125-200cc timing

I want to check the timing of my TM EN300.
How do I do this, I have a dial indicator to find tdc.
What do I have to measure, there are no marks on the case or stator, fww.
My dealer (who is technical), says I should measure center of the pickup coil to the center of the raised portion of the fww. Maybe I understood him wrong but I think it's strange.

Can you put a meter on the pickup coil output and see a switch point? I don't know if the unit on that bike is a binary switching type or some sort of fancy inductance motion electrical magic that will only work with a moving flywheel.

I'm sure that would be possible!
After some more thinking, I'm pretty certain it should be like: mark pickup and raise portion on ff (since no marks are apparent), set piston to TCD (zero the dial) and turn the marks so they line up, now look at the dial and you should read the ignition distance before TDC. Am I correct?

Just keep in mind that the dial is going to show vertical distance, some math is involved to translate that into degrees of crank rotation.

The one variable here is that I don't know if the ignition fires when the two things are lines up on centers, or if it fires on the leading edge or trailing edge or whatever.

I think you have the right idea though!

I think the best way is to mark the flywheel and case at TDC and then do the math (or use a degree wheel) and mark the case for degrees BTDC. Then use an inductive-type timing light with the engine running. This will get you pleanty close to "check" it. Do you have any specification to compare it against? How the spec is given would determine the easiest way to compare them.....

Yes I have the stock spec which is measured vertically x mm BTDC. I retarded it 1,5mm let see what it brings. (It's still advanced more then stock).