when did the st70 change from 6v to 12 v

hi just bought my self a 1973 st70 , could anyone tell me when they changed from 6v to 12v cheers

I think it was about 1988/9 the mudguards, front forks and decals change at the same time.
Personally I think the 6v models look better

Have fun with the new bike.

It didn't take place on a single day or even year(s).
Early 80's: 6v CDI ignition!
Mid 80's: 12v CDI ignition

Cheers , I think early bikes look the best as well

Personally, i find the 12v bikes more practical to ride, due to the much more superior front forks.

Yes thes are more practical, rspecially due to the CDI ignition.
But who buys these bikes nowadays for being practical?
Thosr people should buy a new, expensive Monkey with injection.