Question about 2000 Yamaha DT 125 R

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Weak spark on dtr125 - 2000 Yamaha DT 125 R

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Hi, Anonymous and the usual suspects are:
1. Fouled spark plugs.
2. Discharged battery, check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
3. Loose connection at ignition coil or plug between ignition sensor and module.
4. Spark plug cables in bad condition, shorting / leaking, spark plug cable connections loose.
5. Faulty ignition coil or ignition / electronic module
6. Failed CKP, CMP, or BAS sensor.
7. Faulty ignition switch.
8. Security alarm failing to disarm needs reset
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.
https://answers.yahoo.com/question/index?qid=20140105115538AAeGNCO
Help fix my Honda please
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 10, 2016

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Hi, I do a lot with these bikes, I think if you are getting a weak spark there is a couple things to check. First, do you understand how it builds the power to create the spark? The magnet in the flywheel has to be very close to the magnito or coil, if the gap is too much it will cause a weak spark, if the magnet is weak, weak spark, if the coil is shorting internally, weak spark. If the plug wire is damaged, weak spark. I hope this helps you.

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I have a dtr and when put to work after a while shut up. what can it be?


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Sep 04, 2014 | Yamaha DT 125 R Motorcycles

1 Answer

My dtr has no spark and power valve has stoped working


Hi, Anonymous and the usual suspects are:
1. Fouled spark plugs.
2. Discharged battery, check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
3. Loose connection at ignition coil or plug between ignition sensor and module.
4. Spark plug cables in bad condition, shorting / leaking, spark plug cable connections loose.
5. Faulty ignition coil or ignition / electronic module
6. Failed CKP, CMP, or BAS sensor.
7. Faulty ignition switch.
8. Security alarm failing to disarm needs reset
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 no spark
https://yamahaclub.com/forums/topic/30870-yamaha-dtr125-no-spar
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

Feb 23, 2014 | Yamaha DT 125 R Motorcycles

1 Answer

Weak spark


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1 Answer

My 1975 Yamaha DT 125 won't get spark, I put in a new plug and battery, where do I go next?


Hi, Anonymous and the usual suspects are:
1. Fouled spark plugs.
2. Discharged battery, check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
3. Loose connection at ignition coil or plug between ignition sensor and module.
4. Spark plug cables in bad condition, shorting / leaking, spark plug cable connections loose.
5. Faulty ignition coil or ignition / electronic module
6. Failed CKP, CMP, or BAS sensor.
7. Faulty ignition switch.
8. Security alarm failing to disarm needs reset
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 no spark
https://yamahaclub.com/forums/topic/30870-yamaha-dtr125-no-spark
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

Nov 20, 2013 | 2000 Yamaha DT 125 R

1 Answer

My yamaha dt 125 has no electric to spark?


Hi, Anonymous and the usual suspects are:
1. Fouled spark plugs.
2. Discharged battery, check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
3. Loose connection at ignition coil or plug between ignition sensor and module.
4. Spark plug cables in bad condition, shorting / leaking, spark plug cable connections loose.
5. Faulty ignition coil or ignition / electronic module
6. Failed CKP, CMP, or BAS sensor.
7. Faulty ignition switch.
8. Security alarm failing to disarm needs reset
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.
https://yamahaclub.com/forums/topic/30870-yamaha-dtr125-no-spar
How to diagnose no spark situation on motorcycle
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

Jan 03, 2013 | 2004 Yamaha DT 125 R

1 Answer

Yamaha dtr125 misfire at high revs


Hi, Namesjames00 and the usual suspects are:
1. Spark plugs in bad condition or partially fouled.
2. Spark plug cables in bad condition and leaking.
3. Spark plug gap too close or too wide.
4. Faulty ignition coil, module, and or sensor.
5. Battery nearly discharged.
6. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
7. Intake air leak.
8. Water, dirt, or rust in the fuel system, carburetor and/or filter.
9. Fuel tank vent system plugged or carburetor vent line closed off.
10. Carburetor controls misadjusted.
11. Damaged carburetor.
12. Loose, dirty, or corroded ignition module connector at crankcase.
13. Faulty MAP, CKP, O2, and/or CMP sensors.
14. Incorrect valve timing.
15. Weak or broken valve springs.
16. Damaged intake or exhaust valve.
For more information about your issue and valuable "FREE" downloads that you will need please visit the websites below. Good luck and have nice a day.
Yamaha DT125R engine problems
dt125r keeps missing at high revs
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

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1 Answer

1986 gas club car weak spark replaced coil still same


How do you know that the spark is weak?
Replace spark plug.
Check spark plug wire for leaks.
Replace fuel.
Clean points and reset.
If there is a battery check that it is at 12.5 during starting.

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Back on my bike


yer change ya gear box oil and get all the old fuel out. just basicly anything you can clean or change do it!!! air filter,oil filter,water,spark plug and so on...and when you first start it let it warm up for bout 5 mins but no longer.

Jul 05, 2009 | 2002 Yamaha DT 125 R

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