1976 WR 250 Femsa no spark/Need wiring diagram

In the spring I bought a 1976 WR 250 from near Edmonton, Canada. I live in the US and was going to have a friend pick it up and I could meet him where he lives next to the border. Well, you know how that turned out. After many calls to both sides of the border I finally was able to cross just over and load the bikes from my friends truck to mine. It was now August.

When I got home I gave the bike a look over and it was not in as nice as condition as had been described. It was supposed to only need tires, a front fender and a seat cover. I was told a full top end rebuild had been done and it ran great.

I found that the spark plug was not tightened all the way and when i checked for spark, it had none.

I pulled the kill switch and still nothing. I checked the coil connections, ground the paint on the fram where the coil mounts, and still nothing. The wires looked a little suspect, one connection with only electrical tape. I had no wiring diagram so I moved on.

I pulled the magneto cover and went to pull the nut. With hardly any effort the end of the crank snapped off in my hand! On closer inspection the end of the crank had been broken and very badly welded back on. In the photos linked you can see that only a little fresh metal broke when I rotated the nut. I could also see that the nut had been rubbing on the inside of the magneto cover because it wasn't tightened on all the way. The magneto was not even pressed onto the crank shaft and came right off.

Looking at the stator I noticed a loose wire coming off the points.

This was all very disheartening. I called the PO and he stated to not no anything about it and said he was broke and couldn't refund me partial money for the repair. Not stoked.


Photos here:

https://www.dropbox.com/sh/eiwh24z8615ekcq/AAAokrSiBRmRVzWZEMUKzY-5a?dl=0

After shopping for a crank I called a local vintage parts house and the owner said "your crank is already screwed, why not drill and tap it for a bolt? If it works good, if not you have nothing to lose."

So I tapped it for a 7mm bolt. It seems to work well.

I also looked around for wiring diagrams for the FEMSA stator but didnt find any. I found a few illustrations that looked like the wire was supposed to be connected to the condenser top? So I replaced the wire and soldered it all up.

After cleaning up the crank and inside of the magneto with 800 grit sand paper, I remounted the magneto with the new bolt. The mounting worked great!

But after all this, I still have no spark.

Here are my questions:

- Does anyone have a FEMSA specific wiring diagram they can share?

- What is the best way to measure the stator and coil to see if they are in spec?

- I saw some upgraded ignition systems for this year husky, but none have a lighting coil. Does anyone know of a new ignition system for these that includes a lighting coil? I'd like to keep the lights on this WR.


Thanks and sorry for all the typos.

Isaac

You can use a 139mm diameter motoplat magneto from the 77 360WR, 78-80 390OR 390CR just to name a few. It will bolt right up.

That's helpful thanks!

Is that the route I should go? Is my Femsa setup not good?

I am hoping to test the current setup to see if it is completely broken before I throw it out. Does anyone have the information about how best to test these coils?

Bump.

I am really hoping someone can point me in the right direction to find a wiring diagram or a manual on how to test my stator and coil.

I am looking at this kit as a potential option https://www.husqvarna-parts.com/catalog/item/3736881/4179393.htm

I haven't searched yet, but does anyone know how to tell if my bike is a large shaft or not?

Yours is a large shaft.
Marty

With Monsieur Visiteur 1948 having disappeared, a lot of questions will be harder to answer, he certainly knew his business and was always quick to help with info! There are loads of people on here with knowledge, even I know a bit about autos, but my visits are less with his threads gone!

Bump on this thread.

- Does anyone have a FEMSA specific wiring diagram they can share?

- What is the best way to measure the stator and coil to see if they are in spec?

- I saw some upgraded ignition systems for this year husky, but none have a lighting coil. Does anyone know of a new ignition system for these that includes a lighting coil? I'd like to keep the lights on this WR.

Both my 1978 390WR's are fitted with a "Power Dynamo" system from Germany. They are now sold under the "Vape" banner. Mine have 12 volt lighting with over 80w of capacity. I opted for the DC version with a regulator/rectifier. Very bright lights and starts easy. Gets my vote :-)
I did try an "Elecrex World" system a while ago ....... less said about that the better !

Not sure if this helps but this thread has a wiring diagram at the very end for 73-75 RT models:
http://www.cafehusky.com/threads/1976-wr360-stator-wiring-help.90130/

VAPE ignitions:
https://www.tola-tools.de/en/vape-ignition-ac-husqvarna-wr-250-360-110-femsa.html

https://www.tola-tools.de/en/vape-ignition-husqvarna-wr-250-360-dc-110-femsa.html

Thanks!

Thanks for the links!

Looks like this one is the same as mine
https://www.tola-tools.de/en/vape-ignition-ac-husqvarna-wr-250-360-110-femsa.html

I am a little confused about what Stator to order and after emailing the folks at Tola Tools I am even more confused.

Here is what I emailed them "Will the power the front headlight and rear tail light on my bike? Or is it not equipped to run lights?
Can you verify it will fit my bike, a 1976 Husqvarna WR250? My bike is currently equipped with a Femsa ignition.
I want to make sure these questions are answered before I order. https://www.tola-tools.de/en/vape-ignition-ac-husqvarna-wr-250-360-110-femsa.html "
They responded with
"no, ac variants are just for ignition, no lights.

Please choose dc variants then.
Please choose the right system from your side, we don’t know your bike."

I find this very confusing because in the wiring diagram on the product page it shows a 12V lead going to lighting.

Has anyone bought this 12v AC version? It seems cheaper and I dont need a battery or side indicators that are possible with the DC version.

https://www.vape.eu/en/husqvarna-hva-wr-cr-femsa-115mm-dia

The AC and DC systems with lights are essentially the same. The DC system is an AC unit supplied with a voltage regulator / rectifier.

Update on this.

After finally sorting out what stator to get from Vape EU, I tried to purchase i online and it would not go through. I reached out to them again and was told they do not ship to the USA.

I put it to rest over the winter and now I am trying to get a stator.

I tried to reach out to PVL to verify they ship to the USA and what exact stator I should get but have not heard back.


Does anyone have any other resources for stators for my husky?

Here is a Vape system selling on Ebay

Powerdynamo VAPE Ignition System Stator for Husqvarna WR 250 360 LargeShaft AC | eBay item # 363247025191 You can do an eabay search with this item number to find it. It is not my listing. Or just click on the red link above.

Marty