first off: nice to know that simson´s are in denmark too.
2nd: if you want a 60ccm you usually don´t have to reinforce the frame
with suspensions. if the engine get´s much stronger you should think aobut.
brakes (by 60ccm) usually not too. ( i personally would aquire the sport- brakes from AKF.) look at there:
working pretty good on my bike.
as far as i know (berichtigt mich wenn´s falsch ist) is your moped the follower of the S 51 and they should have nothing changed on the build-up.
exacly the same was the S 70 with 70ccm. just an S 51 with more power.
ok... so far, so good.
if you have any further questions just ask.
hope i could help you.
if i made a mistake the other users will tell me and you.