Question about 2004 Yamaha DT 125 R

1 Answer

Yamaha dt125r sm keeps overheating and cutting the engine off

The engine overheats really easy and fast and then cuts the engine off and takes about 10-15 minutes to cool down before it will start again

Posted by Anonymous on

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1 Answer

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  • Yamaha Master
  • 43,120 Answers

Hi, Anonymous and the usual suspects are:
1. Low coolant level.
2. Restricted radiator air flow.
3. Faulty thermostat.
4. Coolant pump or fans inoperative.
5. Vent hose crimped.
6. Air in the coolant.
For more information about your issue and valuable "FREE" downloads that you will need please visit the websites below. Good luck and have a nice day.
DT 125 overheating
https://yamahaclub.com/forums/topic/19089-dt125r-overheating-and-coolant-problems
http://www.motogelnar.cz/manual/YAMAHA/DT125X_RE-05-Service_Manual.pdf
OEM parts for Yamaha
http://www.dt125.cz/download/Owners_Manual-DT125X_RE.pdf

Posted on Mar 14, 2016

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6 Suggested Answers

6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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johnnygixxer
  • 15 Answers

SOURCE: engine cutting out with the choke off

Adjust your idle screw on your carb so that it gets more gas just sitting there at idle. Tighten the screw one and a quarter turn and then start the bike. Adjust the idle to where you think it sounds normal. If that doesnt work check your float in your float bowl, it might be stuck in the down position. Clean with some carb cleaner spray and make sure it moves freely before putting the float bowl back on, youll have to choke it or prime the carb again to get it started. All the choke does is let in more gas and oxegen so you might want to check how far the carbs close when you push the choke back in. Is it impeading any normal carb setting. Check that too. Good luck.

Posted on Dec 02, 2008

robotek
  • 1512 Answers

SOURCE: My MT-03 engine shuts down while driving and won't start again.

Checking the colour of the plug may tell you what the general state of tune if like for the bike, but the sudden stops sure sounds like ignition system failing. Fuel delivery still there, although it may well be flooding/overfueling for some reason when the problem occurs.  I suppose you have checked the VIN (RM021000000000301 to RM021000000008715)  just to be sure that your bike if not one of those affected by the recall. I would be asking the Yamagents to check for the mods/recall to be sure that whatever the solution is has actually been done to yours. The reference to wet weather would be inclining me to follow that up to the max. Sounds too close to the problem to not be it. 

Posted on Jan 08, 2009

  • 3567 Answers

SOURCE: I HAVE AN OLD YAMAHA SR 125 ITS REVS GO UP AND

Remove the water trap bowl at the bottom of the petcock, (gas valve). Any water or trash in the bowl? Drain a cup of gas from the tank. 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 two screws 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 screws down. Only screw these in until they LIGHTLY seat. Now turn each screw 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. Set the idle speed with the idle screw. This process should get you back on the road.


Since you mentioned uneven idle revs, be sure the carb and manifold are on tight and also tighten the cylinder and head. Air leaks can screw up the idle.

Please rate this solution. Thanks speedfreak41

Posted on Apr 04, 2009

  • 11 Answers

SOURCE: I've got Yamaha Fazer 600. The engine cuts off

MAN ITS A MINOR PROB JST CHANGE THE SPEED OF COMBUSTION IT SHOULD BE 1 MIN AT UR RPM METER IN THE BIKE AND ITS PIN IS NEAR THE CARBURATER JST CHANGE IT AND ENJOY UR RIDE

Posted on Aug 25, 2009

  • 3 Answers

SOURCE: 2000 yamaha ttr90 fuel leaking out overflow tube

your float is stuck take carburator off and clean wiggle float and it shouldnt leak gas anymore

Posted on Aug 27, 2009

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1 Answer

Engine Overheating


no other signs just the dash gauge, upset? what if its fibbing?
no steam, no water to ground overflowing overflow tank.
no engine pinging. no lost power, from engine, SIGNS. are key. here.
Did you consider using a IR pyro gun for $20 and find if it is really overheating,? the gun also finds clogged rad tubes, childs play like.
are you loosing coolant. that is when cold actually off the cap
and look down deep in the RAD tank? This matters, most.

which engine,? 2.5,4L or bigger?
what does no coolant going into...., mean.?
it's a loop system.
first off, we need to know does it overheat only parked?
or can you drive it from cold and keep it going and it never overheats
moving fast.?
if the engine stays cool 180F, moving fast , then your stop. and NOW it it overheats, that means the fan is dead.
or a marginal radiator, (Pyro gun to rescue)

Mar 24, 2014 | 1994 Jeep Grand Cherokee

1 Answer

My yamaha dt125r starts and runs for a few minutes then cuts out and won`t start for ages how do i fix this ???


Check out the coil. When a bad coil heats up it can become open circuit - closing up again as it cools.

Mar 01, 2012 | Motorcycles

1 Answer

I have a 1987 yamaha ,3 cyl 50 hp. just cut right


Check a couple of things.
1. Make sure that the carb is getting fuel.
  • Check the vent on the tank for blockage - look for bug, spider web dirt gunk.
  • Check the output of the fuel pump. It should give you a nice steady stream of gas.
2. Is the engine overheating? When was the last time the water pump impeller was replaced?

Aug 06, 2009 | Boating

1 Answer

Idling the bike,wont hold an idle


It sounds as if you have dirt in your fuel line or some bad gas.
I would recommend draining your tank and cleaning it, then replace your fuel filter.

Dec 03, 2008 | 2002 Yamaha DT 125 R

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2002 Dodge Ram 1500 with a 3.9 engine overheating


Check your rad hoses. They will tend to collapse (**** in) & cut down on flow at highway speeds, more than city, due to increased demand & flow on cooling system. If they don't feel relatively stiff, I'd change them. You might even see them **** in while sitting and revving the engine a bit.

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1 Answer

Keeps overheating


Hi again,

For some unknown reason(s), the Live Session was cut short. Our apologies for any inconvenience.

Perhaps you could try again? The old session/chat would no longer continue.

Cheers.

Aug 01, 2008 | 2004 Jeep Grand Cherokee

1 Answer

Overheating?


yes - it is cutting out on overheat. there are two fans - which one was replaced - cavity fan or casing fan?

possible reasons are:
faulty casing fan
not enough ventilation
faulty overheat stat
faulty fan stat
oven operating stat faulty but you would be burning your cooking in this case

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