Another SEM question

Well the title says it all folks.

I have a 1986 430 auto that has no spark at all. I have have checked and double checked to make sure all the wires are connected properly and I have made sure that the ground is grounded properly to bare metal aswell but still nothing. I've also taken off the kill switch just to make sure it's not that.

I've done resistance testing and it may be the coil but I'm not 100% if I did it right. I'm not sure of what all the readings are supposed to be on a good one so if anyone could help me out with what all the readings are supposed to be and from what to what I need to test ( pics would be prefered if possible ).

All info and pics/diagrams would be greatly appreciated!

Thanks,
Zack Tustin

I have a 1995 Husaberg and have gone through several sem stators. In my opinion it is heat that breaks down the insulation on the very fine wires. I am currently using HPI Stator which I think has a reasonable price. http://www.hpi.be/item.php?item=ST5500L .
Testing info here and also repaired stators. http://www.uk-motoplat.com/testing.html

You wouldn't happen to know if any coil can be used with the SEM stator would you or does it have to be an SEM coil aswell?

I think it must be SEM coil/cdi unit. Also with husabergs at least the stators and cdi changed specs around 1999 I think. I would be very surprised if your coil/ cdi unit is the issue.

That was helpful but the colours of my wires off the stator are black, green and red with the yellow for lights

Sem stator test:
Green to black wires 170 Ohms +/- 10 %
Green or Black to ground/mounting plate Infinity
Blue to Blue 11 ohms +/- 10%
Blue to ground/mounting plate Infinity

Sem coil test:
Spark plug lead to black(ground) 3 kilo ohms +/- 10%
Brown to black (ground) Infinity

Hope this helps! Info is from 1987 service bulletin # 10-005

Marty

New test figures for Husaberg
Up to 1998 >>> black & red 1750 Ohms
> black & green 23 Ohms

Thanks for all the help guys!!! Tested it all and it would appear I have a bad coil

Zack has a 1986 430 he is working on, so I don't think the 1995-99 test specs will help with his Sem but good info to know for future reference.

Marty

I have swapped several 1984 ish husqvarna SEM stators with husaberg and think they are the same.
Not sure why specs are different.

Found this from 1982, same specs as husaberg 1989-1998
http://www.yourhusky.com/files/5-electric.pdf

I vote that Swedish designed Husabergs really are vintage left kickers.

i am pretty sure i have an 87 coil if they are the same i will test it
don't have the bike anymore, if you're interested pm me

Saw on here in my research to find info on SEM ignitions a link to an ebay page where they had the correct size fly wheel pullers for my bike, could someone point me in that direction please.

Thanks

The 1982 pdf is actually the first time I have read about reversing directions. Normally I would think your stator is Ok, but I recently got correct readings and no spark at all, I replaced stator and bike fired right away. The HPI stator I recently bought was just under $300 Canadian and arrived in under 1 week from time of order.

The symptoms of these stators failing is usually gradual. The bike will run rough when hot and not rev out, and they usually are impossible to start when hot, but will sometimes start with a cool engine.

Another thing you could check is - Some spark plug caps have a resistor that sometimes fails.

I thought it was ok aswell until I reversed directions like it said to do but then when I saw that it was the same I was not impressed. I'm hoping that it's not dead and there's just some corrosion on the stator and if so I'll clean it up good and then try it again. If that doesn't work then I'll look into getting a new ignition system for the bike.

Where abouts in Canada are you located can?

Nanaimo BC on Vancouver Island

Hello again,

Question about the magnets in the flywheel. If the magnets are cracked/broken in the flywheel could that cause a no spark situation?

yes, and if the bike still has spark the the cracks mean the sem is about to destroy its stator in typical sem fashion.

So if I get a new/used flywheel would the stator be fine?