Setting up a Suzuki Lets 2 carburetor

The carburetor is an important part, without which the engine will not work. How to set up the carburetor on a scooter determines how smoothly and correctly the engine will run and whether it will be possible to start it in cold weather. The task of this unit is to mix gasoline with air in certain proportions, resulting in the formation of a working mixture, the composition of which determines the behavior of the power unit. The standard ratio should be 1 to 15, if you need the scooter to idle well, you can lean the mixture a little by making 1 to 13; enriched mixture - 1 to 17. For a more in-depth study of the design of a scooter carburetor, we recommend reading the article “The design of a scooter carburetor and the principle of its operation.” Well, now let's learn everything about adjusting the 2-stroke and 4-stroke carburetor of a scooter.

Adjusting the Suzuki Sepia carburetor

Before the procedure, you should remember that when changing parts such as a cylinder, filters, muffler, the old carburetor settings will be invalid and you will have to make adjustments again. It is also extremely important to adjust the jets when the engine is already warm. The process is carried out as follows:

Adjustment of needle and venturi tube size at 1/3 gas;
Adjusting idle speed and mixture quality.

The Japanese scooter Suzuki Sepia is considered a fairly popular model in Russia and other countries, in particular due to its attractive appearance and simple design of the engine and other parts. But problems with this scooter are quite common and are caused by malfunctions of such components as the CPG, carburetor and variator. It is important to carefully monitor their condition to prevent damage. As for the carburetor, the Mikuni carburetor is used here; the Suzuki Sepia is ideal for this carburetor model, which is also used on other equipment. In particular, you can see a similar model on the no less famous Suzuki Adress scooter. The carburetor is characterized by its simple design, good quality and the ability to quickly adjust. But judging by the frequent problems of owners, it will be extremely difficult to adjust the carburetor for optimal operation of the scooter; the entire procedure will have to be carried out exactly according to the specified rules. If you are the owner of a Suzuki Sepia, get ready to clean the carburetor frequently, because its location is so inconvenient that the carburetor becomes clogged with dust very often. Below is a carburetor setting option.

Review of the Suzuki Lets 2 scooter, characteristics and photos

Suzuki has always produced high-quality equipment, which has become one of the best on the market. And when the excellent Suzuki Lets scooter came out, the manufacturer saw great potential.

Then it was the Lets model that opened the company’s range of scooters, which gave it unprecedented popularity. The scooters were durable, stylish and great for young people. With proper characteristics, the model could reach speeds of up to 60 km/h, which is the norm for this type today. Like all vehicles, the Suzuki Lets 2 has several drawbacks.

pros

very low fuel consumption;
comfortable fit and seat position;
modern and practical appearance;
a true example of Japanese scooters.

Minuses

weak headlight light;
cannot tolerate snowy weather.

Technical characteristics of Suzuki Lets 2

Today's Suzuki Lets 2 are of quite high quality, because throughout its long existence the moped has received a number of improvements and modifications. The Lets model acquired a fairly simple air-cooled engine operating in 2 strokes. It was the two-stroke modifications that were much better than the 4-stroke ones, because they had a simpler design and worked faster than their competitor.

The Suzuki Lets 2 moped had one important drawback of the engine - a high noise level. But despite this, he enjoyed wild popularity. With a thrust of 7.3 Nm, the driver could make sharp starts or easily carry one passenger.

Review of Suzuki Lets 2

The world first learned about Suzuki Lets 2 back in 1996. At that time, the Japanese had already made a high-quality scooter, the design of which was soon adopted by other manufacturers. But the company did not finish there, and then in 1999 a new modification, Suzuki Lets 2 New, was released. Its main difference was new forms, a streamlined design and excellent lighting technology.

Like any other Japanese scooter, the new product has high-quality and durable plastic with smooth lines. In general, the entire design of the moped is very well thought out, because any necessary part can be easily reached. The manufacturer also took care of transportation, so a small basket was installed in front and a large luggage compartment under the seat. A helmet can easily fit there.

The company has always made clear and informative technology, which is why the dashboard has fuel indicators, an odometer, and even a “check engine” indicator. Tuning Suzuki Lets 2 is quite simple, because the design and construction of the model itself allow for a minimum of modifications. For the most part, this is a plus, because the Suzuki Lets 2 is quite simple and practical; major external tuning will only be a disadvantage for it. To improve the technical characteristics, you can install a different variator belt and play with the weight of the weights on the scooter. If you choose the optimal weight, your vehicle can accelerate to 75 km/h.

Repairing Suzuki Lets 2 is also simple and affordable, because spare parts for it are almost the most popular on the motorcycle market today. You can choose from Chinese, Taiwanese or original Japanese parts. It is strongly recommended not to buy Chinese spare parts, as they will primarily harm your scooter. The best option would be to purchase Taiwanese spare parts.

Review of Suzuki Lets 2

I bought the scooter secondhand. y, but the owner assured of its quality and reliability. That’s how it turned out, despite the mileage of 2,000 km, I got a very fast machine. I tested it a little for maximum speed, and in the very first test, the Suzuki Lets gave a maximum speed of 55 km.

I also tested it for load capacity, and I’ll tell you straight, for its size the scooter is a real beast. Once I was riding with my wife and a whole sack of potatoes, but the iron horse showed itself perfectly. In my situation, the average fuel consumption was 2.5 liters/100 km. The only thing I didn’t like was that the light from the front headlight was too weak, it was hard to see the road at night.

Video Suzuki Lets 2

Needle adjustment

The peculiarity of this carburetor is the absence of a jet for the quality of the mixture; its adjustment here occurs by raising or lowering the locking ring on the needle. If you notice that the mixture is too lean, you will have to install the ring higher by 1 or 2 grooves; accordingly, the mixture will be rich when installing the same ring on the 4th or 5th step. The center position on the 3rd groove indicates the standard throttle needle setting. If configured correctly, the scooter will have good traction, speed and consume fuel according to the specified characteristics.

Why do you need to regulate?

During the adjustment process, the scooter carburetor needle is adjusted, the position of which affects the proportions of the air-fuel mixture, as well as a number of other adjustments.

Adjusting the scooter carburetor needle is done during the adjustment process

Each tuning operation has a different effect on engine operation and fuel preparation:

adjusting the idle speed ensures stable operation of a running engine when the transmission is turned off;
changing the quality of the air-gasoline mixture using a special screw allows you to deplete or enrich it;
adjusting the position of the carburetor needle affects the change in the quality of the fuel mixture;
Ensuring a stable level of gasoline inside the float chamber avoids flooding of spark plugs.

Features of setting up the carburetor of a 2-stroke scooter

The carburetor on the 2t scooter is slightly different in design and does not fit the 4t motor. The question of how to set up such a device worries all owners of two-stroke machines.

Most Chinese models have a fairly simple carburetor without unnecessary adjustments. The enrichment here is mechanical, although if you are tuning a scooter or you have a Japanese model, the enrichment can also be electric. In order to use the mechanical option, you must first pull the trigger on it, and then try to start the equipment.

Adjusting the carburetor of a 2T scooter is not difficult, but it does require some patience. In order to do this, you will need to disassemble the carburetor: first you will need to unscrew the top cover. The needle in it is fixed with a staple; it needs to be pulled out. The quality of the mixture is adjusted in the same way as described above. A feature of the push-pull system is that the needle affects the quality of the mixture only in a certain position. If the throttle valve is raised to its maximum, only the main fuel jet will be responsible for the fuel mixture. Sometimes the idle speed system interferes with it. Depending on what carburetor you have installed.

For a cold start, you need to use a starting enrichment, which must be closed after the engine warms up; Simply put, it's a suction. In such carburetors, the fuel level plays an important role. It is also regulated by mechanical intervention in the operation of the float chamber. It is configured in the same way as in the four-stroke version. In fact, the carburetor for 2t engines differs from models for engines on a 4-stroke scooter only in jets and some other parameters, but it is designed similarly, and therefore is regulated in the same way.

Setting the air screw

The carburetor also has a jet responsible for the amount of air located under the cover. The jet is located in the air channel, so when you tighten the screw, the throttle rises and the air flow increases. At the same time, the engine speed increases.

Configuration is carried out as follows:

completely tighten the screw and unscrew it 4-5 turns;
the engine should start to stall;
gradually tighten the screw until the speed increases to maximum;
upon reaching maximum speed, you can unscrew the screw ¼ turn;
adjust the idle speed screw for optimal speed.

How to set up and adjust the carburetor on a scooter

Having bought a motorcycle, scooter or other motorized equipment, owners have to become familiar with the operation and adjustment of their main components. One of the important elements of a two-stroke or four-stroke power unit is the carburetor, which is responsible for supplying fuel to the combustion chamber and mixing gasoline with air in the required ratio. Many people do not know how to adjust the carburetor on a scooter using the adjusting screw. This need arises if the device does not start well, shows increased appetite, or the tachometer needle indicates unstable speed.

Adjust the Carburetor of the Suzuki Lets 2 Moped

Content

How to install a carburetor on a Suzuki Let's

please tell me how to set up the carburetor | Thread Posted by: Harivamsa

tell me how to adjust the carburetor

scooter suzuki sepia z.z.
how there is a carburetor as in the photo
Dmitry (Katya) Mikuni. there the air adjustment is located outside the adjusting bolt, but the fuel is inside the screw under the cable cover on top, I don’t remember exactly, but in my opinion 3-4 turns back after full winding

Vitaly (Mickey) tightens the screw under the cable cover, gasoline is regulated on this carburetor needle

Alex (Esther) The needle regulates the measured fuel flow inside the screw under the hood. This is an air nozzle. They must regulate the stability between the consistency of fuel and air. (If installed correctly, the scooter will consume as much gas as indicated in the evo properties) gas and it will leak a very rich mixture, which is very disadvantageous. And if you unscrew the screw one hundred percent, a very bad mixture of fish can be deployed on the step to turn the wheel, but the fisherman's power does not sit down, hit the throttle and stall!

READ Changing the Oil in the Haldex Skoda Yeti Clutch

Alex (Esther) Disassemble the carburetor.

Dmitry (Katya) Sori confused fuel with air

Sergey (Unmesha) Where is the idle speed adjustment bolt? Tell me Dmitry,

Sergey (Unmesha) Where is the tension bolt regulator Tell Alex

Alex (Esther) with the outside world

Andrey (Galayudha) Please leave the photo as a high-quality appearance! I just don't know, but I'm looking for the reason why the moped won't start!

Alex (Esther) https://suzuki-sepia.clan.su/publ/5-1-0-78 see here

Victor (Rashish) I’m going through everything now, but I have one problem: insane fuel consumption. I drove about 15 km and took 3.5 liters with me.

Cleaning the carburetor Suzuki Lets 2

cleaning carburetor suzuki allows 2

How to adjust the carburetor on a scooter. Theory (My rhythm 24, part 7)

My second channel. I'm on VK.

If anyone knows what the problem is, please tell me that there may be similar problems.
It's a sickly fancy carburetor .
There is also a 2nd carburetor, so there is no adjustment screw at all. If anyone knows how to set it up, please post. Alex (Esther)

READ How to Adjust the Carburetor on an Alpha

Ilya (Munir) Dmitry, but where is the fuel bolt?

Dmitry (Katya) Fuel bolt. this is a kind of plastic cover where the cable is attached to the valve.

Ruslan (Webber) modifies the piston engine stubbornly; it works like a piece.

Yuri (Gjurd). this is a lot of fuel consumption in my native Mikuni, how much of the needle is not adjusted, I tilted the float a little, checked for more overflow, I comply with the vacuum standards, tell me who has encountered this and at least reduced the consumption somewhat

Alexander (Balamani) Hello. Here's a cable dummy. I understand the needle. But after a thorough renovation, he switches to gas flooring. I think the mixture is rare or rich

Alexander (Balamani) The guys used to deal with this garbage for me, but today I found everything and tax and charged the battery. So ask a question. To reduce costs, replace the main nozzle. The one under the needle with a 0.6 mm hole

Tags: how to adjust the carburetor

on a
Suzuki scooter Come on
2

Cleaning Suzuki Lets 2 carburetors.

how to set up and clean the carburetor on a Suzuki allows 2 new ones | Topic author: Zoya

Maxim licks, sucks dirt and that's it.

READ How to Remove Fuel Tank Flange Ford Mondeo 3

Denis 1. Study the operation and design of this carburetor and all its systems. 2. Buy the necessary tools. 3. Buy the application. spare parts, including erasers, etc. 4. I have experience in repairing and adjusting carburetors. PS But for you this is nonsense.

Irina, I completely agree with the above. I dare add that the reason may not be in the carburetor at all. Therefore, you should still have an idea about the operation and structure of the car. You can study courses and work in a car workshop for several years. And you will succeed. It's very simple.

Idle speed: settings features

Adjusting the Suzuki Sepia carburetor is impossible without using the idle speed. It regulates the number of revolutions, where when the screw is tightened, the speed indicator increases and the wheel spins independently without the throttle. When you unscrew the idle screw, the scooter will start only when you add more revolutions with the throttle. It is advisable to adjust this jet last, that is, first adjust the quality of the mixture, the needle in the throttle valve, and, if necessary, the air screw, and then adjust the idle speed.

Scooters Maintenance and repair

Repair and maintenance manual for electrical equipment of the Suzuki Let's 2 scooter

In this diagram you will find the location and detailed designation of all electrical parts of the Suzuki Let's 2 scooters, and you will also be able to determine the purpose of any of the wires in the electrical supply system.
Each wire is marked with an original color, repeating that in the scooter's wiring harness. Each piece of Suzuki Let's electrical equipment is identified and signed.

The diagram is made entirely in Russian and allows even an inexperienced scooter rider to easily understand it.

You can find out how to check the serviceability of the electrical equipment of the Suzuki Let's 2 scooter in this article.

If the details of the instructions are not clear to you and you cannot figure it out and fix your problem yourself, you can use the comments field on our website, or register on the forum (the second option is more preferable).

You can also read other articles on the topic:

on “Repair and maintenance manual for electrical equipment of the Suzuki Let's 2 scooter”

help me figure out the Suzuki Lets 2 scooter with the battery there is a spark without it no I can’t find the reason I changed the ignition winding magnet relay-regulator no changes help me figure it out I will be very grateful

Isai replied: July 11, 2013 at 11:49 pm

Hello, as I understand it, you start it, then remove the battery, and the spark starts, i.e. he stalls! there is only one reason - the battery is not charging, here you first need to ring the relay, stand under the beak, the tester is in the diode position, there are 4 contacts they do not ring between each other and the ground, then the relay is intact, but if they show resistance in any position, then the relay 1 died, then you need to call the wiring, if the relay is intact, look at the diagram

help me figure out the suzuki lets 2 scooter I have speed protection when I go over 40 and it starts to reset how to remove the protection

Hello everyone, help on the Suzuki on the instrument panel there is a red light until it goes out, you can’t start the engine, but it’s not clear why this light starts flashing when driving and turns off the engine

Hi all. Guys, please tell me which belt is the suzuki lets 2 butterfly, otherwise I bought it with a non-original belt. The belt is new but slips

Terraflops replied: April 23, 2014 at 08:14

belt suzuki lets 2 16.5×664

Good day! I have a question. I bought a moped, Suzuki Lets 2, from the honest words of an equally honest owner, the scooter started and worked, but after the last start, it stood for 1.5 years. I took it to the garage, disassembled the plastic, sprayed everything I needed with WD, contacts with contact cleaner, connected the car battery, since the original one naturally died, but there was no response from the button. Moreover, after turning the key, the turn signals don’t work, the signal doesn’t work, the brakes don’t light up, but when you turn the key, somewhere in the middle position, the red lights come on, whether it’s oil or the speed limit, it’s not clear. If you start it with a kickstarter, the headlight comes on during cranking, but there is still no spark, so it won’t start. I changed the fuse just in case, a completely new spark plug. What else to watch? so visually, all the wiring is intact. The scooter generally arrived from Vladivostok in perfect condition. Thank you in advance.

Maxim replied: September 5, 2015 at 09:39 pm

you don’t have enough power, try pulling the kickstarter more than once, but several times; if that doesn’t work, put a toggle switch on the wiring to the headlight; when you start it, turn off the headlight; when you start it, you can turn it on

Oleg replied: April 24, 2021 at 11:12

The battery from the car cannot be taken to the moped. The amperage there is not the same. The wiring may burn out. If there is no fuse...

Purpose and principle of operation of the carburetor

The carburetor is an important component of an internal combustion engine, responsible for preparing the air-fuel mixture and supplying it to the working cylinder in the required ratio. A scooter engine with an unadjusted carburetor cannot function properly. The stability of speed, the power developed by the engine, gasoline consumption, response to turning the throttle, as well as ease of starting in the cold season depend on the correct settings of the engine power supply.

An important component of an internal combustion engine is the carburetor.

This unit is responsible for preparing the air-gasoline mixture, the concentration of the components of which affects the nature of the operation of the power plant. The standard ratio is 1:15. Leaning the mixture to a ratio of 1:13 ensures stable engine operation at idle. Sometimes it also becomes necessary to enrich the mixture by maintaining a ratio of 1:17.

Knowing the structure of the carburetor and knowing how to adjust it, you can ensure stable operation of the engine on two-stroke and four-stroke scooters.

Thanks to a properly configured carburetor, easy and quick starting of the vehicle engine is ensured, as well as stable operation of the engine, regardless of the ambient temperature. Any carburetor is equipped with jets with calibrated holes, a float chamber, a needle that regulates the cross-section of the fuel channel, as well as special adjusting screws.

The adjustment process involves specially rotating the screw in a clockwise direction or in the opposite direction, which causes, respectively, the enrichment or depletion of the working mixture. Adjustment measures are carried out on a warmed-up engine. In this case, the carburetor unit must first be thoroughly washed and cleared of blockages.