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Coil resistance on ktm 620 1998 motorcycle - Motorcycles

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Most bike coils are about 100 ohms. Any less and it has failed. If it is near infinity it has also failed.

Posted on Dec 28, 2013

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KTM Lc4 640 2004 No spark fitted a new coil still no spark tested pulsar coil got 108 ohm's getting power to CDI tested blue and white wire to coil what els is there I can do


Hi, Anthony 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, igniter, 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.ktmforums.com/forums/supermoto/2549-ktm-640-supermoto-spark-problem-please-help.html
KTM LC4 640 SM Lost Spark
1998 2005 KTM 400 660 LC4 Enduro Service Manual Moto Data Project
http://sparepartsfinder.ktm.com/
KTM 640 LC4 Owner Manual

Nov 08, 2016 | KTM Motorcycles

1 Answer

Have a 2011 50sx ktm no spark getting to plug ,plenty power out of maggy to coil have put new coil and lead ,new plug but still no spark with the kill switch unplugged


Hi, Chris 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 module.
5. Spark plug cables in bad condition, shorting / leaking, spark plug cable connections loose.
6. Faulty ignition coil or electronic control module or CDI box.
7. Faulty CKP, CMP, or BAS sensor.
8. Faulty ignition switch.
9. Tilt sensor needs a reset.
10. Security alarm failing to disarm needs reset
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.
KTM 50 No Spark Mini Pe Wee
Dirt Rider Magazine
Motorcycle Message Board Motorcycle USA
http://www.ktm.com/globalassets/product-manuals-pim-data/dok_bike_bed_11_3211593_en_om__sen__aepi__v1.pdf
https://www.tradebit.com/filedetail.php/275115445-2009-ktm-motorcycle-50-sx50-sx-junior50

Jun 23, 2016 | KTM Motorcycles

1 Answer

What is the diffrint coloured spings mean on a ktm sx250


Different colored springs usually indicate that they provide a different pressure resistance.

Oct 11, 2013 | Saddlemen Standard Adventure Track...

1 Answer

Hi i have a ktm 590 1996 model it has some spark but it is only just there just wanderin wat the problem is


Assuming the plug is OK, I would check the voltage on the coil, (12Volts) and the capacitor across the points. Then if they are OK the coil.

Mar 10, 2011 | KTM 690 Enduro Motorcycles

1 Answer

89 ktm 350 got no spark and cant get a coil n lead in aust


Hi, you should be able to transplant any similar coil, as long as it's the same voltage, and same amount of wires, your local motorcycle wreckers should be able to match one up for you if you take yours as a sample, hope this helps

Dec 28, 2009 | 2000 KTM EXC 380

1 Answer

I have a 2007 KTM 450sxf after i ride it it dies within a minute


I'd start with simple things like checking the plug and doing a few electrical tests.Some tests you may be able to do yourself like resistance checks.Compare the following spec with what you get ; Primary coil . 25~35 0hms Secondary 5050~7550 Valve clearance inlet 0.10~0.15 exuast 0.15~0.20 both cold and in mm.

Nov 27, 2009 | 2008 KTM 250 SX-F

1 Answer

2005 ktm 450 sx die while riding.


yes, you are correct, those are the two pieces that could solve your problem, but i would go first for your cdi, you may choose to have it tested first also, before you jump out to buy a new one.

Nov 24, 2008 | 2005 KTM SX 450 racing

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