Bello there,
I’m new here. I own a 1975 rv90 which just been restored. The only problem is that the top speed is just 50km an hour. Normaly this should be 80-85 km an hour ik suppose.
I think the proportion of the gear
(Zahnrad??) is not correct. Can anyone tell me what the right size is for the front gear and rear gear?
Thanks in advance