Question about 1972 Honda CB 350 F0

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No spark checked points they have spark how do I check coil assy. or change wire to spark plug a OEM ignition coil is spendy

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If the points are working correctly you are having a problem with the condenser ,coils,spark plugs,or spark plug caps. Honda condensers are notorious for being week. Spark plug caps have resisters that burn out or corrode. Coils can go bad but do not usually go out in pairs. Plug wires can short out the spark if the are old and cracked or wet. One coil does two plugs so on shorting wire on each coil will kill all the spark.You can see this if the bike is running at night where it is dark. Aftermarket Accel coils($150-$200) might be a good option along with an after market CDI ignition (may still be available through Parts Unlimited about $200). I suspect that your problem is still the points. Power is going to them but not leaving them. Even new points may have to be reinstalled several times before they decide not to short to ground.

Posted on Aug 25, 2010

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Posted on Jan 02, 2017

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1 Answer

No spark from coil to distrubuter


Disconnect the ignition coil output wire at the distributor cap.
Connect a spark plug to the end of the ignition coil output wire which you just disconnected.
Connect a ground wire to the threaded portion of the spark plug.
Disconnect the ignition coil ground wire from the negative terminal on the coil (Green Wire).
Connect one end of a ground wire to the ignition coil negative terminal.
Turn the ignition switch to the ON position.
Tap the other end of the ignition coil ground wire jumper on an good grounding point (for example the battery negative terminal) and look for sparks at the spark plug that correspond to the frequency of your tapping of the ground wire.
If you have a good spark at the spark plug, the ignition coil is good.
If you don't get a good spark, check for approximately 12 VDC from the coil positive terminal (black wire) to ground with the ignition switch in the ON position. You should also get approximately 12 VDC from the coil negative terminal (Green wire) to ground
Ignition Coil Resistance Check

In addition to the test above, you may elect to perform an ignition coil resistance check as confirmation of the coil's condition.

Check the ignition coil primary coil resistance by connecting an ohmmeter between the positive (Black wire) and negative (Green wire) terminals on the coil. The resistance should be 0.4 to 0.6 ohms.
Check the ignition coil secondary coil resistance by connecting an ohmmeter between the coil output terminal and the ignition coil negative terminal. The resistance should be 5000 to 7200 ohms.

You may have a bad coil or bad ground or wire connection

Jan 23, 2017 | Cars & Trucks

1 Answer

No spark on kawazaki kl250 a3 1980 model


Sounds like all there is left is the plug wire from the coil - but it's probably a single unit - coil and wire w/ plug boot.
All that comes to mind is grounding. With a VOM make sure you have a ground. Also look further up the chain - follow the wiring the CDI unit plugs into for breaks. Headlight gets brighter when kicked over ? Follow the wiring to it's termination points, loose plugs etc.

Single cylinder engines vibrate an awful lot, with that in mind look things over. There is a chance the no spark condition is a product of an unrelated failure - ignition system could be fine. Check the stator coil for an open circuit where it should be closed.

Besides checking wire and plug condition, cleaning and tightening grounds. The stator is the first place I'd check.
Be careful and gentle, the coil wires are very fine and as such break easy. A shorted winding will show continuity but not generate power, a web search should give resistance ranges of the coil assy.
Too low fail/Too high fail ranges.

My brain is picked out....Hope it helps you.

Sep 02, 2014 | Motorcycles

1 Answer

Ignition coil wire diagram


Hi, Anonymous if you have a CKP sensor it needs compression to send the correct signal to the ICM/ECM, make sure both spark plugs are in heads and use a grounded third plug to check for spark or hold spark plug cable close to spark plug in the head. If still not getting spark 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, please visit the websites below. Good luck and have a nice day.
1986 K75 Has No Spark BMW com
Damn bike won start BMW K75 K100 K1 K1100
https://www.tradebit.com/filesharing.php/search/0/1986+bmw+k75c
BMW Motorcycle Parts Fiche OEM BMW Motorcycle Parts online 1970 present BMW
http://www.bmw-motorrad.com/us/en/index.html?content=http://www.bmw-motorrad.com/us/en/services/manuals/manuals_main.html¬rack=1

Sep 20, 2013 | BMW Motorcycles

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.
have no spark
no spark help
Yamaha TW200 Service Manual
OEM parts for Yamaha
YAMAHA TW200E Owner Manual

Sep 02, 2013 | Yamaha TW 200 Motorcycles

2 Answers

Cant get a spark


The only other thing you have to look is how the coil is charged up. Is the battery good? Is there 12v on the power side of the coil? Is the coil grounded? Are points or electronic ignition time in use? If mechanical points are in use then there is a capacitor near the points that can go bad. If there are points in use, do they open and close properly when the engine is turning over? Is the gap correct for the points? If this is an electronic controlled timing system, then check the cam or crank sensor for function and gap. That is checked with a volt ohm meter. I'm unfamiliar with your particular bike so I apologize that I can't be more specific.

Aug 03, 2012 | 2000 Honda CM 125 C

1 Answer

Engine is turning over,but not starting


first, test for spark at the ignition coil. take the power cable that connects from the ignition coil and disconnect the end at the distributor. hold the bare connecting end a fraction of an inch away from a metal paqrt of the cars frame and attempt to start. if the ignition coil is good, it should throw a spark. if the ignition coil sparks, next check your spark plugs for oil, grime, black or white discoloration on the spark tips (that point inside the engine). if there is a lot of build up or discoloration, replace the spark plugs. if this does not solve it, change your distributor cap, and if this doesnt slove it, change your spark plug wires.

Mar 13, 2011 | 2008 BMW 5 Series

2 Answers

Low or no spark at spark plug on 4x4 atv changed plug wire and no differance. stan



Here are several ways to troubleshoot.
1. Check the ignition coil.
2. Check or replace CDI.( If in case it is a CDI operated )
3. If it is still Contact point:check the timing.The contact point, Or replace the condenser
4. Or,Check your Ignition switch because it might be losen and is grounded to the body or chasis.

Nov 05, 2009 | 1989 kawasaki ZXR 400

3 Answers

Engine stop


If theres no spark from the spark plugs then you would have to replace them?

Jul 12, 2008 | 1993 Toyota Corolla

2 Answers

'96 Jetta,2.0l, hard and no start


Replace thye Ignition Switch.;

Jul 07, 2008 | 1996 Volkswagen Jetta

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