The Ultimate Guide to Cleaning Your Carburetor | SYM 125 Jet Power Motorcycle

Are you experiencing difficulty with your SYM 125cc scooter or motorcycle? One common issue is a dirty carburetor, which can cause poor engine performance and decreased fuel efficiency. Fortunately, regular cleaning and maintenance can prevent these issues and keep your engine running smoothly.

SYM 125 Jet Power Carburetor

This tutorial will guide you through the step-by-step process of disassembling and cleaning the SYM 125 Jet Power carburetor. Our guide includes a list of tools and materials you'll need and time stamps for each step, so you can follow along easily.

Step 1: Remove Carburetor

1. Remove the luggage box. Click HERE to learn how to remove the luggage box.
2. Unclamp the carburetor isolator, detach the fuel pipe and vacuum hose, and loosen the adjustment nut and fixing nut of the throttle valve cable to release it from the carburetor.

   

   Remove fixing nut

3. Release the clamp strip of the air cleaner. Disconnect the auto-by-starter connectors and take the carburetor out.
   
   

   

   Take out carburetor

   
   

Step 2: Remove Auto by Starter

1. Take out the screw from the fixing plate, then remove the plate and the auto by-starter
   from the carburetor.
   
   

   

   Auto by starter taken out

   
   
2. Remove the auto by-starter chamber.
   
   

   

   Auto by starter chamber

   
   

Step 3: Remove the Vacuum Chamber

1. Loosen the drain screw to drain the residual fuel in the float chamber. Remove the two screws of the vacuum chamber cover and take off the cover.
   
   

   

   Unscrew vacuum chamber

   
   
2. Remove the compression spring and the vacuum piston
   
   

   

   Vacuum piston with compression spring
   

Step 4: Remove Float Chamber

1. Remove the 4 screws holding the float chamber cover.
   
   

   

   Remove the float chamber cover

   
   
2. Remove the components of the main jet, fuel needle jet holder, fuel needle jet, slow jet,

   and the screw for adjusting the fuel amount.
   
   

   

   Remove the fuel needle jet holder

   
   

Step 5: Remove Air Cut-Off Valve

1. Remove the clamp on the vacuum hose, then take out the hose.
   
   

   

   Remove clamp

   
   
2. Remove the clamp on the vacuum hose, then take out the hose.
   
   

   

   Unscrew the air cut-off valve cover

   
   
3. Remove the screws securing the air cut-off valve and its cover, then take out the spring
   and vacuum diaphragm.
   
   

   

   Remove the spring and vacuum the diaphragm

   
   

Step 6: Clean and Dry

1. Clean carburetor components using an ultrasonic cleaner filled with water, dish soap or detergent powder, and fuel.

   

   Cleaning using ultrasonic cleaner

2. Blow out all residual water from the components using compressed air, and let them dry in the sun.
   
   

   

   Blow using compressed air

   
   

Step 7: Install the Carburetor Components

1. Install the carburetor components in reverse order of removal.
   
   

   

   Carburetor installation

   
   

Step 8: Test

1. Start the engine. In the next tutorial, I'll show you how to tune the carburetor.
   
   

   

   Start the motorcycle

   
   

You can find a list of tools and materials to purchase below:

Tools/Components/Items (Shopee):

1. Screwdriver Set
2. Spanner Set
3. Ultrasonic Cleaner 6L

Tools/Components/Items (Lazada):

1. Screwdriver Set
2. Spanner Set
3. Ultrasonic Cleaner 6L

Tools/Components/Items (Aliexpress):

1. Screwdriver Set
2. Spanner Set
3. Ultrasonic Cleaner 6L

Video:

That's all from me. If you have any suggestions, please write in the comment section. Thank you for your time 👷.