Husqvarna cr125 no spark

Hello guys.

I did a search, could not find what i'm looking after.

A while ago my friend bought this 98' CR125 as faulty (so it was cheap)

basically all is in place, but there's no spark. we have replaced coil and plug and ht lead, and now we are led to believe (by certain "experts") the magneto (is that how you guys call it ? ) is faulty.

we are both familiar with 4 stroke car and bike engines, but we dont know much about 2 strokes, and that magneto thing is a mystery. I understand that it servers a function of alternator and spark generating device ?

We dont seem to be able to work it out ourselves, and are elooking for some help. as in what to test, and how to test. what else might be causing the issue ?

any input appreciated,
thanks,
Matthew.

Thanks for that.

I'll check it all out again on the weekend and report back.
:ride:

Hello Guys.
Long time no update.
After fiddling with bike no-end, I found out that ignition coil (part of stator in magneto) has no resistance = wire burned through.

I unwound a little bit and found the break to be just couple (10s) of turns into the winding.

The rest (good part) of the winding has 66 ohms.
I wonder whether that's enough.

As the number of turns gets smaller the spark will get weaker. I unwound 2 ohms worth of wire, so % wise it's very small change in actual wire. I can possibly join the bit i unwound (and fix the breakage of course)..., and it will be pretty much as good as it was before....

what i'm concerned with is that i read some diy guide for rewinding stator (for some other engine) and they recommended 250-300 ohms total resistance, as the more coils - the better the spark.

I'll update as we progress...