Which company makes the best electronic ignition for a 199A? Thanks!

Bultaco uk hands down

is it adjustable?

Not sure. I bolted it on 5 years ago and it is still going. I think you can adjust it by rotating the back plate but you would have to ask dave renham or one of his colleagues.

I just mounted this one on my 159, works perfect.

Isn't cheap but comes with a lighter flywheel which makes the throttle response a bit quicker..

After I installed it as the instructions said, I checked the timing with a strobe light and it was perfect.

http://www.francetrialclassic.com/en/ignition/1280-bultaco-trial-electronic-ignition.html

perfect at what mm btdc?

perfect at what mm btdc?

Between 2,5 and 2,7 mm