How To Set Scooter Idle Mixture Screw 

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If you're having trouble starting your scooter in colder temperatures, adjusting the idle valve might help, but it's not the only factor to consider. Here are some steps you can take to diagnose and potentially fix the issue: First, check the spark plug to ensure it's clean and in good condition, as a fouled or worn spark plug can make starting difficult. Make sure your fuel is fresh and that there are no blockages in the fuel lines, since old or contaminated fuel can cause starting issues. Adjusting the idle valve can help if your scooter is not idling properly, especially in colder weather. Turning the idle screw slightly clockwise can increase the idle speed, which might help with starting. Additionally, check the battery to ensure it's fully charged, as cold weather can reduce battery performance, making it harder to start the engine. If your scooter has a manual choke, use it when starting in cold weather. An automatic choke might need adjustment or maintenance if it’s not working properly. Ensure the carburetor is clean and functioning correctly, as a dirty or misadjusted carburetor can cause starting issues. Low compression could be a problem, especially if your scooter has many miles on it. Performing a compression test can determine if this is the issue. If compression is low, it might be necessary to replace or rebuild parts of the engine, like the cylinder or piston rings. Lastly, check and clean or replace the air filter, as a clogged air filter can restrict airflow and make starting difficult. Start with the simpler checks (spark plug, fuel, battery, and air filter) before moving on to more complex adjustments and tests (idle valve, choke, carburetor, and compression). If you're not comfortable performing these checks and adjustments yourself, it might be a good idea to take your scooter to a professional mechanic for a thorough inspection and tune-up. Thank you for watching my video

Hello my friend try another half turn counterclockwise to see if that makes a difference but you also have to make sure your jets inside your carburetor are clean

@@VirberelloScooterTips jets are clean, and i would be turned out approx 3 turns on the screw, which appears to be alot... should i also move up a jet size to compensate for lean?

But my bike run fine on idle when i remove adjustment screw, but when i put that screw in engine will go out without giving race.

yes butt you must be carefull because if you turn the air screw in your mixture will be richer ,but if you turn the fuel screw in your mixture will be leaner !

Hello my friend no I didn't have that problem yet try to unscrew the screw all the way out to see if there is a rubber o ring that you need to replace or is missing or sometimes is dry from ageing

@@VirberelloScooterTips going to check that didn't even think of that

Hello Lynda the straggler hose line coming out of the top of the carb is a over flow just in case the fuel is not able to go the the motor will go out from the top if to much pressure is on the lower part of the carb. Thank you for watching my video

Hello Adjusting the idle speed on your scooter may help address the issue you're experiencing, but it's important to consider other potential causes as well. Here are some steps you can take to troubleshoot and potentially resolve the problem: Check for Vacuum Leaks: Vacuum leaks can disrupt the air-fuel mixture, causing the engine to stall at idle or low speeds. Inspect the vacuum lines and connections for any cracks or loose fittings. Clean or Replace the Carburetor: If your scooter has a carburetor, it may be clogged with debris or have a faulty idle circuit. Cleaning the carburetor or replacing it, if necessary, can improve idle performance. Inspect the Spark Plug: A fouled or worn-out spark plug can lead to stalling issues. Check the condition of the spark plug and replace it if it's worn or fouled. Fuel System: Ensure that the fuel system is clean and free from obstructions. A clogged fuel filter or fuel line can cause fuel delivery issues. Idle Speed Adjustment: Since you've already adjusted the idle speed to around 2000rpm, it's at a reasonable level. However, if the issue persists, you may want to consult your scooter's manual or a mechanic to ensure you're adjusting it correctly. Throttle and Idle Screw: Check the throttle cable and the idle screw for any issues. Sometimes, a sticky throttle or improperly adjusted idle screw can cause stalling at low speeds. Electrical System: Inspect the electrical components, including the ignition system and wiring. Loose or damaged wires could lead to intermittent stalling. Air Filter: A clogged or dirty air filter can affect the air intake and cause poor idling. Make sure the air filter is clean or replace it if necessary. Fuel Quality: Ensure that you're using clean, fresh fuel, and that there's no water or contaminants in the fuel tank. Temperature: Sometimes, scooters can experience idling issues when the engine is too hot or too cold. Ensure that the engine is running within the recommended temperature range. If you've gone through these troubleshooting steps and the issue persists, it's a good idea to consult a professional scooter mechanic. They can perform a more detailed diagnosis and address any underlying issues that may be causing the stalling problem Thank you for watching my video and please click like on my video so others can find my channel

Hello Riccardo good idea I will work on it thank you

@@VirberelloScooterTipsplease!

The mixture screw, also known as the air-fuel mixture screw, typically has a specific assembly order for its components: washer, o-ring, and spring. Here’s how to assemble them: Spring: This is the first component to be placed onto the mixture screw. Slide the spring onto the screw until it reaches the base of the threads. Washer: After the spring, slide the washer onto the mixture screw. The washer provides a smooth surface for the o-ring to seat against and helps prevent damage to the o-ring from the spring. O-ring: Finally, place the o-ring onto the mixture screw. The o-ring sits between the washer and the carburetor body, providing a seal to prevent air or fuel leaks. Assembly Steps Insert the Spring: Take the mixture screw and slide the spring onto the screw until it reaches the bottom. Add the Washer: Next, place the washer onto the mixture screw, right on top of the spring. Add the O-ring: Lastly, place the o-ring onto the mixture screw, ensuring it is seated properly against the washer. Installation into the Carburetor Carefully Insert the Mixture Screw Assembly: With the spring, washer, and o-ring properly assembled on the mixture screw, carefully insert the screw into the designated hole in the carburetor. Tighten the Mixture Screw: Gently turn the mixture screw clockwise until it lightly seats. Do not overtighten, as this can damage the tip of the screw or the seat in the carburetor body. Adjust the Mixture: Once the screw is seated, you can begin to adjust it according to the specifications for your particular engine or carburetor. This order ensures that the o-ring provides an effective seal and the spring maintains the tension needed for proper adjustment. Thank you for watching my video

If you're experiencing gas flowing out of the air filter side of the carburetor on your scooter, it could be indicative of several potential issues: Float Needle Valve Issues: The float needle valve in the carburetor may be stuck or not sealing properly. This valve regulates the flow of fuel into the carburetor bowl. If it's not functioning correctly, excess fuel can enter the carburetor and flow out through the air filter. Float Level Adjustment: The float level might be incorrectly set. If it's set too high, it can lead to an overflow of fuel into the carburetor, causing gas to leak from the air filter side. Dirty or Clogged Carburetor: Dirt, debris, or varnish buildup within the carburetor can obstruct the proper functioning of various components, including the float needle valve. This can lead to fuel overflow. Faulty Carburetor Gasket: The gasket between the carburetor and the air filter housing may be damaged or improperly installed. This can result in a poor seal, allowing fuel to leak out. Venting Issues: The carburetor needs proper ventilation. If the venting system is blocked or malfunctioning, it can cause pressure imbalances, leading to fuel leakage. Fuel System Issues: Problems with the fuel supply system, such as a malfunctioning fuel pump or a clogged fuel line, can contribute to excess fuel entering the carburetor. Incorrect Jetting: If the scooter has been modified or tuned, and the jetting (fuel/air mixture) is not set correctly, it can lead to excessive fuel entering the carburetor. I hope this can help you

Hello my friend if your scooter shakes could be idle is to high

Hello the scooter accelerates after you started up because of the enricher but you can set the idle screw lower after 3 minutes you started the scooter that is when the rpm start to relax a little and the motor is hot

@@VirberelloScooterTips thx bro 🙏🏽

Hello if you have a gy6 150cc you have only to tipe of pads one is sqare no abs amzn.to/3ygifpX and one is half moon shape with abs amzn.to/3yj4ZRe but the best thing you can do is to remove the one you have and make sure you buy the right one

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Ah ah I’ m in WPB my friend I will love to check you bike but I do not have much time because my work place they are short in staff and they do not give me much time off summer time was my vacation time but now lots off people move in Florida and we are very busy in the summer too ah ah

@@VirberelloScooterTips brotha so unfortunate well if you ever come by the beach hmu I have a issue now idk if I gotta replace the air filter but my bike has been slowing down sometimes and I used to go 45 no now it goes 37 38 to 40 than is drastically go slower little by little and up a bridge goes down to 28mph when it used to go up the bridge at 31 32 mph

Hello my friend spark plugs can turn black on a scooter due to several reasons, including: Fuel mixture: A rich fuel mixture can cause the spark plug to turn black. This happens when there is more fuel than air in the combustion chamber, leading to incomplete combustion of the fuel. As a result, the unburned fuel particles accumulate on the spark plug, making it black to fix the problem place a smaller main jet accordly to your location. Oil contamination: If there is oil in the combustion chamber, it can get onto the spark plug and cause it to turn black. This can happen if the piston rings or valve guides are worn, allowing oil to leak into the combustion chamber. Carbon buildup: Over time, carbon deposits can build up on the spark plug, causing it to turn black. This is more likely to happen if the scooter is used for short trips or if the engine is not properly tuned. To prevent your spark plug from turning black, you can ensure that the fuel mixture is correct, keep your engine well-tuned, and replace the spark plug regularly. Thank you for watching my video

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@@VirberelloScooterTips You look great!

Hello Robert did you check if your air filter is clean ? because if your scooter work great without the filter there is a chance that your air filter is dirty but sometimes the problem can be a dirty main jet inside the carburator. Thank you for watching my video

@@VirberelloScooterTips the carburetor is brand new but the airbox is the wrong size for the moped.Could the airbox size be the problem

Yes that could be a a problem if the air box is to small you will have less volume of air if your scooter run perfect with out the air hose connected the problem is the air filter

Hello my friend no problem if you like to idle your scooter little higher but you can not put to hight because when you stop at a traffic light your scooter wil try to move unless you pull your brakes

@@VirberelloScooterTips thanks!!!

Hello John I have a feeling that your motor is running to lean and is burning or melting your sparkplud eletrode tip you need to lower the temperature of your motor that will give a longer life to your motor and the sparkplug to lower the temperature of your 150cc gy6 scooter just change the main jet inside your carburator to a #115 main jet or if your location is at sea level place a #120 main jet that will lower your motor temprature also change oil to mobil 1 10w-40 full synthatyc because is slipperier than conventional oil which means less friction in your engine so your engine will run cooler, wears less and lasts longer. Thank you for watching my video and be safe

@@johnlovell1035 If the chains are not to expensive is good to have them in the house or just wait to see if you do not really need them for now

Hello my friend you need to open the carb and see if the main jet is dirty also check the carb rubber Diaphragm to make sure is not sticking to the wall of the carb or the rubber is broken . Thank you for watching my video

@@VirberelloScooterTips you were right, the main jet was dirty. Now it runs like it was new again. THANKS, YOU SAVED ME FROM A NEW CARBURETOR AND INSTALLATION CHARGE.

@@albertolewinton7545 Hello my friend fantastic I'm very happy for you

Hello my friend I think you need to check valve clearance that could be the problem

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Great info Thank you for sharing

@@VirberelloScooterTips your welcome anytime mine is the 49 cc

@@VirberelloScooterTips mines the 50 cc model. Has a filter and full exhaust as well. Cdi box and clutch next

Hello my friend that could be the pilot jet inside the carburetor that needs to be clean or low compression in the motor and you can do a valve adjustment. Thank you for watching my video

@@VirberelloScooterTips I had a valve adjustment done this week by a mechanic and I have checked the pilot valve and it is clean.

Ah ah ah you right I should make a video How Tuco can fix a scooter

Hello my friend make sure you do not have any vacuum leak and make sure the fuel goes to the carb

Hello my friend that screw will only help when you are at idle around 1k rpm above that main jet will take care of the fuel flow so if you change lots of things on your scooter try to change your main jet base on your altitude that can help you a little . Thank you for watching my video

Thank you so much for replying much appreciated.

Hello Og Mendy if your scooter is not running fast you can do lots of little modification like change roller weight to 12g, reject your carburetor , iridium spark plug , performance cdi, performance coil , performance cone air filter and lots more mods that will make your scooter rock

@@VirberelloScooterTips you are amazing thanks a lot how can I have your contact

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