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SEM ignition stators

Re: bigger spark

sparks said:
wildbill said:
Sparks that is the best news I have heard for SEM. I own a older berg with SEM. Can you fix or do something to give the SEM a stronger spark at kicking or e-start speed?
Thanks doing a fine job. :D
Click to expand...

Hi wildbill,
Yes I can it is all relitive to how many turns of wire you put on, hence the early Berg stators will not run the late ones lack of voltage. But on the other hand you can have to much voltage. If you over voltage the capacitor which is 2 micro farad you get a big drop off at higher rpm max voltage accross the cap is round 250 V this seems to be the magic number. A lot of the Motoplat ignitions I rewind I can inhance the spark performance so I suppose I can do the same with the SEM. The early ones wont be a problem but the later ones yes the bobbins are very full to begin with. I have never been asked to enhance the SEM when they have been reound they seem to be ok Joe thinks his performs better than the original.

Regards

Sparks
Click to expand...
Thanks for letting me know about this. Better than stock is fine with me :D .
Thanks and have a great day.
 
Re:

Hi Joe,

Thanks for the prase I couldn't of hoped for a better report, hope it will give you long and trouble free performance.
Thanks to all that have taken an interst in this thread and there has been a big number.
Hope I can help many other people out in the future either with a rewind or ignition infomation.

Regards

Sparks.
 
Sparks still around?

Does anybody know if Sparks is still around?
I have send him two ignitions, but the e-mail adresses don't work anymore (undeliverable) and the website www.uk-motoplat.com seems to be out.

Best Regards,
Arjen
 
RE: Sparks still around?

in case others haven't read it. in another thread, saprks has said that his ISP is a *** and he is finding a new one. will be back soon therefore....

(wonder if he was with metronet like me? what a bunch of w......)

regards

Taffy
 
Hi All,

After the extreme heat tests on my rewound stator which has now reached 62 hours I thought I would go one step further so I took the stator off the rig and tossed it in to the swimming pool that was two days ago, took it out this morning put it straight on to the test rig and ran it up with no change in performance, I also took the temp up to 150C while it was on test with no ill effect. The next test will be to put it in the freezer -20 C to see whether this has any effect.

Sparks.
 
Hi steve
i have recieved the two stators on saturday 18 th tested both on my bike it fired up very easily on the electric start havent tried the kick but im sure they will be fine,i will fit the rewound stator to my bike and keep the std one as a spare. i can see the epoxy starting to expand and dont want to have to walk home.the stator is two years old now well looked after and working fine but i will go to your stator as of now.
The other one is going on a 550 for a customer. i have enquirys from another member and if he reads this he can call me. thanks for the good work
 
Hi nzberg,

I was going to phone you today to see if the ignitions had turned yet, thankfully they have, not bad time really about a week.

That would be good if you could just try my rewound stator even if it's just for peace of mind but also you will be able to tell me if there is any improvement in performance in any way.

Regards

Sparks
www.uk-motoplat.com
 
Sparks
i tested both on a peak voltage meter both put out same using electric starter and the same as my std stator but i did notice your rewound ones the needle picked up quicker and lifted higher then wen to the same max voltage reading for all three stators which was 150 v i still havent ridden any bikes maybe today ill get the customers 550 going , unfortuantly i havent ridden it before so i wont know a power difference and even the owner hasnt ridden it for 8 months . i have a two day ride this weekend so i will seee how mine runs-- and now i have a spare just in case
regards paul
 
Hi All,

Just an up date on the punishing testing I am doing on one of my rewound SEM stators.
Running time now is 236 hours it has been run at temperatures of 180oC to -20oC wet and dry and still with no adverse effects.

I know it's not Husaberg but if any of you dudes know any body that races the old stuff I have put an ignition system together for the Bultaco Sherpa and Persang to replace the points on the Sherpa and Motoplat ignition on the Persang.

Seasons greetings to all.

Regards

Sparks.
 
Hi all and sorry my english language is a disaster,

Sparks, my sem ignition for 2001 Husaberg 400 fe is dead (surprise!) I'm leaving in France: How much money would you ask to repair it (+post about)?

Thank you.
 
It seems that getting your stator fixed by Sparks is cheaper than buying a new one, which only comes as a bundle with the flywheel.

Sparks do you still sell stators with no trade?
 
Hi Slow,

Greetings and welcome to the site, the total cost including return post wil be 195 Euros.
Turn around time is usually about 7 to 10 days in total.

If you require any more infomation just PM me or send me an email.

If you want to speak in your native tongue have a word with Le Frog I think he is from your neck of the woods and speaks French.


Regards

Sparks.
 
sparks said:
up to 1998
BLACK & RED 1750 Ohms
BLACK & GREEN 23 Ohms

1999 to 2003
BLACK & RED 2900 TO 3000 Ohms
BLACK & GREEN 160 TO 17O Ohms
Click to expand...

Hi Sparks, a friend given to me an used 1998 ignition.
Can you "custom" it to run for 2001 spec?
If it's Yes, I'll send to you 2 stator :wink:
 
Hi Slow,

Yes I can rewind your 1998 stator to a 2001 spec not a problem, I will also cut the timing grove on the back, the pre 99 stator fitted on the engine and the timing groove is on the front of the stator.
You can find my address details on my web site.

Regards

Sparks.
www.uk-motoplat.com
 
Great Job!

Hi Sparks,
Thank you for providing a proper SEM stator rewinding service.

I set up a test rig a number of years ago and profiled many a stator using a Lab Scope.
Even as new many SEM units are borderline.

Believe it or not you can indeed interchange stators from case mount / cover mount , however, the timing must be readjusted via rotating the flywheel and the advance curve is different. I did it just to see if I could make it work. It worked, just not well. LOL

In any event, thank you once again for properly addressing this issue.

Best Regards,
Dale
 
Re: Great Job!

Hi Dale,

Unlike Jap ignition stators that will only work in the intended direction SEM will work in either direction this is because of the way the coils are wound and connected, the pre 99 stators are wound and connected in the same way as the 99 to 03, the only difference is the resistance values. So when I rewind a pre 99 to a 03 I have to cut a timing mark on the back of the stator because of it now being housed in the cover of the engine. It is the trigger magnet in the fly wheel that determines the firing point, and depends if they use the North or South pole of the magnet to enter across the trigger pole first. Depending on which way they have set the magnet you can a have spark when the magnet enters the pole or a spark when the magnet is exiting the pole.
Better quit now I'm starting to confuse my self but I hope you understand what I mean.

Regards

Sparks.
 
Understand

"I hope you understand what I mean"


I do indeed.

The stator and trigger windings are nothing more than wire. The magnets, well, they are magnets. N & S pole.

The ECU determines whether ignition is signaled on the rising or falling edge of the generated sine wave.

Cheers,
Dale
 
RE: Understand

Hi Guys

I'm a bit new to all this (this site and bergs) so forgive me if a similar question has been asked before.
How bad is it if the red to black resistance reading on my SEM is around 180K ohms?
Black to green is 172 ohms and the yellow to blue is 0.4 ohms and so are in range.
Bike still starts and runs but it occassionally dies and then is hard to start.
Just looking for clues.

Cheers
Shayne
 
RE: Understand

Hi Coastie. It might be a good idea to add your bike details - year size etc in your signature. I seem to recall the OHMS being mentioned in this post or another one (maybe titled "replace the stator no more") - it was not that long ago - I suggest try a search or if you have done so but with no luck maybe changed the search critria. 2 members that seem to have done the most with Stators are Sparks and JoeUSA. Sparks does Stator repairs and has many happy customers here.
 
Re: RE: Understand

Coastie said:
Hi Guys

I'm a bit new to all this (this site and bergs) so forgive me if a similar question has been asked before.
How bad is it if the red to black resistance reading on my SEM is around 180K ohms?
Black to green is 172 ohms and the yellow to blue is 0.4 ohms and so are in range.
Bike still starts and runs but it occassionally dies and then is hard to start.
Just looking for clues.

Cheers
Shayne
Click to expand...

Hi Shayne,

I'm the guy that does the rewinds on these SEM ignition stators. With the resistance that high you have got a dry joint or blown windings.

Black Green is ok but Red black should be 3000 + - 10%.
If you want anymore info just drop me a line.

Regards

Sparks.
 

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