Question about Daelim S2 250 Motorcycles

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Where are the air fuel adjustment screws on a daelim 250 s ,carberetor?

My scooter starts and ideals , but when i give it gas it dies.

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 3567 Answers

SOURCE: Hyosun Scooter Carb Adjustments

Very good thought process on the adjustments. The throttle screw sets the idle speed and the air screw sets the fuel mix at idle speed. The stock setting is 1.5 turns outward. IMPORTANT > do not tighten these two adjusters down. Only screw these in until they LIGHTLY seat. Now turn each adjuster one and one half turns outward.

From this point you adjust the idle speed then adjust the air screw for fastest idle speed at that throttle screw setting. If the idle speed becomes faster than desired after adjustment, just reset the throttle screw and then reset the air screw.

A “very helpful” rating for this answer? Thanks!

Posted on Jun 27, 2009

  • 3 Answers

SOURCE: Where is the idle screw, air/fuel adjustment screw on a VT750Cd

It just need to be perfect keep trying different air flows

Posted on Aug 18, 2009

  • 70 Answers

SOURCE: as soon as slide adjusted to give slightly faster

Clean carb and fuel system out. Make sure fuel is fresh.

Posted on Oct 24, 2009

  • 2 Answers

SOURCE: where is the idle speed adjustment for the Daelim

on the carbaretor its a black plastic nut

Posted on Sep 13, 2010

  • 3567 Answers

SOURCE: The 2006 Daelim History Scooter

Slow speed circuit in the carb is clear and working as it should. The main jet is plugged with a bit of trash or is sucking water built up in the carb float bowl from condensation in the gas tank.

Posted on Mar 12, 2011

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1 Answer

My Sym moped starts but won't idle It shuts off when trying to give it gas


Hi, Gigi and the usual suspects are:
1. Fuel cap or fuel tank is not venting properly.
2. Fuel filter clogged.
3. Fuel line pinched or kinked.
4. Float needle and seat sticking.
5. Float level too low.
6. Carburetor bowl vent line clogged/blocked/pinched.
7. Idle adjusting screw set too low.
8. Air/fuel mixture screw set too lean.
9. Idle port, transfer ports, slow air jet clogged.
10. Slow fuel jet clogged.
11. Faulty fuel pump.
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My 50cc kymco scooter starts but when you pull the throttle back it cuts out


Hi, Christopher and the usual suspects are:
1. Idle circuit and transfer ports clogged.
2. Air fuel mixture adjustment too lean.
3. Pilot jet clogged.
4. Faulty accelerator pump.
5. Float level too low.
6. Float bowl contaminated old fuel, water, dirt, rust, etc.
7. Float bowl vent or overflow tube clogged.
8. Fuel flow to carburetor restricted.
9. Intake manifold leak.
10. The gas cap is not venting properly or fuel tank venting system blocked.
11. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
12. Needle and seat stuck closed in the float bowl.
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What are the valve adjustment specs for a 2008 Roketa 250 cc scooter


2008?? right their is valve with a vacumn pipe from the inlet manifold to the valve on the bottom of the fuel tank ,gravity fed . check the pipe and if its not split or perished then you may need a new valve

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1 Answer

Vanguard V Twin 18 hp. monted in Cushman Motor scooter, runs great at W.O.T and at on quarter throttle, misses at range inbetween


Sounds like your carb needs the fuel/air mix adjusted..uses all the gas at high speed but has excess at low speeds...find your adjusting screw and at med throttle slowly screw it clockwise until the engine starts to sputter then back it out until it starts to sputter again then continue to do this until you reach ideal mix where it runs the best it can..then go slowly through the throttle up and down..when set..unjust your idle speed screw to your ideal idle speed..if this dies not fix ..carb will bed cleaned or rebuilt. Good luck.. Note always push or pull your throttle handle slowly to position avoids gas load up causing sputter and backfire.

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I looked at a 05 freedom 250 scooter today that is for sale. The scooter has less then 500 miles on it. The owner states that he just paid $400.00 to have the carb worked on and fuel pump replaced. The...


Hi, Rmupdyke the following applies to carbureted also fuel injected models and the usual suspects are:
1. Severely discharged or damaged battery, 9 volts or lower.
2. Failed alternator/generator and or voltage regulator.
3. Loose or corroded battery terminals and or cables especially the "NEGATIVE" cable, look for loose, corroded, or broken connectors inside the cable harness at "BOTH" ends.
4. Failed main circuit breaker or ignition switch, check for loose connections and continuity.
5. Failed system and or ignition relay, check for continuity.
6. Failed ignition coil, ignition/electronic module.
7. Failed CKP, CPS, CMP, MAP, TPS, or BAS sensor, corroded, loose or broken wire connector pins/sockets.
8. Throttle cables and or idle speed improperly adjusted hot idle speed should be 950 RPM to 1000 RPM.
9. Air/fuel mixture screw improperly adjusted.
10. Water or dirt in the fuel system, carburetor or filter.
11. Restricted, blocked or kinked fuel line.
12. Fuel tank empty.
13. Gas cap is not venting properly or fuel tank venting system blocked.
14. A failed fuel pump, pressure regulator and or fuel injectors.
15. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
16. Needle and seat stuck closed in the float bowl.
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1 Answer

The 2006 Daelim History Scooter we have will crank, but when you give is gas, it immediately dies. Why? Could it be a fuel pump problem?


Slow speed circuit in the carb is clear and working as it should. The main jet is plugged with a bit of trash or is sucking water built up in the carb float bowl from condensation in the gas tank.

Mar 10, 2011 | 2006 Daelim History

1 Answer

Fuel Mixture Ratio Is it - 25:1 40:1 50:1


not sure if yo are changing the jets out but if your using the original screws and jets screw both screws in till they stop then turn 1 and a half turns out they try starting if it kicks and won't run then turn each screw another 1/2 turn out try starting if it runs rough adjust the gas jet a little bit till it runs smooth once it warms up give it full gas and you should get just a slight puff of black smoke to be set right, if it's too lean it will get hot and will be hard to start if it dies, if that happens then give it extra gas. once warmed up it should idle without dyeing if it dies adjust the idle screw up 1/4 turn at a time till it runs at idle without holding the gas trigger, be sure you replace the in line fuel filter and fuel line first then clean the air filter before doing any adjustments. most problems are caused by plugged fuel filter due to ethanol in the gas.

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3 Answers

SUNL 50CC SCOOTER


You may need to adjust the fuel/air ratio. There is a small screw under the pull starter facing horizontally (its behind the plastic air filter cover, but accessable) adjust either clockwise or counter clockwise in small increments and give it gas and see if it dies or boggs down. Also check that spark plug is clean and not fouled, and air filter is clean and oiled.

Jul 24, 2008 | Transport Schwinn Rechargeable Portable ...

2 Answers

50cc Sunl gas scooter


You may need to adjust the fuel/air ratio. There is a small screw under the pull starter facing horizontally (its behind the plastic air filter cover, but accessable) adjust either clockwise or counter clockwise in small increments and give it gas and see if it dies or boggs down. Also check that spark plug is clean and not fouled, and air filter is clean and olied.

Jul 06, 2008 | Transport Schwinn Rechargeable Portable ...

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