Accelerating on a scooter is one of the most exhilarating parts of the driving experience. Not only is it fun, but it's also an important part of driving; without it we couldn't go anywhere.
So it can be incredibly frustrating to experience acceleration issues with a scooter. You try to make it go up in the towers but nothing happens: it loses power and slows down, see hold. Not only is it frustrating, but it can also be a bit dangerous in a bad situation.
So why isn't your motorbike going up in the towers? There are three main reasons why your scooter does not go up in towers:
- Blocked jet in the carburetor
- Broken carburetor spring
- Air leak
In this article we will explain how to fix them.
Cause 1: Blocked jet in the carburetor
Unfortunately, there are a lot of things that can go wrong in a scooter carburetor, but luckily they are pretty straightforward to work with and fix.
If your scooter doesn't go up in turns, the first thing to look at is probably the jets inside the carburetor. Nozzles are tiny passages through which fuel flows to combine with air so that the engine gets the correct air-fuel mixture. These are the main jets and pilot jets.
How to fix it: If you suspect this is the case, you will need to remove your carburetor and partially disassemble it. This can be a bit boring, but it's good to examine and clean your carburetor every now and then. As a warning, spraying your carburetor with carburetor cleaner and saying it's okay does not count as cleaning; you will need to do a much more thorough cleaning than that.
You will need to remove the float bowl (and all bowls if there are more than one) and remove the jets. If you are not sure where your carburetor jets are located, you should be able to easily find a diagram online to locate them. It is usually easy to remove with a flathead screwdriver.
Then take the nozzle and spray some cleaner through it. Make sure you can see it coming out on the other end. You can also blow compressed air to make sure all debris has been removed. Repeat for all of the carburetor jets to make sure they are all clean. Having the right tools makes such a job a lot easier.
What you will need to repair scooter that does not go up in towers:
Cause 2: Broken carburetor spring
Even though it is a small part, the carburetor spring is a vital part of the functioning of the carburetor and the rest of the scooter. If it malfunctions in one way or another, you'll notice it quickly.
A broken carburetor spring is often responsible for several problems. These springs are located where the throttle cable goes down and connects to the carburetor. It is this spring that opens and closes the butterfly valve (also known as the throttle slide slide) when you accelerate.
If this spring is broken, it will not be able to open the butterfly valve and let air in. When you try to ride your scooter nothing happens, there is no air to mix it up. Your scooter then becomes rich in fuel and the wrong air-fuel mixture results in a loss of power.
How to repair your scooter:
If you think the carburetor spring is broken, you can easily diagnose it by turning off your motorcycle, removing the pod filters or airbox, and looking inside the carburetor to see the butterfly valve reaction. when you turn the throttle. If the butterfly valve doesn't have a lot of movement when you pull the throttle up, you'll know it's your culprit.
The easiest way is to completely disassemble the carburetor using a wrench to replace the spring. It's really not worth trying to fix the spring itself as they are inexpensive, although you have to buy a full carburetor rebuild kit to get it. While you're at it, you should clean the rest of the carburetor to avoid any future issues.
What you will need to repair scooter that does not go up in towers:
Cause 3: A scooter that does not go up in the towers due to an air leak
Air entering places where it shouldn't can be another culprit for the loss of power when accelerating your motorcycle. This could be due to faulty gaskets on the carburetor or cracked or loose intake ducts.
When a carburetor tries to make the right mixture of air and fuel for the engine, it happens inside the carburetor which must be tight and without disturbance for it to function properly. If air gets in through faulty gaskets or intake ducts, it can disrupt the correct mixture it is trying to make. This is called an air leak.
An air leak causes too much air to be added to the air-fuel mixture produced by the carburetor. When your scooter engine receives too much air and not enough fuel, it may not go up in revs. In fact, the more you try to fuel the motorcycle, the more air will be sucked into the unwanted holes, which will ultimately make you lose power.
How to fix it:
Examine your carburetor's intake bellows. It is quite common for them to crack or become brittle over time. Check that the quick-release hose clamps around the intake manifolds are tight and not allowing air to pass through. If necessary, replace the intake ducts.
You will also need to examine the carburetor gaskets. They are located between the float bowl and the rest of the carburetor. They can often become brittle and crack. Replace them if necessary after examining them to ensure a seal between the parts.
If you have a vacuum port between the carburetor and the top of the engine, replace the vacuum hose as originally. If the vacuum port was for a system you no longer need, you can plug it.
What you will need to repair scooter that does not go up in towers :
Learn more about your scooters:
Here is an article that serves as a guide and helps you choose your scooter better before purchasing. For this, we give you the details on the characteristics and the different types of scooter.
