Question about Yamaha TT-R 125 Motorcycles

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My ttr 125 will start and idle with the chock on, but as soon as I shut off the chock it dies. It will also run if I set the idle set screw all the way up, but only for a short period of time. Could it be the jetting?

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The jetting is fine as is. The carb just needs to be cleaned. The pilot jet especially and the related circuit as well. Go to the website below and you can see an exploded view of your carb. Please rate my answer. Thanks.
www.babbittsonline.com/pages/parts/viewbybrand/default.aspx

Posted on Sep 04, 2010

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Posted on Jan 02, 2017

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Yamaha AG 200 1970


bad electrics maybe? how good does it idle? you clip on you cut off valve / slide in your carb may have the clip set one or two notches too low. or it could be a blown crank seal, does it smoke badly?

Aug 23, 2015 | 2007 Yamaha TTR 125 LE

1 Answer

07 ttr 125 cranks but will not start right up when it does it will not take gas it dies and you have to turn key off and back on before it will start back it will idle for a few seconds and die again over...


I have two ttr 125's and my son has another, all 05's but i ran into this with a friends 02 as well. All ttr 125's are cold blooded bikes to say the least. the cold starting procedure that works is to first lean the bike over to the left till it dribbles a little gas on the floor. hit the electric start for a few seconds only, wait 20 to 30 seconds and do it again. holding the starter button down and cranking will do nothing but flood the bike out. short busts only, dont give it any gas ever, this will also do nothing. first it will start for a brief moment then die, hit the button for about 3 to 4 revelutions and wait, the next time it will start again, most likely only for a few seconds again, repeat this and each time it will run a little longer till it keeps running on it own. the best way to get your ttr to start easier is to cut the top of the airbox off, this will give the bike more power (youll see why when you look at the tiny opening) and allow you to spray starting fluid under the back of the seat right into the airbox. it makes starting a cold bike 5 times faster. usually only 2 repeats of the starting procedure.

Feb 22, 2011 | 2002 Yamaha TT-R 125 L

1 Answer

Idle problems


the idle set screw located left side center of the carburetor brass slotted screw

Jun 02, 2010 | 2002 Yamaha TT-R 125

2 Answers

Yamaha ttr 90 jet pilot should it be open end to


The pilot should be open. This is to say that if you look through it at a light you should be able to see through it.
I suggest blowing it out with compressed air as well as the hole it fits in. While your at it give all the jets a blow out.
once you've put it back together I also suggest you fit an in-line fuel filter.
This will help to keep the dirt out and save you having ths same problem again
Hope this helps
Regards Andrew Porrelli

Dec 08, 2009 | 2004 Yamaha TT-R 125 E

1 Answer

How do I adjust my carb on 2005 ttr 125


First of all, assuming that the float level is correctly set, while running the engine at idle, turn the idle adjust screw in until it starts to get rough(pay close attention). Then back the screw out 1/8- 1/4 turn. If the screw has been removed, always start by tightening the screw all the way in and then back it out 2 1/2 turns.

Dec 02, 2009 | 2005 Yamaha TT-R 125 L

1 Answer

2007 ttr 125 wont start unless hand is over the back of carb. also wont idle.At mid and high range it runs fine. There are no air leaks and no adjustment screw for the air/idle just a factory plug.


Time for carb cleaning, blow the jets with compressed air and check the fuel level in the float chamber, adjust if necessary.
Tht factory plug is where the air-mixture screw is and tht plug has been kept there for non tampering!
That screw is factory set.
Basically its the primary jet which is a problem in your bike's carb, but all in all might as well blow both of them.
Hope this helps!

Nov 13, 2009 | 2002 Yamaha TT-R 125 L

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

1 Answer

Ttr 90 after 1/4 throttle just dies out


Remove the water trap bowl at the bottom of the petcock, (gas valve). Is there any water or trash in the bowl? Drain a cup of gas from the tank. Is there any water or trash in the cup? Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ).

Drain the carburetor. There should be a screw on the lower side of the carb float bowl. Remove the screw then replace it after the fuel drains. Turn the gas back on and wait a minute for the carb to fill with gas. Install a new stock NGK spark plug and try to start the engine. If the bike doesn't start and run properly then shut off the gas and remove the carburetor from the engine.

Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb. Remove the idle screw and the air screw on the outside throat of the
carb and spray into the screw holes as well.
< < READ CLOSELY > >
Be sure to put these two screws back in the same hole they came out of. 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. Put the rest of the
carb back together, clean the air filter and install the carb. Let the float bowl fill then start the engine. This process should get you back on the road.

If the above does not solve the problem then pull the slide out of the throat of the carb and move the clip on the jet needle one notch lower.

Please rate this solution. Thanks!

May 02, 2009 | 2002 Yamaha TT-R 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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