Question about 2003 Yamaha YZ 125

1 Answer

Not running right stalls almost wants 2ed gear no balls

Need advise

Posted by on


1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert whose answer gotĀ voted for 20 times.


    An expert who has answered 20 questions.

  • Expert
  • 53 Answers

Could be a whole bunch of things. make sure you have a good clean tank of gas, a clean air filter, and a fresh spark plug are just a few basic items that can cause such an issue. i would also suggest buying a spark tester. you just clip it on the engine somewhere and connect the plug wire to it, and when you kick it over you can check the intensity of the spark. also i would remove and clean the carb just too make sure that there is no sludge built up and blocking the jets or keeping the float from sticking up. another thing to check is the compression. you can buy a compression gauge at some auto parts stores, or tool department. the reading should be around 130-150. if you have low compression then you could have bad rings, blown headgasket, bad valves or something else along that line. also remove the exhaust and make sure no critters are stuck up in there because if you cant get proper exhaust flow it wont run properly.

Posted on Jan 13, 2009


1 Suggested Answer

  • 2 Answers

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

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

My 93 Honda accord sometimes runs good then it won't go out of 2ed gear then runs good again,,had trans serviced twice,,is it the brain and where is the brain located? Thank u

This could be a computer problem, it is located under the carpet below the glove box, pull the carpet down from the firewall below the dash. If it will manually shift, but seems to start in 2nd when in drive, it is probably the computer. It can be repaired, there are lots of repair companies on line that do this.

Apr 21, 2015 | 1993 Honda Accord

1 Answer

1990 jeep wrangler 2.5 starts up and will run all day but when driving its starting to stall when in 2-3 gear.. after it stalls its starts right back up n runs fine but still stalls if in gas so much or to...

1990 2.5L 4 banger. (just sold mine a 2002) I have 3.8L now. 2008
what transmission mine was 5speed manual stick , is yours?

ever do the 60,000 mile tune up, all service points under that column?
tune ups do work and have pay back in fuel savings.
" if in gas so much" i cant noodle that.....????
stall when , when you lift throttle and push in clutch.
when it stalls is everything !!
and when, coming to a stop light??????
and last and very important, can a fast right foot save the stall..?
i only have questions, and need all answers above, to proceed.
we can fix it. but i cant drive it and see all this.

Jan 24, 2014 | Jeep Wrangler Cars & Trucks

1 Answer

Honda civic wont move when in gear but speedometer move when reved up also found 4 balls under car

my guess> ??????
engine starts runs perfect, right
but the all gears in the tranny are dead, car will not move.
so you see ball bearings under car.
CV joint failure, I bet you ignored the noises for a long time.

Sep 27, 2013 | Honda Civic Cars & Trucks

1 Answer

2000 nissan sentra gxe code output speed sensor

It sounds like the transmission is slipping and the sensor is just reporting this info and setting a code, you have made a common mistake. You likely need a transmission overhaul

Oct 05, 2012 | 2000 Nissan Sentra

1 Answer

1968 FR100 pickup stuck in 2ed gear 3 speed manual aqny ideas besides replacing it ?

The pressure plate needs to be replaced...when working this allows the clutch to disengage, so you can manually change gears...Hope this helps.

Jul 06, 2012 | Ford Cars & Trucks

1 Answer

Hi, My name is Jun and I have a 1994 toyota p.u. 22re that suddenly stalls and can't get it to run. I replaced the fuel filter and got it started for a minute then stalled again. Sometimes I have to...

Did this start all of a sudden ? after buying gas? If you are right about not getting enough gas ... perhaps you bought some REALLY dirty fuel. My '94 has a drain plug on the gas tank ... you might open that up and see if you get any gunk/water out of the bottom of the tank. After that check fuel pressure and those sorts of things.

Aug 08, 2011 | 1994 Toyota Pickup

1 Answer


You are probably going to need a syncro on third gear, trans has to come out and be taken apart.

Apr 16, 2010 | 1999 Honda Civic

1 Answer

Our playskool train will not move forward please could you advise me how to solve this - thanks dee

Had the same problem - the train at first stopped moving, but still rotated the balls, then later stopped rotating the balls at all. The music still played, though. I found the issue to be a small belt that transfers the motion from the electric motor to the gear system. The belt is tiny (think small rubber band) and lost tension, finally detaching from the system altogether. Getting to it is the difficult part... mind you that taking it apart carries a very high risk of breaking the plastic, so be prepared to scrap the whole thing and buy new.
To fix, start by removing the 7 outside screws to essentially split the train body in half. You'll have to pry off the large green wheel that's opposite the screws (right side of train) - this part carries the highest break risk. Be mindful of a spring (about 1/2 inch diameter) that may go flying - that one goes on the outside of the little inside wheel that moves the balls around.
Once the train is split in half, remove all screws you find, which will allow you to remove the mechanical sections, which includes the battery pack, electric motor, on/off switch, and gear system, including the wheel that moves the balls around. By the time this entire section is lifted off the train body, you'll see where the gears (they're a bit greasy) are attached to the motor towards the bottom of the gearbox. The gearbox itself has 3 or 4 screws to address that will reveal the entire gear system.
I had to take the lower (smaller) gears apart in order to replace the gear belt.
Replace the gear belt with a small rubber band (you'll likely need a small screwdriver to wrap it around the wheels), then re-assemble the gearbox and system. i recommend constantly running the toy with every step to make sure everything's still connected.
with a healthy rubber band/belt in place, the rest of the gear systems will fall into place with enough torque to drive both the train movement and the ball wheel.
good luck

Dec 22, 2009 | Playskool Busy Basics: Busy Ball Choo Choo

2 Answers

Stall in my tranmission 1993 crown victoria

i take it that this vehicle has an Automatic transmission, if Yes then service it, there is a filter inside right at the bottom and it is blocked because it hasn't been changed for a long time

Nov 21, 2008 | 1992 Ford Crown Victoria

Not finding what you are looking for?
2003 Yamaha YZ 125 Logo

Related Topics:

94 people viewed this question

Ask a Question

Usually answered in minutes!

Top Yamaha Experts


Level 2 Expert

281 Answers


Level 3 Expert

1169 Answers

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1147 Answers

Are you a Yamaha Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides