Question about 2003 Yamaha TT-R 125

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2003 ttr 125 it will only run when the choke out. idles perfect push in and it dies. is this a air flow problem and is the air screw in the bottom of the carb? I have no manual to check screw settings.

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  • johnseanor Sep 01, 2009

    i have cleaned carburetter now bike will only strart on choke

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Download the repair manual here
http://www.torrentreactor.to/search/haynes+yamaha+ttr+125+repair+manual

Posted on Jul 30, 2009

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1 Answer

Choke problem


That's an indication that the idle mixture is too lean, as the choke richens up the mixture, allowing it to run.

Your carb should be similar to this:

http://www5.picturepush.com/photo/a/3728808/img/3728808.jpg

The AIR SCREW adjusts the mixture (rich/lean), and the IDLE SCREW adjusts the idle SPEED.

Try screwing in the AIR SCREW 1/2 a turn and see if that helps.
If not, try another 1/2 turn.

Still no idle?

Turn the screw back where it was (1 full turn) and then screw it OUT 1/2 turn, then if not, another 1/2 turn.

Once you have the mixture correct, the idle speed can be set with the IDLE SCREW.

Jan 11, 2014 | 2003 ATK 125 4-stroke

1 Answer

Ttr 230 does not start cold


Hi, Johanvn 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.
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.
How to fix my TTR 230 TTR
2006 Yamaha TT R230 cold start issues
Yamaha ttr230 Service Manual
OEM parts for Yamaha
Yamaha ttr230 Service Manual

Dec 11, 2012 | 2008 Yamaha TTR230

1 Answer

2006 ttr 50 dies when giving gas


Hi, Jason 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.
13. Multi carburetors not in sync.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
TTR50 bogs and dies when twisting throttle
http://www.r6messagenet.com/forums/general-motorcycle-talk/93609-bike-idles-but-dies-when-i-give-gas.html
YAMAHA TT R50E Owner Service Manual
OEM parts for Yamaha
Yamaha TT R50E Owner Manual

Nov 15, 2012 | 2003 Yamaha TT-R 125

1 Answer

Gentron 3500.. Starts fine, but idles up and down..runs better when choked or partialy choked..but if I loosen the bottom screw on the collection bowl on the carb it leaks fuel but runs smooth as a k


You've got an air leak somewhere. Running better with the choke closed is the clue. Air is entering somewhere else and by closing the choke you are basically adjusting the air/fuel ratio to be more correct.
With a combustible carb spray and red nozzle pipe, you can lightly spray around the carb as the engine runs and see where the running changes and that's your leak point. Keep the spray away from the carb inlet so you don't get misled.
The carb could also have gunked up gas deposits. Clean the carb also.
Re-check it.

Sep 15, 2017 | Gentron 2800w rated 3500w peak...

1 Answer

2002 yamaha ttr 225 idles high when let off gas but eventually idles down on its own and hard to start when cold with choke or without


Hi, David and the usual suspects are:
1. Throttle cables improperly adjusted, pinched or need lubrication.
2. Idle adjusting screw needs to be backed off.
4. Air fuel mixture adjusted too lean start with 2 full turns.
5. Intake system air leak.
6. Fast idle choke ramp is not releasing.
7. Broken throttle return spring.
8. Damaged diaphragm or slide.
9. Faulty MAP, TPS, ATS, O2, sensors or wiring/connector
10. Multi carburetors not in sync.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links blue below. Good luck and have a wonderful day.
TTR 225 Carb Problems
TTR 125 Idle Issues
http://tjsconcepts.com/ttr225/TTR225_Service_Manual.pdf
OEM parts for Yamaha
http://tjsconcepts.com/ttr225/TTR225_Owner_Manual.pdf

Jun 21, 2011 | 2002 Yamaha TT-R 225

1 Answer

Bike wont kick start or idle , it will coast


first drain the carby, then set your air mixture screw 2 turns out, from the fully turned in position. The starting proceedure is as follows, when the engine is COLD, turn on fuel, pull on the choke fully, and kick the engine over. DO NOT use any throttle, when the engine is cold, and the choke is on. Remember Choke on, NO throttle.
When warm, no choke, and a little throttle when kicking.

May 12, 2010 | 2003 kawasaki KX 125

2 Answers

I recently bought a suzuki rm 125 and it wont run with out me giving it revs y is this . i cant leave it to tick over because wen i let off the throttle the bike dies????


the idle buddy is too low,on the carb is a screw the ide screw turn it in 1/4 of a turn with the bike running untill it idles the way you want it too and it will idle the pic below ill help ya buddy 34c510c.jpg

Sep 22, 2009 | 2003 Suzuki RM 125

2 Answers

This bike is a 2007 and is extremely cold blooded


check for air leak where carb meets intake manifold.air cleaner element must be in good condition and prpoerly seated.

Sep 22, 2009 | Yamaha TT-R 125 L Motorcycles

2 Answers

Yamaha 125 grizzly starts and idles when choked but dies when acc


check that reed valves not sticking and check the pilot jet its prob. half blocked. have to stick a very thin wire through it.

Aug 12, 2009 | 2003 Yamaha YZ 125

6 Answers

Yamaha TTR 125 L won't idle


this is very tipical. when bikes are stored the fuel varishes up the jets & needles. soak the carb. moving it back and forth in the soak solution. then blow every jet and orfice with a controlled air source. note: any speck of rust or dirt can plug these jets. pay attention to detail and do every thing twice. then install the carb and adjust it to your riding style. later Spike

Nov 26, 2008 | 2004 Yamaha TT-R 125 L

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