Homemade muffler to increase moped power

Our qualified car service center “Leha Exhaust” provides full service of exhaust systems of motorcycles such as: Harley Davidson, Suzuki, Yamaha, Honda, Kawasaki, KTM, Husqvarna

Manufacturing of exhaust systems for motorcycles in Moscow

We will manufacture and install a custom exhaust on a motorcycle

Motorcycle exhaust system tuning. Photos before work began

Photo after tuning. Muffler - our client's choice

Stainless steel motorcycle exhaust system

We will make an exhaust for a motorcycle in Moscow at a low price

Tuning the exhaust system of a motorcycle in Moscow - car service "Leha Exhaust". Come!

You can see even more photos of exhaust systems in our gallery

Page navigation:

Motorcycle exhaust services

Motorcycle exhaust problems

Motorcycle exhaust system tuning

Two stroke and four stroke scooter

A scooter, as you know, can be with a two-stroke or a four-stroke engine. The operating principle of the entire exhaust system differs radically among analogues.

The muffler on a four-stroke scooter removes gases in a relatively shorter time, doing this with minimal noise. In addition, tuning the muffler in this case will be quite simple. On the other hand, in both cases, when carrying out tuning, it will be necessary to change the pipes.

Types of mufflers for scooters

For the muffler of a two-stroke scooter, selecting components that make it possible to carry out tuning will be much more difficult. The standard muffler itself for such scooters is more difficult to manufacture and configure.

The exhaust system of a two-stroke scooter works as follows. During the process of cleaning exhaust gases, part of the power is returned to the engine. This happens at certain speeds and if you manage to implement this whole process by tuning, the scooter will be unrecognizable.

You can install a high-quality and correctly tuned resonator on a two-stroke scooter. This will give a noticeable increase in dynamics up to a quarter. But in this case, it will be important to carry out professional settings of the entire power system.

Services

We provide the widest range of services in Moscow for motorcycle exhaust systems

1. Manufacturing and selection of exhaust manifolds
2. Exhaust Sound Adjustment
3. Direct flow installation
4. Replacing or removing the catalyst
5. Muffler replacement, cleaning and repair
6. Manufacturing of exhaust systems according to individual projects

Most often, our customers turn to us to replace stock elements with high-quality Akrapovic exhaust system components, of which we are the official distributor.

Why do you need quality mufflers?

As you know, a certain amount of fuel combustion products accumulates in the cylinders of a moped engine. They must be thrown out and in this case it is the muffler that is responsible for this. In other words, this unit seems to smooth out the pulsations that are inevitable when combustion products are released at high speed.

The very design of the muffler, used not only on scooters and mopeds, but also on motorcycles and cars, implies a special exhaust system, which can be different, depending on what result the vehicle owner wants to achieve. For example, if the desire to improve the gas exhaust system is related to increasing the power of the scooter, a special type of muffler is required - a direct-flow muffler.

Direct flow type muffler

Direct-flow muffler device for moped

Installing this type of muffler will not only increase dynamic power, but will also significantly increase the noise emitted when gases escape. On the one hand, this is good, because this way you can attract the attention of other drivers, thereby increasing passive safety. As you know, drivers of large cars often complain that they do not notice motorcyclists, and mopeds and scooters even more so.

Making such a muffler from scratch or using a method that involves tuning is not difficult, but many technical aspects need to be studied.

Features of a direct-flow muffler

The features of direct flow are as follows: exhaust gases are ejected outside the engine immediately, the cylinders of the power unit have time to fill with the fuel mixture in the optimal amount.

I would like to remind all readers that at the moments of intake and exhaust, engine valves tend to open and close. Between these stages, a vacuum occurs, which allows the cylinders to be cleared of exhaust gases. As a result, free space is freed up, where the fuel mixture is supplied. It is easy to guess that the faster the cylinders are released from exhaustion, the faster they will be filled.

Thus, if you can ensure a faster exit of gases from the system, the performance and, as a result, the power of the scooter or moped will increase.

MY MOTORCYCLE

Probably every biker faces the temptation to tune his motorcycle. Someone changes the appearance, someone does something with the engine, someone else came up with something new. You can improve almost everything on a bike, the main thing is that you have enough imagination and possibilities. They often like to change or modify exhausts: they want more power. louder sound, etc. It is in this post that we will talk specifically about exhaust tuning.

It’s tempting to replace the standard muffler on a sportbike with a tuning one: in addition to the additional horsepower, you’ll get the “correct” sound. Who doesn’t like to roar through the streets so that everyone pays attention? Moreover, the traffic police pays little attention to this. Try to catch up)))))))

A little about the design and operation of the muffler

On modern four-stroke motorcycles, two types of mufflers are used - sound-absorbing ( a ) and resonator ( b ). There is also a combined system, but little can be said about their widespread use! Standard motorcycle mufflers are of the resonator type. The design of such a “Pipe” resembles a labyrinth. If you cut it open, you will find a series of compartments inside, connected by tubes - the so-called “flutes”. The size of the “flute” is such that the exhaust gases can easily leave the chamber, and the sound wave will only partially pass through. This process is repeated in each compartment, and at the output of the sound wave there remains only a characteristic “whispering” - a faint shadow of the wild roar that entered the muffler from the engine. Of course, such a system is complex and leads to loss of power due to the many obstacles that the exhaust gases have to overcome. But it has its advantages. Each time the gas hits the wall of the compartment, a secondary wave is formed - reflected, it moves in the opposite direction. Careful calculation of the labyrinth configuration makes it possible to combine this process with the moment of closing the exhaust valve, and then the secondary wave will “push” the unburnt mixture back into the combustion chamber. This effect is used to increase mid-range power. However, due to the complexity of the design, resonator mufflers are very expensive - their cost ranges from 600 to 800 dollars apiece. Therefore, most aftermarket mufflers are the sound-absorbing type.

Sound-absorbing pipe - combines relative cheapness and undoubted efficiency.
Its design is as simple as an Alpine horn: one large “flute” with many holes passes through the muffler body. The space between it and the body is filled with muffling padding resembling fiberglass. Entering the muffler, the gases are carried away in a straight line, and the sound wave, expanding, is partially absorbed by the packing. Its volume changes slightly. Therefore, despite its name, a sound-absorbing muffler is a sure-fire way to tune the “voice” of both a solid chopper and a souped-up sportbike. A booming roar or a characteristic racing howl obtained after installing such a “pipe” will notify you of your approach a couple of kilometers away. In addition, breathing deeply, the motorcycle gains several additional “horses”, albeit in a narrow rev range. Unlike standard ones, sound-absorbing mufflers require maintenance. This is expressed in regular replacement of the packing, since after several million sonic booms it thickens and loses its properties. Although to some this may seem like another advantage - the motorcycle begins to “scream” even more colorfully. And the indisputable disadvantage of such a “pipe” is the lack of a controlled secondary wave due to the lack of internal partitions. As a result, there may be a loss of power "in the middle of the tachometer". In both “pipes” another type of sound wave operates - low pressure. It occurs when sound reaches the muffler outlet and then travels to the engine. If it comes to the exhaust valve at the moment it opens, a reduced pressure is created at the outlet, and the contents of the combustion chamber fly out with even more enthusiasm.

What can be done?

Replacing just the "pipe" basically improves the sound and appearance of the bike. The power increases slightly - by two percent. If you want a noticeable increase, change the pipes as well, then your engine herd will grow by five to seven percent. If the manufacturers of some “super-duper” release promise more, be careful: no one has ever managed to cross this line. What does replacing pipes give?

The fact is that both standard and tuning pants use the same effect. The engine cylinders operate unevenly relative to each other, the exhaust from each moves to the muffler as if alone, creating a low-pressure zone behind it. By carefully selecting the pipes, you can calculate their length so that portions of gases from different cylinders will follow one after another like the teeth of a “zipper” on your overalls, falling exactly into these very zones. As a result, the speed of the exhaust gases increases, the combustion chamber is cleaned faster, and engine power increases. However, the standard pipes are designed so that the engine provides both stable traction at medium speeds and “pickup” at high speeds. The creators of tuning “pants” are concerned only with peak power and without regret sacrifice the width of the range in which the engine “pulls”. By changing the configuration of the pipes, they achieve maximum output from the engine within 200-300 rpm, which is ideal for advanced racers who are able to keep the tachometer needle at exactly 8 at this point. Ordinary mortals are unlikely to be able to estimate an increase of five horses “somewhere in the region of 8200.” Tuning pants not only increase power. Convenience is another advantage. Unlike standard ones, they are collapsible, on springs. If you replace the pipes, you don’t have to replace them entirely - just remove the damaged section and install a new one.

Which muffler should you choose?

It all depends on why you need it!?

1. If for “rumble” on the streets, the option is a sound-absorbing muffler made of stainless steel or aluminum. It looks smart, screams loudly and the engine “breathes”. And it costs less than others.
2. For those who want to really improve the performance characteristics of their pet, there are two other types of mufflers.
3. For those who practice active driving, there are titanium “pipes”, the main advantage of which is durability. By installing them, you will significantly reduce the risk of damaging your mufflers when meeting asphalt.

Titanium mufflers

4. “Speed ​​racers” who count every kilogram will probably choose a carbon fiber muffler, which, in addition to the advantages common to tuning “pipes,” is much lighter than the original one. However, these toys significantly empty your wallet.

Well, complete exhaust systems, which embody all the possible advantages of tuning, are intended for truly advanced superbikers or citizens who do not have financial problems at all. The cost of such “things” is quite high for a simple biker. And definitely not in national currency.

And finally, advice: do not try to tune the exhaust by gutting the original muffler. The sound will indeed become loud, but it will not be singing, but shouting. It can't be compared to a real tuning voice. Unless of course you are “Kulibin”. ……

Cleaning the muffler

The cleanliness of the muffler affects the power of the moped

Before you start changing anything in the exhaust system, I would like to give one piece of advice. The power of the scooter is directly affected by the cleanliness of the muffler. If it were possible to see the exhaust in a cross-section of the muffler, the owner of the scooter would be very surprised. After a certain mileage, the scooter's dynamics decrease, and owners begin to look for the reasons for this, finding them in a complete rework of the standard muffler or its replacement.

The reason for the loss of power, meanwhile, may be hidden in the condition of the engine itself. This will help determine the specialist you should contact before tuning. But the most common cause of loss of dynamics is soot that clogs the muffler. In this case, it is recommended to carry out cleaning in three ways.

First method: mechanical

It involves cleaning the muffler section (it is done with a grinder). The inside of the muffler is cleaned of soot using a wire or cable. The section in the section is closed by welding.

Second method: chemical

It involves pouring water with some kind of cleaner into the muffler. For example, caustic soda is suitable for this purpose. This cleaning has the advantage that the appearance of the muffler will not be affected in any way.

Third method: heat treatment

The muffler is heated either on the scooter with a blowtorch, or dismantled in an oven or on a grill. It will be necessary to repaint the muffler only after it has cooled.

How to make a forward flow on a motorcycle with your own hands

By increasing the power of their apparatus, motorcycle owners are faced with the problem of gas exhaust, and then the question arises of how to make a direct flow to the motorcycle. What is forward flow? Trying to push their engine to its limits, fans of fast driving are chasing even the smallest improvements in tank performance. Having achieved the maximum effect from all resources, the turn moves to the exhaust pipe.

Direct flow serves as a system of unidirectional movement of liquids or gases. In the factory version of the motorcycle, a standard exhaust pipe is enough, and after increasing the power, the exhaust of gases is difficult due to their increased amount of exhaust gases. Exhaust system professionals can add about 3-5 horsepower to a motorcycle . This is a very good indicator. In addition, they pay special attention to the sound produced by the muffler.

If your budget does not allow you to turn to specialists, there is an easy way to make a forward flow on a motorcycle with your own hands. This procedure is quite simple and not expensive. There is no need to purchase materials. You can find them in your garage.

Muffler conversion

As a rule, many craftsmen not only assemble a muffler, but remake a standard one. This makes it possible to spend less time and get a more acceptable option.

Tools and materials

Before you start tuning, you need to prepare the necessary tools. In this case, the following components will be needed:

1. Welding machine, preferably with different operating modes;
2. Pipe of appropriate size and diameter;
3. Bulgarian;
4. Several metal brushes for washing dishes.

Let's start tuning

First we dismantle the muffler. Then we take a grinder and cut out a piece of metal on top of the muffler. With this cut it will be much easier to work with the muffler. You should almost completely cut out the top part. After this, it is necessary to clean the entire internal space of the muffler, dismantling the cut-away elements.

It's time to work with the piece of pipe that we have prepared. Using a powerful drill or welding, we make many holes in the pipe. We place the pipe in the section of the standard muffler. We select in advance a pipe of such a diameter that it fits inside the standard one. It is desirable that the pipe be without any obvious flaws and perfectly straight.

Straight-through muffler in the process of assembly

The space in the cut that remains between the two pipes must be filled with metal pipe cleaners or similar materials. We weld the top of the pipe as it was. We reinstall all structural elements that were dismantled during the process.

As a result of the tuning, we will get a forward flow muffler that provides the desired result. The massive and rich roar of the engine, as well as the increase in power of the moped, will be evidence that everything was successful.

Making a direct-flow muffler from scratch

You can make such a muffler from scratch. This will be a completely new version made from several components. The difficulty of this operation, called tuning from scratch, lies in finding the diagram of the exhaust system of a particular moped.

Tools and materials

In this case, again, you need to prepare the necessary tools and materials.

1. Purchase in a store or find two pipes with a diameter of 33 mm;
2. Buy plexiglass;
3. Bolts M8 and M3;
4. Prepare glue and nails;
5. Welding machine;
6. Needles;
7. Hacksaw for metal.

Let's start assembling

First of all, you need to cut 18 cm from one of the pipes. It is recommended to carefully process the place in the cut with a needle file. From the second pipe we cut a circle with a diameter of 1.5 cm. We process it using the method described above. Glue the cut out circle in the section of the first pipe. We cut off another piece of pipe, 18 cm long. We make many holes in it. This can also be done with a sharp nail.

We connect all the parts using a welding machine. We fill the cavity formed at the junction of two pieces of pipe with mineral wool. We wrap the finished product with a special fire-resistant material. The homemade muffler is ready. To install it, you will need to attach the element to the scooter body mount.

Making a muffler mounting element

From plexiglass, which is indispensable in this matter due to its strength and easy paintability, we cut out a special type of ring, the edges of which can be bent outward by 180 degrees. We attach the resulting circles with serifs to the moped using the required bolts. We polish the muffler using sandpaper. To be sure, the joints between the homemade product and the moped body will need to be lubricated.

Homemade muffler for moped disassembled

If homemade production causes certain difficulties, you can find a lot of models of mufflers already in finished form. They are usually inexpensive. On the other hand, only a homemade version can provide the ideally expected option.