Even with minimal tuning of the scooter, you need to think about the installation resonant exhaust. The principle of operation and an overview of saxophones, as such silencers are called in the people, we will give in another article.
Resonant silencer Saxophone - The thing is not cheap and not everyone on the pocket. Accordingly, the scotterists have a desire to save and make such an exhaust pipe own forces. In this article, you will learn how to make a primitive homemade saxophone on the example of a scooter Yamaha Jog.. Why primitive? Because with this method we will not lead calculations of the resonator (This requires a special program), and simply use the silencer drawing of the saxophone.
Saxophone drawing on scooter
In the drawing are given silencer silent saxophone on yamah jog.
How to make a silencer yamaha jog saxophone
So, proceed. For production of saxophone We will need metal, a thickness of approximately 1.2 mm. It must be blocked according to the dimensions specified in the drawing (you can customize these sizes closer to your parameters). To accurate metal, we drag the wooden blank in size (such a wooden silencer turned out) and already in this form, Gnome Steel. After carefully fitting the workpiece, weld the joints with semi-automatic welding. We clean the item with any available ways.
Also wound up the muffler and the muffler pipe. On the one hand, you will be brewing completely, and on the other hand on the rivets (for replacing the filler, there is glass gamble). After welding work All items check for tightness - the passes should not be, of course.
We grind all the details and paints. IN this case mufler Painted powder paint, and everything else is simple acrylic paint.
Muffler mounts are made of stainless steel.
And here is the result of our painstaking robots - a copy tecnigas saxophone. Not bad, right?
Look even better saxophone on scooter.
After installing such a silencer, you may need adjustment of the scooter carburetor, setting the transmission as a whole and generally the engine.
Hello everyone!
A small topic on the construction of the silencer "directly". For example, it was based on the moped, but it's no different from the car. It is not possible to give everything in the "knee" in the shed, you just need to order a familiar drunk turque to the details and find a piece of stainless steel. Balango I have a native factory at hand, where I have round-the-clock access to metals various brands and machines. In the beginning, I extire what the bank will be in size. The Diameter is multiplied by 3.14 and we obtain the length of the circle in the deployment of the form. My like is 96mm and the height of the jar of 400mm. Rust is better to take in the film, for which you will see . A smooth pipe and weld with point welding.
Further turning (I sharpened myself) we drew 2 washers for the desired diameter.
And for what the film on the pipe? For the inscriptions of course!) For myself, I chched the Poultry Ponte inscription Zide Sport.
If there are no films, you can stick a wide isolent. You first print on the printer, then we glue to the pipe and cut the scalple or special. A knife. When you carefully removes the elements and voila we needed, the stencil is ready. Krasim. 
Rejoice in the resulting inscription 
Next, you need to make a grid or grid with cells with a finger pipe of the desired diameter inside the muffler. 
All this insert so that the holes coincided with this pipe, stitching tightly wool type URSA or Knauf on the edges (these are building insulation) wool so withstands a large enough temperature and does not fly out of the pipe due to the grid inside. CEREDUNY remains completely free and if on shining there with a flashlight we will see the nozzle even)
That's all. This was all done for free. 
It is difficult to imagine a sports or tuning city car without a direct-flow muffler. The noble rocus of the motor is pleased with the dear hearing of the owner, leads to the thrill of girls, causes envy and admiration for buddies. However, it does not always like the neighbors, and the traffic police prefers a quiet forward flow. This is where the question arises in front of the driver: what to do to muffle it, what methods are used in order for the exhaust to become quieter.
Why do you need a direct flow and why sometimes it needs to muffle
The machine with exhaust louder 96 dB will not be able to pass technical inspection and will not cross the border - in Europe the rules road Hard, and police officers. Even in motor racing, the sound is limited. I do not like the attempt to drown out noise from cars only promoters of Formula 1. They even opposed the new transition regulations with eight-cylinder engines on the V6, fearing for the prestige of the racing.
Having decided to muffle the direct flow, with your own hands, you need to clearly imagine the principles of the work of the agreed release, and determine the purpose of the car tuning. Improving dynamic characteristics occurs only due to the installation of the new "spider" - the exhaust manifold. The remaining components of the exhaust system simply should not create resistance to gases and affect the result.
For proper settingThe resonant exhaust gives an increase in torque by 3-9% at atmospheric, and more than 10% - in turbocharged motors. BUT B. serial cars Increasing the filling indicator of the cylinders of the working mixture during modernization is less than 2-3%.
Installing the direct-flow silencer on ordinary stock machines, is needed only as a decorative option, for a pleasant wiping timber. The main criterion for the quality of the work of the direct-flow on the mass machine is the fraud and velvety noise of the motor, and not an increase in power. Louder or quieter will yell a car - on high-speed and dynamic characteristics it will not affect. In this case, when an urgent need arises to drown out forward flows, you can do this without thinking about the consequences.
What is a flute in the directing silencer, and what effect on it
To make direct flows quieter and get "passing" decibels at the exit, a simple design is used, which in motorists is called flute. It is a piece of perforated tube with a length of 180-250 mm and a diameter of a little more than 1/3 exhaust, with a welded washer-stub in the form of a disk, cylinder or cone, which is fastened on the bolts inside the forward-point, in the air slice, thereby allowing you to muffle it. 
The principle of the flute of the flute for the forward-point is that when changing the cross section of the exhaust channel, and the outlet of the exhaust gases through perforations, occurs:
- changing speed and pressure;
- sound wave is broken;
- volume is reduced by 3-4 dB, the exhaust becomes quieter.
The correct name of this flute is Silenser (from the English. Silencer - silencer), and it is included in the kit expensive systems Exhaust sold on the Internet. Can be purchased separately, average price Good European models 70-150 dollars, and mass of the subnet - from 450 rubles.
Flute for forward-point with your own hands
If there is a desire and skill, make the flute with your own hands, in order to drown out the forward flow, is completely simple. It turns out cheaper than brand name, but not always better than Chinese. 
It will require steel (better stainless) pipe 20 mm and a piece of sheet metal with a thickness of 0.8-1.2 mm. Cooking desirable arc welding, observing the rules for working with stainless steel. A pre-bent plug with holes for fastening is welded to the pipe. You can faster on three M8 bolts, but for installation in a few minutes, and one threaded connection is enough.
In the manufacture, it is necessary to try to gently measure the inner diameter of the muffler at the air cut, so that the plug came into poorly, but without clearance. Then, when traveling to the track you can quickly remove the flute with a hot tube with a pair of wrench or passages. 
It is important to remember that any obstacle in exhaust pipe, Including the Silenser, inevitably reduces the engine power. Make quieter and muffled without lossless will not work.
To make quiet river silencerBut not to lose the added power, which the exhaust tract is upgraded, use direct flow with the damper. This exhaust design is known for a long time and occurs in many BMW models (more often than mechanical transmission).
When the engine is running on reduced, when the advantage of the agreed output is not used, the exhaust gases go through a conventional silencer, and the direct-flow closed with a flap. On optimal turns, the flap opens the output in the forward flow, and the motor gives the maximum torque due to the reinforced ventilation of the cylinders.
Control of the damper automatic, but exist and manual models. In the city, such a car is almost no different car from the stock, and on the track not only sounds like tuning, but has a real increase in power. It costs it is not cheap - for a full automaton, complete with the titanium "spider", the price often turns over a couple of thousand dollars.
Similar to opportunities, but not very famous analogs are moderately, but select suitable option Better with a specialist - to succeed such an upgrade, you may need to know engineer-Motorist. 
The budget version of the forward-point with the damper can also be welded independently from the girlfriend. For the damper, the upper part of the old carburetor is suitable, if you bring the cable idle move In the salon. It takes much more for the manufacture of such a design with your own hands, forces and time than for a homemade flute, and the result of the installation can not be predicted in advance. Lost the sound is easy, but to save power, even if you're lucky, you have to tinker with the setting.
Output
Whatever the emissions of the exhaust you do not elected, it should be understood that you can just buy ready decisionIf finances allow, but you can drown out with your own hands, making a device from the girlfriend.
Hello.
After a few loud screams "Curvaaaa !!!" With the intimidation of the motorcycle in the tree branches, the muffler on the poor TM EN 300 ... Reversed 🙂 I had to do a new one.
I would never have mastered such work. With the exception of small manipulations, such as burning flutes and travels for materials, the new bank of the muffler was completely manufactured by Oleg, for which he was still thank you for a lot!
The muffler is one of the most common versions of tuning motorcycles. Lategorized question: Why, in addition to banal saving money, steaming with the manufacture of copies of the Welshhouse, when you can order a tune, at the same time a little inflating the release. The fact is that the tuning of the release on two-stroke motorcycles should be started primarily from the resonator. And then already to the resonator who are selected for the desired operating range of turns, pick up the jar of the muffler. Or not to pick up, because on the two-strokes, it does not have such an influence, as for 4t. Therefore, the order of the silencer's tune banks without tuning the resonator does not make sense, but to order stock - doubly meaningless. There is another factor in order not to order FMF, yoshka and similar products: in a two-way three hundred and so much Duri, that to increase it additionally, for example, it will not be necessary for many more years. 🙂
The original silencer on TM EN 300 is made of foil, it turns out perfectly, bent after the next fall, it starts to cling the wheel when landing with jumps when the suspension is compressed - and rubs off to holes!
Therefore, a little sacrificing savings on weight, I had to make a new silencer from aluminum pipe with a thickness of 3 mm.
The pipe, however, found a diameter of only 100 mm., While to save the original proportions, the pipe diameter was supposed to be 90 mm.
In parallel, I burned the flute. As it turned out, it doesn't even need a burner for this, a construction hairdryer is 400 degrees.
In addition to saving the weight of the motorcycle, no manufacturer will install silencers with a wall of 3 mm on their motorcycles., Or at least with the mounting brackets to the subframe in 3 mm., Since then this bank will never break in life, and the materials will increase. .
Neat scaly weld will turn down to the ground, and will not rush into the eyes. It was a queue to make a plug, from an aluminum sheet of 3 mm. Then the tube will be welded into it, which will be from the inside to core and fasten the flute.
The seduction to tuning his motorcycle is probably before each biker. Who changes the appearance, who is something shamans with the engine, someone else came up with something new. You can improve on the bike almost everything, the main thing is that fantasies and opportunities have enough. Often they love to change or redo exhaust: I want more power. The sound is pogromed, etc. That's just in this post and will be discussed precisely about the tuning exhaust.
Replace in the sportsBike a regular silencer on tuning seductive: to extra horsepower Get "Right" sound. Who does not like with the "roar" to draw along the streets so that everyone pays attention to. Moreover, the traffic police do not take their eyes. Try to catch up)))))))
A little about the design and silencer
On modern four-stroke motorcycles, two types of silencers are used - sound-absorbing ( but) and resonator ( b.). There is a combination system, but about their widespread dissemination is little that can be said!
Standard motorcycle silencers - resonator type. The design of such a "pipe" resembles a labyrinth. If it is cut, a series of compartments connected inside, the so-called "flutes" will be found inside. The size of the "flutes" is that the spent gases can freely leave the camera, and the sound wave will pass only partially. This process is repeated in each compartment, and only the characteristic "whisper" remains at the outlet of the sound wave - a weak shadow of a wild screens that fell into the muffler from the engine.
Of course, such a system is complex and leads to loss of power due to many obstacles that have to overcome the spent gases. But she has its advantages. Each time the gas strikes the wall of the compartment, the secondary wave is formed - reflected, it moves in the opposite direction. The careful calculation of the configuration of the labyrinth allows you to combine this process with the moment of closing exhaust valve, And then the secondary wave "shakes" not a burnt mixture back into the combustion chamber. This effect is used to increase power on medium turnover. However, due to the complexity of the design, resonator silencers are quite expensive - their value ranges around 600-800 dollars apiece. Therefore, most non-original silencers are sound absorbing type.
Titanium silencers
4. Speaking every kilogram "Apeci-Racers", for sure, will choose a coalpastic (carboxyance) silencer, which, in addition to common for tuning "pipes" of the advantages, much easier than the original. However, these toys sweat the wallet significantly.
Well, full graduation systems that incarnate all possible advantages Tuning, intended really advanced superbikers or citizens at all have no financial problems. The cost of such "pins" is quite large for a simple biker. And definitely not in national currency.
And finally, the advice: Do not try to tuning the release, leaving the native silencer. The sound will become, really loud, but it will not be singing, but op. He does not keep any comparison with a real tuning voice. If you certainly do not "Kulibin". ......
