That must be a record for you Chris! Brake Inbalance can be a pain, as it's not always obvious what's causing it. Ihave swapped the front drums from side to side, with some success.
Going to garage we are not driving back & forth to use the test equipment like we did last time! & they swapped drums over last time they did brakes. It is a record for The Colonel Martin!
Last time I MoT'd Peggy I had to do several very hard braking sessions on the rollers before they came into balance. They need to be used quite hard, gentle braking is not good for them.
I probably should have braked on the way there (I very rarely touch brakes)but they say they need adjusting so just getting it done, last time made a lot of difference so happy to have them sorted.
If it was a c 90 I would keep it well away,....it is a 50 cc its been along time since I was in that band struggling to do 30 mph! It definitely needs something bigger cc! Got this to go with the Colonel when we camp did you spot it?