• Husqvarna Motorcycles Made In Sweden - About 1988 and older

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Husqvarna Sportsman Magneto

bultacosd

bultacosd

Husqvarna
C Class
Hi, I own a 1970 360c 8-Speed Sportsman. I am running the lights directly off the magneto, however, they are incredibly dim compared to my Bultaco matador which uses the same set up. (The bike is also a little difficult start when hot) I went through the wiring carefully and checked the earth etc but there was no improvement. In desperation, I decided to check the strength of the magnets on the magneto and discovered that only one of the 4 was any good. (This check was done very crudely by seeing if each magnet would support a 17mm spanner)
However, the most unusual thing that I noticed is that the magneto magnets were North, South,South,South. I would have thought that they would have been North, South, North, South. The magneto is a Femsa Var 1-49. (Points and Condenser)
Does anyone know if this is the correct pole configuration for the magneto (N,S,S,S) or has one of the poles managed to reverse itself?
Or, do I actually have the correct magneto? It has "Made for Husqvarna by Femsa" stamped on it, and a direction arrow pointing in the clockwise direction.
If anyone knows the answer to these questions I will be truly amazed.
Many thanks
Jon
 
You will likely find the lighting coil(s) are activated by the multiple S poles. You can ask that question of Hugh's Bultaco in NY and Hogan's Cycle Shop in Agawam MA. Either of those likely have anything you need for a Femsa
 
I considered using a Bultaco flywheel but the problem I found is that the cut away in the flywheel for adjusting the points is in the wrong position. Also the key slot is in the wrong position. The poles are N,S,N,S on the spare Matador flywheel I tested but other models may be different. I may give Bob a ring. Many thanks for your comments, Jon
 
I have a box of 5 or 6 Husky Femsa flywheels that I would be willing to check the poles on but you'll need to tell me how to do it. I do know its good practice to store them separate from one another. I use short 2X4 pieces of wood in the plastic crate where they're stored. Let me know if you think I can help out.
 
Hi, The best way to check the oolarity is to use a weak bar magnet with the N/S marked on it. Opposites attract; you will be able to test each of the magneto magnets to determine their polarity.
If you don't have a bar magnet or the results from your experiment was inconclusive you can try this. Get hold of a sewing needle and attach 6 inches of thread (That's the hard bit). Rest the magneto on a table so that you can see the magnets. Stroke the needle two or three times against one of the magnets. This will magnetise the needle. Hold the end of the thread so that the needle is just above the magneto. Pass the needle above each magnet and you will see that it will either attract or repel. This will give you a good idea of the pole sequence but you won't know if a pole is Noth or south. For me , the sequence is the important bit. Ie N/S/S/S (1 to 3) or N/S/N/S (alternate)
Many thanks for your help, much appreciated.
Jon
 
Okay Jon here are my results from passing a magnet over each flywheel magnet on 7 different flywheels.

Four were +,-,+,- (three Femsa, one Bosch) two Femsa were +,-,-,- and one Motoplat with 6 magnets was +,-,+,-,+,-.

I can say for certain that the Bosch came with a lighting coil if that's any help. Looks like alternating fields is the most common among my stuff. I was surprised at how weak some of the magnetic fields were relative to the others.
 
Regarding the flywheels magnetic strength, do you know someplace to get them serviced? I researched it a couple years ago and I couldn't find a place to remagnetize these flywheels. I did come across a YouTube video on how to build a unit to do it yourself but it was more effort than I was willing to put forth.
 
Many thanks for all your help Crashaholic, I believe you have confirmed that there are 2 types of Magneto in existence. +-+- and the +---.
I suspect that there must be a reason for this and I am guessing that it could be something to do with the lighting coil .
The magneto on my Sportsman is VAR 1-49 ( +---)
The bosch magneto that you tested +-+- powered a lighting coil.
I am beginning to think that I need the +-+- type. Is the femsa number Var 1-48 ? (There are a couple on eBay I am looking at)
In the UK, villiers services are able to recharge magneto magnets. I am certain that there is a place in the US that offers this service.
Thanks again
Jon
 
Jon, the +-+- Femsas I have include a Var 1-46; and 1-48. The +--- Femsas include the Var 1-47 and 1-49. Looks like odd numbers are +---, and the evens are +-+-.

Other differences in my stuff include the attachment method of the hub, riveting vs. cast in place and the placement of the keyway to the points windows. All this seems to vary between pre and post 71 Husky models.
 
Hi Crashaholic, That's good observation with the odd and even flywheel numbers. It would be great if we could find out if CR's are odd and WR's are even ?
The points windows on the 49-1 are in the correct position on my sportsman. If I was to change this for an even number Femsa, which one should I go for, the 46 or the 48?
Many thanks again
Jon
 
bultacosd said:
If I was to change this for an even number Femsa, which one should I go for, the 46 or the 48?
Click to expand...

Good question. From what I've learned here I would say the 46. The attached picture shows the two configurations that I presume to be before and after 71. The flywheel keyways are both at 12 o'clock and the armature plates are close to where they would be when mounted in their respective motors. The 48 is on the left and the 46 is on the right.

DSCN0803.JPG
 
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