what do i do my engine my engine died while driving?

[determined]

My engine had less than twenty miles on it when it died as i was cruising around the block at about half throttle .i checked all the connections and they look good but it wont start now .im convinced its not getting spark but dont know what do do first to fix it. Also it got rained on slightly but still ran good after that .i did notice gas on the spark plug seeping through the porcelin .but thats never been a problem before .can someone advise me where to start? Im new to this hobby.

 

[ua2pants]

I actually just had this problem today as well. The steps I took to figure out what the culprit was are as follows.

Check to see if a different plug will start the engine.
Try a different plug cable and boot.
Test your CDI with a multi-meter (Red probe to blue wire, Black probe to Black) and you should get roughly 350 +/- 50 Ohms of resistance).
Test your stator coil with multi-meter (Red to Blue, Black to black) and you should get roughly 7-8 Ohms.
If all of that has been done and checks out, It's possible that your magneto may be weak, or that it has "jumped" and rotated on the shaft.
That would cause the timing to be way off and would spark at the bottom of TDC (top dead center, or when the piston is at its highest point).

Check all of these things and then get back to me.

If all of that is good, check for leaks (head gasket, base gasket, case gasket, etc.)

What color is your plug?

Clog in the carb? (i know you said there is gas coming from around the plug but it may not be enough to fire)

 

[ua2pants]

Forgot to mention, make sure that if you're using your white wire from the coil, that it isn't using to much power as it can cause extreme theft of spark.
If you aren't using the white wire, make sure it isn't touching any metal part of the bike, as it will cause a short like pushing the kill switch.

If you have your kill switch hooked up, push the button a few times as these switches are known to sometimes stick.

Try disconnecting your kill switch entirely, if the bike starts, to shut it off, just stall the motor from a dead stop. (just release the clutch).

 

[determined]

great info ! I sure do appreciate all the direction ill get busy as soon as possible and get back to ya

 

[determined]

well I tested like you said and got nothing on the magneto wires and nothing on the cdi. hopefully I am using my new mm right I set it on ohms and have then plugged into the proper ports but the only way I got any kind of reading is when I touched both red and black probes to a single wire what do I do next?

 

[ua2pants]

Okay, you want to make sure the settings on your mm are set to ohms without a "K" next to it, as that would be set to thousands of ohms. Once it's set correctly, you can hook the red up to blue, and black to black. If you aren't getting a reading then the coil is shot and needs replaced unfortunately.

Make sure that the black wire coming from the engine (where it is screwed in to the coil) didn't come loose. See if you can tighten it and check again. If you still aren't getting a reading, it's burnt out.

P.s.-you don't have to pedal the bike or anything, just touch the leads to the wires.

The good news is that you can get a replacement pretty cheap!!

I'm in the same boat as you, I need to replace my coil although it's not even 2 months old.

What I've come to realize is the spark plug gap has a lot to do with these cheap coils burning up. The larger the gap, the harder the coils has to work to make a strong enough spark to jump it.

For future reference, I ruin my gap at .015 and it ran great, but I think my coil was defective (cheaply made, poor QC)

Best of luck though!!!

 

[determined]

Thank you for the help .can you tell me a good source for cdi's and magneto's? And one more quick question. Do you mean i should set my gap at .015 or that .015 ruined yours im a little confused on the proper gap but what you said about the gap being to big made a lot of sense because i set it pretty big prior to the dead everything .i also was ridding it pretty fast justbprior to it dying on me

 

[ua2pants]

It's not a problem. We all start as a beginner.

As for a good place for everything, if you want the generic stuff, eBay is a great source. I wouldn't get a cdi just yet, as I'm sure it's still good. However, the stock cdi that comes with the kit don't last very long either, so it wouldn't hurt to have a spare. You can get the jaguar cdi, but I can't testify for it, as I've never used one, but the statistics do work out.

Now, as for the spark.

There's a lot to determine on what the gap should be. A lot is trial and error. Sorry for any confusion as well. If the spark gap is to small, then there is the possibility of an over charge going back to your cdi, which can fry it. I'd say anywhere between .015 and .030 max should be the perfect distance. Also, the numbers on disk plugs mean a lot too. Like the NGK b6hs plug is ideal. The smaller the number, the cooler the spark, which means your engine will run cooler, in turn, longer engine life.

So to recap, eBay for generic coils, the magneto is the magnet on the shaft, those rarely go bad on such a new engine.

Your CDI should be fine, but it's a good idea to keep a spare to save yourself time if/when that one goes out.

Plug gap, I'd say a safe bet would be .025.

Hope all of this helped!! If you Galen to locate a aftermarket coil, please post where you found it, as I have yet to locate one!

Have a great night!!

 

[ua2pants]

I hate autocorrect haha and I'm tired. I didn't mean "disk plugs".
Meant to say spark plugs.

And not Galen, I meant locate haha.

 

[butre]

I use approximately a .035 plug gap. Longer gap makes for a better spark if the ignition can handle it but longer spark gaps kill the ignition system faster and if it's too long the ignition won't be able to spark the gap.

I use a Champion L82C plug with good results.