Question about 2001 Yamaha TDR 125

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Yamaha tdr 125 1997 not sparking constantly

When i spin my engine over on the electric start,it does not spark constantly,as i let my finger off the start button it gives 1 or 2 bright sparks.the bike does not start.any ideas,i have cleaned all electric contacts.and dont fancy paying for a cdi if it not required.

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  • Yamaha Master
  • 4,514 Answers

Think you have a timing problem some may have screwed with the valve sproket on top of cylinder-its connected by chain to the crank where the alternator is they have to be geometrically alined{timing marks} you can do it your self with a cycle manual from bookstore or library. youll also learn to electrically test components-learn some japonese

Posted on Jul 30, 2009

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Posted on Jan 02, 2017

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In the biginig it wos overheating blow pisten, put new pisten in ect naw theres no spark


to make sure it dont overheat again a good head gasket,,and for the spark check your wiring,,,

Dec 17, 2010 | 2000 Yamaha TDR 125

2 Answers

My tdr 125 has 30 psi compression measured on cold engine with carb. removed. It won't start at all. It has very good spark and fuel. thx


30 PSI IS NOT GOOD AT ALL. YOU NEED TO DO A LEAK DOWN TEST ON THE MACHINE TO DETERMINE WHERE YOU ARE LOSING COMPRESSION. IT COULD BE AS EASY AS A VALVE ADJUSTMENT OR IT COULD BE A BAD RING. YOU WILL BE ABLE TO HEAR WHERE THE LEAK IS BY LISTENING TO THE EXHAUST, CARB AND REMOVE THE OIL FILL PLUG AND YOU CAN FEEL THE AIR LEAKING . THE CARB OR EXHAUST IS MORE THAN LIKELY A VALVE PROBLEM POSSIBLY JUST ADJUSTMENT,. AIR FROM CRANKCASE IS RINGS.

Nov 03, 2010 | 2000 Yamaha TDR 125

1 Answer

I have a yamaha tdr 125 ( 2007 ) gwtting a clicking sound when the ignition button is pressed then engine eventually starts to turn over.... problem is getting worse


startermotor is on its way out my tdr was the same till it stopped and its the stater moter i ve had it rebuilt and its great now

Oct 13, 2010 | 2003 Yamaha TDR 125

1 Answer

2002 TDR 125: excessive white smoke from exhaust driving at 65 k...


Hi, Anonymous your instrument gauges and lights can alert you to most electrical and engine issues they can not warn you about failed engine gaskets or seals so your engine has to resort to old fashion alert methods of colored "SMOKE SIGNALS" here is a breakdown of their meaning:
1. WHITE SMOKE on start-up can is usually caused by a blown head gasket allowing coolant to enter the combustion chamber and may start dripping out of the exhaust pipes or mufflers.
2. BLUE SMOKE on start-up is usually caused by failed valve seals. Smoke that is constant while riding is usually caused by valve to guide and piston ring clearances that have exceeded service wear limits.
3. BLACK SMOKE on start-up is usually caused by too much fuel in the combustion chamber this can be due to air/fuel mixture adjustment too rich, accelerator pump improperly adjusted, faulty choke/enrichner or not in the off position, faulty carburetor float needle and seat, pilot jet too large, fuel injectors leaking, smoke while riding is usually caused by the main jet being too large.
It should be noted that aggressive or abnormal throttle operation will cause these conditions to manifest themselves exponentially.
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.
Dirt Rider Magazine
Dirt Rider Magazine
http://www.yamaha-motor.com/assets/service/manuals/2007/LIT-11626-20-01_ttr125all_1961.pdf
OEM parts for Yamaha
YAMAHA TDR125 Owner Manual

May 16, 2010 | 2002 Yamaha TDR 125

1 Answer

Died While drivng


Check for spark first. If spark is there, chances are the carb has filled with water that has accumulated from condensation in the gas tank. Drain the carb, stick in a fresh spark plug and then give it a try. Please rate my answer. Thanks.

Feb 15, 2010 | 2002 Yamaha TDR 125

1 Answer

Engine will not start


You'll need fuel, air, compression and spark at the right time. Your not getting one of these.

Oct 01, 2009 | 2000 Yamaha TDR 125

1 Answer

Same problem o6 Raptor 80 will not start


Get a compression tester to see if she has plenty of compression or take spark plug out ,put your finger over plug hole and turn engine over. you should feel a pressure forcing your finger away.

Jul 27, 2009 | 2003 Yamaha WR 450 F

1 Answer

I have a tdr125 (03) and it wont start the starting motor turns over but it jus wont catch can anyone help


If the engine won't fire so to speak, it is either fuel starvation or an electrical problem stopping the spark plug from igniting the fuel.
If investigating these is beyon your knowledge base, you will need to take your bike to a motor bike repair shop.

Graham (TDR Fan)

Jul 12, 2009 | 2000 Yamaha TDR 125

3 Answers

Yamaha warrior won't start


If you are getting a nice bright blue spark then no, the last time I had a problem like this it was sugar in my tank. If you taste a bit off your finger and it is the slightest bit sweet, then some one has sugared your tank. If so just flush the tank with a little fresh fuel and then flush the carb, and fuel lines by spinning the engine over for a bit then try to start again.
Is yours an electronic ignition or points. If points gap could be wrong or even timing slipped. That has happened to me also.

Apr 29, 2009 | 2003 Yamaha YZ 125

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