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Is this the coil for my 1971 250 yamaha?? What is the black chip? Will this stop plug from sparking?

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Without a wiring diagram for you bike we all will just guessing what that is but. it mite be a fuse link. if you are not sure. see if any type of markings, part#######, and go to www.ask.com/ or
www.wiki.org/ or www.infolinks.com/
/what is this device and put the numbers [enter]
it looks like a fuse link, remove any hot wires and test it with ohms meter, if it pegs out or the needle moves, than it okay, if the needle doesnt move than open, or burned out., i would check with the yamaha shop, bap auto part, or foreign auto parts store, or NAPA auto parts store. you see that red round piece is the coil, you have to remove the hot wire and test with ohms meter too.
www.youtube.com/how_to_test_coil/
/how to test fuse link with ohms meter/
/how to test coil under normal use/
/how to adjust points and condenser/

Posted on Apr 22, 2015

5 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 3567 Answers

SOURCE: yamaha big bear no spark

I'm not familiar with all quads and all the kill switch locations. Does it have a tip-over kill switch? Is it working? Is the quad in neutral? Is the neutral light on? Many engines will not spark if the neutral light is not on. Are the headlights off when starting?

How good is your battery? A low battery can kill spark. Test for spark by grounding the threads of the plug against the cylinder. Have a friend kick the bike while you watch for spark. Assuming no spark, then check all the kill switches with an Ohmmeter to be sure each switch is working properly. Sometimes a switch goes bad. Try disconnecting all kill switches then check spark.

Check the wiring harness, even under the gas tank and seat. Are all the connectors clean and with a tight connection? Any abraded wires? Check the ignition switch also. The switch can go bad as well. Are the flywheel coils good > is the battery getting a charge?

Still no spark? If CDI then get it checked.
If points then file or replace them along with a new condensor and reset the gap then time the engine. >> I hope this helps.

Please rate this answer. Thanks trsrhntr!

Posted on Apr 03, 2009

jimmy nutron
  • 132 Answers

SOURCE: my yamaha xs 1100 wont spark

see if the coil packs have power

Posted on Jul 23, 2009

tunde007
  • 2382 Answers

SOURCE: I have a 99 yamaha

Hi, add a new ground wire and ground it to the MOTOR very important. Just take any ground wire you have and ground it to the motor.. Once that is done check agian for spark. If still no spark. Make sure the cdi box is pluged in all the way and coil leads... There is only a few things that make it stop sparking.. Stator pick up coil ground wire cdi box then coil...
Check the leads and coils.. also cables from the coils to the ignition system..

Posted on May 08, 2011

  • 1 Answer

SOURCE: A 2000 yamaha grizzly 600

i was working on a 400 kodiak and found that the wire bundle under the battery bracket was chaffed and shorting out and blowing fuses and running battery down the wire went to my cdi

Posted on Sep 13, 2011

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1 Answer

My Yamaha tw 200 only gets 2 sparks then stops and will not start why won't it start


Hi, Michael 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.
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Hi, Anonymous and the usual suspects are:
1. Fouled spark plugs.
2. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
3. 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.
4. Loose connection at ignition coil or plug between ignition sensor and CDI box.
5. Spark plug cables in bad condition, shorting / leaking, spark plug cable connections loose, check for spark leakage in the dark.
6. Faulty ignition coil, pick up coil, trigger coil or CDI box testing needs to be checked with an ohmmeter at 70 degrees Fahrenheit
7. Faulty safety switches clutch, kickstand, neutral, off/on etc.
8. Faulty ignition switch.
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.
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1 Answer

1987 yamaha tw200- no spark at spark plug. ignition coil changed. pickup coil wires show grounded at both, even with engine shutoff switch disconnected. there is no kick stand switch.


Hi, Edward and the usual suspects are:
1. Fouled spark plugs.
2. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
3. 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.
4. Loose connection at ignition coil or plug between ignition sensor and CDI box.
5. Spark plug cables in bad condition, shorting / leaking, spark plug cable connections loose, check for spark leakage in the dark.
6. Faulty ignition coil, pick up coil, trigger coil or CDI box testing needs to be checked with an ohmmeter at 70 degrees Fahrenheit
7. Faulty safety switches clutch, kickstand, neutral, off/on etc.
8. Faulty ignition switch.
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.
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1 Answer

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Hi, Anonymous and the usual suspects are:
1. Fouled spark plugs.
2. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
3. 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.
4. Loose connection at ignition coil or plug between ignition sensor and CDI box.
5. Spark plug cables in bad condition, shorting / leaking, spark plug cable connections loose, check for spark leakage in the dark.
6. Faulty ignition coil, pick up coil, trigger coil or CDI box testing needs to be checked with an ohmmeter at 70 degrees Fahrenheit
7. Faulty safety switches clutch, kickstand, neutral, off/on etc.
8. Faulty ignition switch.
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.
http://www.r6-forum.com/forums/57-garage-mechanical-help/160041-no-spark.html
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Hi, Anonymous all this electronic brain surgery is above my pay grade Good luck and have a wonderful day.

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Hi, Anonymous and the usual suspects are:
1. Fouled spark plugs.
2. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
3. 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.
4. Loose connection at ignition coil or plug between ignition sensor and CDI box.
5. Spark plug cables in bad condition, shorting / leaking, spark plug cable connections loose, check for spark leakage in the dark.
6. Faulty ignition coil, pick up coil, trigger coil or CDI box testing needs to be checked with an ohmmeter at 70 degrees Fahrenheit
7. Faulty safety switches clutch, kickstand, neutral, off/on etc.
8. Faulty ignition switch.
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.
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I am hookin up the pots stright up to the coil


If your bike has points in it, your are correct. There is usually a black wire that goes from the points directly to the coil. When the points open, this breaks the circuit and the current through the coil stops. This, in conjunction with the action of the condensor, collapses the magnetic field in the coil's primary circuit wiring. The collapsing magnetic causes and induced high voltage low amperage current in the coils secondary circuit. This the high voltage that produces the spark at the spark plug.

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