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Scooter won't stay running

Sat for a few years without oil or gas. Put new plug and gas and oil. Cleaned carb and air filter. Barely runs if you hold it at full throttle. If you let go it cuts off. Please help

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  • 13 Answers

Tryijng running some stable throught that might help, even tho you ran carb cleaner through it there could possible still some gump stuck in the carb or fuel lines

Posted on Jan 03, 2014

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Posted on Jan 02, 2017

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  • 7 Answers

SOURCE: Hard starting when cold, runs rough at idle and any steady speed.

Your carburetors need to be cleaned. The pilot jets are at least partially plugged.

If you are comfortable doing this yourself, you need to remove the seats, fuel tank, and air induction system before you will be able to get the carbs out. Be carefull when removing the fuel tank, there is a wire harness that will need to be un plugged from it to remove it. The wire harness plug runs under the plastic tray under the seat. There are 3 plastic rivits that will need to be removed to get to the plug. The carbs come out as a pair, and can be tough to get back in the boots.

You need to remove the float bowls, remove the jets, and blow carb cleaner and compressed air through them all. The pilot jets are most likely the only culprit, but you might as well clean everything if your going to all the trouble. You should also blow carb cleaner and compressed air through all of the other passages while your at it. Make sure that you can see through the jets and there is no debris left in them. Make sure to clean the floats, needle valves, and float bowls as well.

Then re-assemble

This happens when the bike sits for long periods. The fuel we get now days has a very short shelf life before it goes bad. Fuel oxydizes over time, and it happens even faster in a small amount that is vented which is exactly as it is when its in the carburetors of a motorcycle. When fuel oxydizes and evaporates, it leaves a gummy mess behind. The pilot jets are the smallest passages that sit in the fuel, so they naturally plug first.

You can prevent this by keeping fuel stabilizer in your fuel when ever the bike will be sitting for long periods of time. Myself personally, when I store one for the winter, I like to leave the carbs empty.

Posted on Nov 26, 2008

  • 200 Answers

SOURCE: Engine stalls

I assume your bike has been in storage for awhile...Your engine is running on choke ONLY, that's why when you cover the air inlet it's the same as what the choke does.....your jets in the carb are clogged and will facilitate a removal and cleaning of the carbs my friend.....find a trusted mechanic and you'll be rolling in no time...Good Luck to you......Tim

Posted on May 09, 2009

  • 311 Answers

SOURCE: ltz 250 wont idle needs full choke to run.cleaned

hi,sounds to me like the air fuel ratio is all up the ***,locate the air/fuel screw on the carb(normally on the side)screw the screw right in untill it stops,then back the screw out 1.5 turns,this should get the bike to run without the choke,once you have the bike running simply turn the screw in or out untill the bike settles into a nice steady idle,should be good to go,hope this helps...cheers

Posted on Mar 27, 2010

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Yup 50 cleaned gas tank and carb will run about 50 feet down driveway acts like it runs out of fuel I can put my hand over the carb and it picks back up


Hi, Richard if your bike has been sitting idle for months or years and you did not do any pre-storage maintenance I feel your pain it will probably have a dead battery and not want to start or if it starts it will idle and run poorly then stall, here are the following steps necessary to complete in order to get your bike back to an acceptable running condition.
1. If your battery was 2-3 years old when you last had the bike running you should replace it.
2. If you believe your battery might still be serviceable remove it from the bike and put it on a 1 or 2 amp trickle charger for 24 hours. If it is the old lead acid type with visible cells and acid levels fill each cell to the top line with distilled water and replace the caps, run the vent tube into a plastic or styrofoam cup, any cells that are cloudy/milky replace the battery.
3. After charging remove the leads and let the battery sit for a couple of hours then check the battery voltage with a volt meter, you should have 12.5 volts or better, any readings in the 11 volt range you need to do a proper load test on the battery and replace as necessary, any readings in the 10 volt range you have a dead cell and the battery needs to be replaced.
4. Drain and flush fuel tank, google " how to clean a motorcycle gas tank" find a couple forums to view the different options available.
5. Remove and inspect your air cleaner paper elements that are not oil soaked can be cleaned with a soft brush and low pressure compressed air, oil soaked elements must be replaced. Gause mesh and foam elements can be cleaned by soaking them in a container big enough to completely cover them with a solution of 1 gallon of water and 1 oz. of Dawn dishwashing liquid for small and medium size elements, for monster size double the formula and let soak for at least one hour then rinse with warm water shake off excess and let air dry, "WARNING" do not use compressed air as this will embed micro-sized dirt and road grime and destroy the mesh pattern and stretch foam elements out of shape just squeeze it like a sponge and let air dry, use a fan if you're in a hurry. When completely dry spray a very fine mist of air filter oil evenly around the whole element.
6. Remove the carburetors, disassemble and decontaminate with a " CARB DIP" or if you have EFI remove injectors and clean with carb spray and compressed air
7. Remove fuel valve and filter disassemble and clean as necessary, remove, clean, and inspect fuel and vacuum lines and replace as necessary.
8. Replace spark plugs with new ones and check for spark.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
Won stay running
Scooter Troubleshooting Scooter won run All about Scooters
http://www.kymcoforum.com/index.php?topic=5869.0
http://www.scootermasters.com/manuals/kymco%20People%2050-complete.pdf

Nov 01, 2016 | 2005 Kymco yup 50

2 Answers

Scooter has 40 original miles.New,old gas, I put innew gas. It starts,idles only, if I give it gas it stalls and won't run..


Hi, Rick if your bike has been idle for months or years and does not want to start you will have to deal with a few remedies:
1. Drain and flush fuel tank, google " how to clean a motorcycle gas tank" find a couple forums to view the different options available.
2. Remove your air cleaner and clean and re-oil per Mfg. specifications.
3. Remove the carburetor, disassemble and decontaminate with a carb dip or if you have EFI remove injectors and clean with carb spray and compressed air
4. Remove fuel valve and filter disassemble and clean as necessary, remove fuel lines and replace with new ones.
5. Replace spark plug with a new one and check for spark.
For more information about your question please visit the website below. Good luck and have a nice day.
How to clean carburetor in 15 minutes

Nov 25, 2015 | GAS Motorcycles

1 Answer

Motor fires up fine runs slightly rough for about 10 seconds then smooths out for about 5 seconds and cuts off. Will start right back up after about 5 seconds and does the same thing. I have drained the...


Previous owner had way overfilled crankcase oil. Oil had gotten into carb and clogged air filter. Drained oil to correct level. Ran engine but kept cutting off-see above. Took off carb cover cleaned housing and ran without air filter-ran fine. Unsuccessfully tried to clean air filter with gas-did not work. Apparently, the engine could run just long enough to exhaust the air in the old filter and cut off which is why it would start back up after a few seconds. Bought new air filter-whole thing-about $15 at Carquest. Put in some carb cleaner and installed the new filter and it runs perfectly.

Jun 10, 2014 | Homelite Pressure Washer. 2700 psi 2.3 GPM...

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overhaul the carb and check you air filter.

Jan 03, 2014 | Transport Schwinn Rechargeable Portable ...

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Clean the carb, gas tank and fuel line (s). Replace air filter with a new one, I wouldn't recommend that you run it without the filter because that allows dirt and grass debri to enter the carb, fuel line and gas tank.
Replace the plug with a new one that is recommended for your engine.
Check oil level.

Other option is lawn mower repair shop....

Hope this helps, I had the same problem.

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1 Answer

Generator Won't start


Gap the plug at .030 What is most likely the main problem is whatever gas sat in the carb. Even with fresh gas there will be some old gas still in the float bowl. You may be able to drain the bowl and be OK but I have a feeling that the carb will need to come off and be disassembled and cleaned properly. You can try spraying carb cleaner (I dislike starting fluid as it is too volatile and carb cleaner does just as well in this instance) into the carb/intake. Remove the air filter, open the choke, and spray the carb cleaner in through that way if possible. You can actually keep an engine running by spraying with short bursts. Even by just spraying once you should be able to get the engine to start. If it does start but then will not stay running without spraying more into the engine then it is a carb problem.

Aug 24, 2012 | Coleman Powermate 6250 10hp Generator

1 Answer

Scooter sat for a year; wouldn't start; replaced battery. filled with gas. cleaned spark plug. won't start. Help


after a year sitting idle chances are that the gas inside the carb has degraded and the carb will need cleaning also when you filled the tank did you remove any old fuel? if not the its contaminated with the old gas
give it a full service new feul clean carb clean air filter then it should start

hope this helps

john

Jun 30, 2011 | Aprilia Scarabeo 50 Four Stroke...

4 Answers

Scooter has not been started for over 1 year and will not start. New battery added and fuel has been reolaced. Scooter will turn over but not fire. Is there a fuel on/off switch? Is there a choke?


Start by checking to make sure the kill switch is set to "run", as nothing will start the bike if it's "off". And that all the fuses are good. (There should only be two)
Just like a no start problem with a car, it's going to be one of the big three: Fuel, Air or Spark. You can start by removing the spark plug and checking for spark by holding the plug with the plug wire attached, in a gloved hand, near to a part of the frame and turning the engine over. Be aware that it will shock you, if you are not careful.
If no spark, the Stator/ magneto (alternator), Capacitor Discharged Ignition or CDI (timing), or Regulator/Rectifier (voltage control and conversion) could be faulty, and there are no real good tests for these other than using another scooter that works, changing out the parts and rechecking.
If you do have spark, check the fuel by removing the air filter and spraying a small amount of starting fluid into the air intake. Please note however that these scooters require an exact airflow and the bike may not run or idle without it's filter.
Did you clean out the carburetor, or dump the float bowl? If so, it can take a ton of cranking from the engine to put out enough vacuum to draw gas back in. Starting fluid can sometimes get the carb to fire enough to start the engines vacuum.
And if that didn't work, air could be the problem. These Chinese scooters usually don't have many vacuum lines, there is one on the fuel pump, and one on the carb.There is a choke on the carb, but it is electronic and should be self adjusting, requiring no maintenance.

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2 Answers

Bike sat for awhile, runs but doesnt idle very good. cuts out


I would remove and clean the sparkplugs - sounds like one may be fouled.

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defiantly the carb but its not bad - clean / soak it with some seafoam and blow out all the holes. its just clogged and isnt getting the fuel/air mixture right.

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