

Motorbikes can be purchased at the store. But they are quite expensive, and appearance however, it is far from what is desired. And this design weighs about 20 kg. This weight will make the journey much more difficult if the engine fails and you have to pedal. Such disadvantages can be avoided if you make a motorbike with your own hands.

This type of transport was widely popular among teenagers during the Soviet Union. But modern capabilities and tools make it possible to significantly change an ordinary bicycle and create an original means of transportation. Experienced DIYers, when asked how to make a motorbike with their own hands, will answer that it is very simple. Almost anyone can cope with such an activity.

Types of engines

When getting started, you need to decide which motor is best for your bicycle. They come in two types:

• Electric, which with the advent of compact but capacious batteries are becoming increasingly popular.

• Engines internal combustion, which are the traditional option.

To create homemade motorbikes gasoline engines can be used from a lawn mower, chainsaw and other tools and units.

Engine selection

Most often, an old chainsaw is used as the basis for making a motorbike with your own hands. Or rather, its engine. But here there are some restrictions. You should not take engines from small and light saws. They have too little power. Suitable for a bicycle is a motor whose power is above 2 liters. With. (or 1.5 kW). And the higher this value, the better it will be. But even at this value, the bike will be able to accelerate to 30-35 km/h.

When choosing an engine, you should also pay attention to the volume. In accordance with the Vienna Convention, this value should not exceed 50 cubes. Only in this case, rights and registration will not be needed vehicle. The motorized bicycle will fall into the category “bicycles with a suspended engine.”

Another advantage of such an engine is the absence of the smell of gasoline. The motor has virtually no smell, which allows you to store the bike at home. But there is also a drawback. It consists in the characteristic sound of a working chainsaw. The sound of a running engine will accompany you throughout the entire trip.

Connecting individual parts to the frame

To create a motorbike, you can use any rusty, folding one. A motorbike requires only a strong frame as a base. If one is not available, you can make it yourself. To do this you will need several pieces of metal pipe.

The motor is attached to the frame at the junction of the lower and seat tube. This is the most optimal, but not the only option. Sometimes you can see a motor mounted on the trunk. The main thing is that the fastening is reliable. During operation, vibration will be felt, due to which the motor may fall if it is poorly secured. It is recommended to use metal clamps for fastening. A set for a motorbike may include special perforated mounts. But their use is not at all necessary.

In addition to the engine, it is necessary to attach the battery and fuel container to the frame.

Connecting parts

Attaching all the parts individually to the bike frame is only half the job. Next, you need to connect all the elements into one system. Otherwise, a homemade motorbike will lose all its new capabilities.

The first step is to connect the motor so that it transmits rotation to the wheels. A special mechanism must be provided for this. There are two options for these mechanisms: with pulleys or chains.

Includes a pulley system. This is a simpler option. One pulley fits onto the motor shaft. The second is attached to the rear wheel hub. A tension belt is put between them. The disadvantage of this option is the shorter life of the belt (which stretches faster) compared to the chain. It is worth noting that V-belts in terms of their characteristics (service life) are not inferior to chains.

In the case of a chain drive, rotation from the engine to the wheel comes through the chain. On one side it fits onto the rear wheel sprocket. On the other hand, on a gear mounted on the motor shaft. Chain drives are more durable than belt drives. But it requires regular care.

The battery is connected to the engine ignition and brake handle. Next you can install exhaust pipe. You can do without it, but the exhaust fumes will spoil the trip.

Electric motor installation

Using a gasoline engine when creating a motorbike with your own hands “kills in the bud” the idea of ​​an environmentally friendly vehicle. Therefore, models with electric motors. The development of modern technologies makes it possible to do this.

The principle of installing an electric motor is similar to that of gasoline engines. For this you will need, in fact, the motor itself, a battery, control parts, and a controller.

Motor wheel

Another option that can be chosen when creating a motorbike with your own hands is installing a motor-wheel. This option is suitable for those who are versed in electrical engineering. Connecting a motor-wheel requires certain knowledge, without which you can assemble electrical diagram it will be difficult.

The motor-wheel sales kit includes controllers, front and rear brake handles, the “Pass” system, charger.

The battery produces direct current. The controller converts direct current into alternating current, which, in turn, will drive the wheel motor. When the wheels begin to rotate, the electric motor is activated. The “Pass” system notes this. There is a microswitch on the brake levers. It is necessary in order to cut off the power supply from the motor to the wheels during braking.

Performed according to the following steps:

• The bicycle turns upside down. The rear wheel is removed. In its place will be a motor-wheel. It is attached in such a way that the outgoing wires are on the left (when looking in the direction the bicycle is moving). Due to this, the direction of rotation of the wheel is adjusted. If the sides are swapped, the wheel will “travel” in the opposite direction.

• The controller and battery are attached to the frame. The controller must be well isolated.

• Next, the remaining parts are installed and connected.

Collecting electronic circuit, it is important to remember that the battery is connected through a fuse (20 A is sufficient). It will protect the system from fire in the event of a short circuit.

Conclusion

As you can see, there are several ways to make a motorbike with your own hands. Each of them has its own advantages and disadvantages. Installing a motor on a bicycle does not interfere with riding in the usual way (pedaling). To do this, you just need to turn off the motor and clutch of the motorbike. This is very convenient when you want to take a leisurely ride and work on your physical fitness. A variant of a bicycle equipped with an engine (regardless of its type) is good option for people choosing an active lifestyle. It is both a recreation and a way to get around the city (and beyond).

About a year ago, my father and I came up with the idea of ​​how to turn a regular bicycle into a bicycle with an electric motor. Everything necessary for this was purchased, and the work began. We changed the frame and completely rebuilt the entire bike. After we finished, we were more than satisfied with the results - we had a 48V electric motorbike with 15 hp.

We purchased a Felt beach cruiser. We chose it because it has the right shape - we needed a bike with a strong, powerful frame on which all the structural elements could be placed. You can choose any other one whose frame meets these requirements. One of the goals was to place the center of gravity as low as possible. Below you can see a list of the remaining main components we ordered for the manufacture of the motorized bicycle:
- Briggs and Stratton electric motor;
- Alltrax AX 300A electric motor controller;
- Magura throttle grip 0-5K Ohm;
- Sealed acid-lead batteries 4x12V, 21A/h;
- Disc brake Avid Bb7 160mm;
- Moped chain #35;
- 13-tooth drive sprocket;
- 66-tooth driven sprocket;
- Large size switch;
- Fuse 300A;
- Stainless steel motor support with a diameter of 21 cm (it will replace the bicycle carriage).

We removed the original rigid fork and replaced it with a Manitou suspension fork. We also secured the disc brake with bolts. We decided to go with mechanical disc brakes rather than hydraulic ones simply because they are simpler and cheaper. The Avid BB7 is fully adjustable. You can customize each of them individually.

Since the bike we bought used a foot brake (due to the movement of the pedals in reverse side), we needed to make mounts in the dropout area in order to install another disc brake. We used a hacksaw to cut a piece of steel into the desired shape. Then we used a drill press to drill holes for the brake mount.

The rear hub we used was designed as a double front hub. It had standard six-bolt mounts for mountain bikes. We took a 66 tooth driven sprocket with no mounting holes and drilled it to fit this six bolt mount. The exact placement of the disc brake hub, sprocket and rotor on the same axis is extremely important.

The brake mount is welded, the wheels are screwed to the hubs, and the top stay of the frame is bent on the right side so that the chain and 66-tooth sprocket do not catch it.

The engine mount (cut from the same sheet of steel as the brake mount) is welded to a stainless steel ring. The ring, in turn, is welded into place, exactly in the center, taking the place of the carriage that originally stood there. The footpeg mount is made from a couple of old light stands welded together.

Accurate centering of the motor ring is very important. In our case, the ring is a section of stainless steel lamp post, salvaged from a landfill and trimmed to 11cm wide. Its diameter is 21cm, and given the size of our engine, the gap between them is about 3mm. The ring is drilled on a drill press to allow air flow around the motor. There is a recess on the right side to ensure free movement of the chain. The motor mount is welded into the ring with an offset to ensure proper alignment of the motor shaft and the e-bike chain. At the bottom of the ring, fasteners were welded to make the footpegs and the frame for them removable. The footpegs themselves were made from aluminum BMX pegs.

The original saddle post was removed, shortened and welded to the frame stays above the rear wheel, with a reinforcement insert added for structural strength. The rubber cap was placed on the seat tube and the saddle clamp was deployed.

Here you can see a bicycle with a frame prepared for installing a motor and batteries. Powerful wheels and a low saddle position give it the appearance retro motorcycle. Pay attention to the holes on the top tube of the frame for the rear brake cable.

The battery trays were made of aluminum. They were riveted to each other and bolted to the left and right panels. The panels themselves were then bolted to both sides of the frame. Notice the power switch in the center. In order to be able to reach the switch contacts, the panels are made asymmetrical. The controller was installed under the top tube upside down with the contacts facing backwards.




After the assembly was completed, we started connecting the wires. After that, we tested the motorized bike in the parking lot for several hours. It accelerates really quickly and we haven't tested it maximum speed. According to a rough estimate, it should reach more than 80 km/h.
The controller we use can be connected to a computer via an RS-232 serial port. Using free software downloaded from the manufacturer's website (in this case www.alltraxinc.com), you can view real-time statistics, change settings and adjust the gas power curve.

In the video you can see how we first decided to test the capabilities of the motorized bicycle we made. It turned out to work well, quiet, well balanced and quite fast. At the end of the tests, we decided to call it EV-12. Once you assemble your electric bike, you can name it whatever you want. So don’t waste time - the workshop is waiting for you!

It’s worth saying right away that the market offers a ready-made kit consisting of an engine and the equipment necessary to install it on a bicycle. A ready-made solution for those who want a bicycle with a motor, but are not ready to make the necessary fasteners themselves and think about choosing the most suitable engine. It’s most likely not worth going into more detail into the characteristics of this product - everything is listed on the manufacturer’s website.

For those who believe that buying a ready-made solution is at least unsporting, at the first stage there is perhaps main question: Which engine is better to choose? Most often, gasoline engines from ordinary household lawn mowers (trimmers) are used to solve this problem. At the same time, do not forget that lawn mowers are equipped with engines of different power, which is important when installing it on a bicycle. For example, a 1 hp engine. It is unlikely that he will be able to move the bicycle from its place - he will need to help with the pedals. And when going uphill, you won’t be able to completely forget about the pedals. While the 2 hp engine is already able to climb hills and accelerate the bike without additional pedaling. Naturally, what more powerful engine- the heavier and larger it is.

The reader, of course, may be surprised: “How is this an engine from a saw or trimmer, but on a bicycle? It’s very noisy.” And he will be absolutely right: when driving with the engine running, there is no way to enjoy the singing of birds.

Of course, you can use different engine options. For example, an old Soviet D6, which can be found at a flea market, or some engine from Chinese scooters with built-in variator.

Drive

That’s basically all that can be said in general terms about making a bicycle with a motor. Other technical solutions depend on the type of selected engine, bicycle, drive type and others. design features. In general, when installing the engine, you will have to think a lot and do it yourself.

The approximate project budget consists of the following components:

• Engine: 3,000 - 30,000 rub.;
• Pulleys: 300 - 5,000 rub.;
• Drive belt and tensioner roller: 500 - 5000 rubles;
• Fastening elements: 100 - 5,000 rub.

Thus, as you can see, making a moped out of a bicycle is not such a cheap pleasure, and in some cases it is advisable to buy a ready-made motor for a bicycle or even a moped.

A bicycle with a motor combines many advantages. This is a new generation device, which is a very high-tech mode of transport today. All this allows us to achieve the fact that technology is able to provide its consumer with many different opportunities. If you want to become the owner of a hybrid bicycle, you need to be prepared for the fact that such a miracle costs much more than ordinary bicycles. Sometimes their price even exceeds 150,000 rubles.

Homemade bicycle with motor

Therefore, many today prefer to make homemade bicycle equipped with a motor. Of course, you will have to spend a lot of effort on this, but you will be able to save some money.

Advantages of a bicycle with a motor

A motorbike combines a lot of advantages. It is equipped with a motor that, when properly connected, can operate almost silently. In addition, the device runs on electricity (current can be created using a trimmer). This in turn ensures that nothing disrupts your journey along the road.

Due to the fact that the device runs on current, it is quite economical, because electricity costs much less than gasoline. Its price is almost 7 times less.

You can charge the device using a regular outlet. Moreover, if suddenly the charging is completely finished, this does not mean that you will have to continue walking. After this, the bicycle equipped with a motor turns into a regular bicycle. Movement on it is possible by pedaling.

Maneuverability and compactness

A motorbike has a huge advantage in city traffic jams. Thanks to its compact size and maneuverability, you can use it to get out of almost any traffic jam on the road.

Accelerates to fairly high speeds. Therefore, using such a bicycle equipped with a motor, you can get to your destination in a matter of minutes.

You can store it at home without any problems. The motor is easily removed, so the parts can even be stored separately.

Ease of maintenance

Maintenance of such equipment is simple and convenient, since you do not need to waste your time pouring gasoline, servicing filters, cleaning the trimmer, etc.

Spare parts are available for sale, so if one of the parts breaks, it can always be found and purchased.

However, there are also gasoline models that have their own advantages in some areas. You can buy them anywhere that sells motorcycles. But making such a device with your own hands is also quite possible.

We make the device ourselves

Not everyone can buy a motorbike, the price of which is very high. Therefore, many are interested in how to make this type of transport with their own hands. Naturally, in order to begin this process, you must have at least minimal knowledge in this area. In addition, first of all, you need to buy all the necessary parts that will be needed during the work process.

Option I: buy a wheel motor

Of course, you can buy a special wheel motor, which is already equipped with all the necessary parts. However, its price can hit your pocket hard, so there is another option, which we will look at a little later.

Along with the wheel, the kit includes a controller, gas handle, brake handle and charger, Pas system. A controller is required for conversion DC, coming from the battery, into the variable. The Pas system activates the engine while pedaling.

Brake levers help the device brake quickly and effectively.

Installation

When installing a wheel motor with your own hands, you should perform these steps in strict order. Turn the bike upside down and then remove it rear wheel, which was installed on the bike from the factory. When installing a new wheel, you need to make sure that the bundle with all the wires is on the left side of the bicycle. Otherwise, the wheel may spin in the opposite direction, which cannot guarantee the safety of the bicycle driver.

Once the wheel is completely installed, you will still need to install the batteries to the frame, as well as the controller. It is very important to provide additional insulation by wrapping it, for example, in a plastic bag.

Connect all other equipment. Prerequisite: connection to the battery must be made using a 20A fuse.

The bicycle with the motor is ready.

Option II: a bicycle with a chainsaw motor

This option is only possible if there is a broken chainsaw with a running motor. The fact is that you will have to spend a lot of money to buy a new chainsaw, since its price fluctuates around 20,000 rubles.

Any bicycle can be used, the main thing is that it is in good working order. A chainsaw with a 1.5 hp motor is quite suitable for a bicycle. The engine is mounted above the frame using a clamp, which can be purchased at any hardware store.

The bushing can be secured using special washers and screws.

To install the throttle lever, you need to install a special cable that will connect the motorbike lever to the engine from the chainsaw.

Using a regular trimmer can replace the controller, but a fuse is still necessary.

And in conclusion

This way, you will be able to get a great bike, the price of which will not hit your pocket. With this type of transport you can move anywhere: be it in a big metropolis or on rural roads. This is an indispensable transport for trips to the country house or apiary, great option, with which you can organize the long-awaited fishing trip. The low price is mainly due to the fact that all the installation of parts is carried out independently.

This bike is also very maneuverable. It will bring a lot of pleasure to fans, although there are some disadvantages. The fact is that from now on you will have to be wary of yard dogs, who absolutely cannot stand the sound made by a motorbike.

Models. But recently, devices with a gasoline power unit have become increasingly common. A gasoline engine for a bicycle is a very controversial device that can be used to upgrade a vehicle.

Unlike other devices, the motor influences the design so much that it practically transfers it to the class of mopeds. Is it worth making the bike self-propelled and what motor can be used for this?

Species

Previously, the only way to motorize was to install an engine from a chainsaw or lawn mower on the frame - today it is easy to find a gasoline motor for a bicycle in an assembly kit.

This kit includes all the necessary parts to assemble a bicycle with a gasoline engine: internal combustion engine, clutch, throttle valve, accelerator handle, chain, which can be used if necessary, gas tank, drive system and even a reinforced trunk for installation.

The production of such sets is carried out by domestic manufacturers and companies from Asia., in which motorbikes have become very popular.

The gasoline motor for a bicycle from a kit is much simpler than car engine- has only one cylinder of small volume (up to 50 cc) and low power (1–2 hp). However, like all internal combustion engines, these engines are divided into two types:

• two-stroke;
• four-stroke.

Two-stroke

The first group includes Comet engine line. Models have power from 1 to 2 liters. s., allow you to accelerate to 50 km/h. They are equipped with a suspension and a belt drive, which is also a range multiplier, due to which the engine torque increases.

Important! The belt does not deprive you of the ability to pedal independently if the fuel runs out or the engine of a bicycle, the price of which is quite high, breaks down.

Another representative of two-stroke engines is Chinese F50/F80, assembled by analogy with the Soviet “D-5”. It has less power - 1.5 liters. s., accelerates the bike to 30 km/h. Starts right up. It features low fuel consumption - 1 liter per 100 km.

Four-stroke

Four-stroke engines are kits from Japanese companies Honda And Yamaha. They have great power - up to 4 liters. With. A bike with such a motor is as close as possible to a moped - you can even start without using the pedals. The price of a gasoline engine for a bicycle of this type is much higher than that of a two-stroke, and it is more difficult to find - famous companies are actively switching to the production of electric motors, and internal combustion engines are gradually disappearing from sale.

Advantages and Disadvantages

It is impossible to say for sure whether installing a motor on a bicycle is the right decision. This unit has many significant disadvantages:

• complication of design. Even an ordinary bicycle requires constant maintenance, which many people do not have the time or desire to do. And you need to look after your motorbike even more carefully. In addition, the power unit and additional parts, unlike a car or motorcycle, are not protected in any way;
• increase in vehicle weight. It becomes more difficult to manage;
• increased risk of operation- both for the driver and for those around him. A bicycle with a power unit travels at a speed of 30–40 km/h, it is more difficult to stop, and if you get into an accident, you can get much more serious injuries than during normal riding;
• to ensure pedestrian safety you have to drive along highways , which can be downright scary;
• You must carry a supply of fuel and oil with you;
• bike loses noiselessness and environmental friendliness;
• the vehicle ceases to be a sports car and a healing projectile;
• for legal riding of a motorized bicycle you need a category "M" license.

However, there are enough advantages:

• you can travel a greater distance in less time, which is important for cyclists;
• The motor can only be used for climbing uphill. or when tired, if physical fitness is not enough;
• high operating efficiency at high speed movement. Riding a motorbike is cheaper than any other transport;
• If the engine fails, you won’t have to drive the bike hand-in-hand, like a moped - you can get home using the traditional pedal method;
• Although the health benefits disappear over short distances, the opposite is true for regular long-distance trips - reduces the risk of damaging your knees, which many active cyclists face.

Motor installation

There are two main ways to make a bicycle with a gasoline engine with your own hands:

It is not uncommon to find mounted gasoline engines for bicycles. If desired, it can be placed on the fork at the steering wheel, making the bike front-wheel drive, or even provide four-wheel drive two motors. In this case, you will need to install a double shock absorber, as on.

Important! Regardless of installation method power unit It is necessary to protect the bicycle from vibrations using suspension.

Price

Today, in almost any bike shop you can find bicycles with gasoline engines. The price of such models depends on the type of engine, its power, volume and other characteristics.