Question about 2005 Kymco Zing 125

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Engine Ok i opend up the airbox on my moped hoping to uncork it a bit

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Then i rode it and it bogs out now i realize that it needs to get more gas and have the exhaust opened up too do i have the right idea i need some input on what to do to fix this!,With any engine, if you give it the potential to pull more air (like you did with your airbox) and breathe better (like you did with your exhaust), you have to keep the balance of fuel by jetting. Hopefully the carburetor on that machine is adjustable. If not, but it back to stock.,,,

Posted on Nov 10, 2008

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Posted on Jan 02, 2017

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Why is my lexmoto so slow its a gladiator 125 has no power at all and barely goes 40 and takes years to get there and my mates 50cc is faster! why

Hi, Ateek you can thank Scooter Therapy for this novella. There are few things you need to look at when trying to troubleshoot your scooter for power loss. How does it sound? If you run it wide open throttle when warmed up, does it peak out? or stutter? is it loud, or very quite the symptoms can help decide what to try. When you are going full throttle, the engine should get to a high RPM and sound smooth here are a few things you should look for:
1. Plugging air intake- will start well cold, but be hard to warm up and not reach top speed. The engine will stutter at high RPM.
2. Open air intake- to much air or air cleaner is disconnected- engine will not have power at high speed, make vacuum cleaner sound. Acts like it's running out of gas. ( sounds almost the same as a dirty carburetor.)
3. Plugged exhaust port the engine sounds and runs good, but has no power. Slow to take off. Same as plugged muffler, but if the muffler is plugged you get a very smooth exhaust note at idle. Humming instead of pop pop pop pop.
4. Fouled spark plug- backfire. If you get backfire, pretty good chance the plug is fouled.
5. On models with belts, the gear ratio drops as the belt gets thinner (most hondas have belts).
6. On a moped with high mileage, the belt will cause slow top end speed if worn thin.
7. If you have a bike with chain drive in an oil bath and you "OVERFILL" the oil amount in the chaincase, that makes for slow running as it requires too much power to turn the oil.
8. If your engine does not rev up well and stutters or sputters, like when it is cold with the choke on, the engine is running too rich. (too much fuel).
9. Is the air filter soaked with oil? Clean with soap and water!
10. Is the air opening in the airbox plugged? Very common for a spider or mud wasp to build a nest in one of the intake holes.
11. On some scooters it is common to get a leaf stuck in the intake port of the airbox, causing a 10mph drop in top speed.
12. Don't try to adjust the screws on the side of the carb to get lean or rich, as they are for the idle circuit only.
13. The idle air screw should be about 1 1/2 turns out on most scooters.
14. Say your engine revs but kind of wheezes or acts like it runs out of gas it is common to have a buildup of hard carbon on the inside diameter of the hole in the main and pilot jets, and it must be carefully removed.
15. If your moped does not idle the pilot jet is likely plugged.
16. Anytime a moped has not been used for 1 year or more, and still has the same fuel in it, good chance you will need to clean the jets.
17. The poor quality of today's gasoline has made this a rather steady bet.
18. Mopeds are affected more than most vehicles because the small size hole the jet requires is easily plugged, even by thick oily fuel, or water.
19. Drain your carb once in awhile! Most have a screw of some type at the bottom (where the drain needs to be) of the carb.
20. Make sure the air boot to the airbox is not on wrong, kinked, hard and shrunken.
21. Don't oil the air filter if you got the stutters.
22. On some scooters, you can leave one snap loose on the airbox lid to allow it to crack open, to get full rpm.
23. "WARNING" too much lean out on the gas, and since the fuel cools the piston, the piston can "MELT"
24. Still slow? Check the muffler tip. Make sure no carbon buildup is inside the tip, stick something in as far as it will go.
25. Common on some scooters to have the tip bent over on a curb, then carbon up solid. common of all types to have the whole muffler plug.
26. When you have the muffler off, is it heavy?
27. Can you get the baffle out to see if the holes are plugged?
28. Check the exhaust port on the cylinder.
29. If you can't see all the way into the piston, use a mirror and a flashlight to make sure the piston is ok and the port is not plugged where it meets the piston.
30. Common on all models to plug here, Just scrape it out so the hole is full size again.
31. Don't worry about the small film on the inside of the port, I am talking about a very thin film that forms a wall in the exhaust port right next to the piston.
32. A 1 1/2 inch hole can be reduced to the size of a pea...... With a thin film of carbon.
33. If you can see the piston ok, it's not the problem.
34. If you are in doubt regarding your exhaust pipe being plugged, put your hand behind the muffler to see how much pressure is expelled. compare to another bike.
35. It should blow pretty good and have a distinct pop pop pop pop sound while idling, not a steady humming.
For more information about your question and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
Why is my motorcycle losing power when accelerating
Scooter Questions Get Answers to Your Scooter Starting Question
Haynes Chinese Scooter Service Repair Manual 4768 for Lexmoto Gladiator 125
Lexmoto Gladiator 125cc

Mar 31, 2017 | Motorcycles

1 Answer

Moped 2 cycle, starts but will not run. Changed plug, tested wire and coil, runs for about 10 seconds and stalls?

Hi Jim:
Dolls, Playsets & Toy Figures???? Must be some moped!
On to the problem.
Since it runs a bit, I'd assume that the ignition is OK so would look to fuel delivery as the probable problem.
- If there is a fuel filter, I'd clean or change it.
- Good idea to make sure the air filter is clean.
- Flush the carb.
- Fresh gas in the tank?
Hope this helps

Sep 17, 2015 | Toys

1 Answer

What spark plug do i need for a Yamaha M S 50 moped 1986

take out the old plug and the details are on the ceramic bit
the new plug will be gapped correctly.
brand doesn't matter

Jul 24, 2014 | RTO 50cc Moped Scooter

1 Answer

Mobibak software is problem for my nokia n70.kindly tell soultion to solve for mobibak

hey buddy dont worrie, i've 2 solutions for u. The 1st one is try to minimize all ur opend programs, ( hold the menu key for 3 seconds) then u'll find mobibak opend, if u cant c it, try this till u c it.. Then point on it and press the cancel key (c). Then press ok. Then will be free of mobibak. The 2nd solution is put ur files in ur pc or other memory then format ur phones memory. I hope this will help u. Hbehailu

Jul 04, 2011 | Nokia N70 Cellular Phone

2 Answers

Hi my gpz1100 has had 2 carb cleans now wihin 2

have the carbs been Balanced?,check for any air leaks around carb - engine rubbers - airbox rubbers for cracks

Oct 28, 2009 | 1995 kawasaki GPZ 1100

1 Answer

Peugeot jet force 50 engine cuts out on overrun

when the engine dies pull out the spark plug and earth the plug on the metal part and turn it over dont hold the spark plug as you will get a shock if the plug sparks you know the ignition system is working.if you have no spark do a compresion test to see if there is a problem with the engine.if that ok you will have a fuel problem make sure the breather on the fuel tank isn blocked or trapped.

Oct 08, 2009 | 1976 Honda CB 100

1 Answer

Running problem

Why are you running it with the valve cover off? Doesn't oil fly everywhere? Are you sure it's the valve cover you're referring to and not the airbox cover? If it's the airbox cover, you need to clean or replace the air filter. If that doesn't work, write back.

Sep 26, 2009 | Transport Schwinn Rechargeable Portable ...

1 Answer

Where is the map sensor located on a 2001 daewoo nubria

Usually on any car it is located between the airbox where your air filter is hidden and the engine itself. It can be either on the hose connecting the airbox to the engine, inline with it if you prefer, or it can be bolted directly on the back of the airbox. So best bet would be to take out the airbox from under the hood to see clearly, and you probably will have the sensor in hand anyway when you take out the airbox.

Jul 07, 2009 | 2001 Daewoo Nubira

1 Answer


the countershaft seal can be pried out easily,just dont do much damage to seal surfaces(on the motor).

as to your jetting problem,put the clip on the main needle back to "stock".

and buy several "main"jets,larger,and,smaller.
"jet-tests"MUST be done after a high-speed test(check sparkplug color,should be "tan")

poping,most all the time (on bikes)is caused by an air-leak somewhere along the exhaust system,

ALSO,when you change:
--it's a GIVEN to re-jet the carb!!

Dec 26, 2008 | 2003 Honda XR 650 R

1 Answer


then i rode it and it bogs out now i realize that it needs to get more gas and have the exhaust opened up too do i have the right idea i need some input on what to do to fix this!,With any engine, if you give it the potential to pull more air (like you did with your airbox) and breathe better (like you did with your exhaust), you have to keep the balance of fuel by jetting. Hopefully the carburetor on that machine is adjustable. If not, but it back to stock.,,,

Nov 10, 2008 | 2005 Kymco Stryker 125

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