I have deliberated a fair bit about which primary ratio to go for but I think now I have a plan. As you all know it is a engine split job to change the larger primary gear so having some options for the smaller pinion is extremely handy. I decided to start with a 16/68 which gives a ratio of 4.25 to 1. DRT make a 15 and a 17 pinion giving me the availabilty of 4.53 and 4.00 to 1.
It is fairly hilly around here and I am seriously considering using a 3 speed gearbox so I have decided to go shorter than the 3.72 as fitted to the SS50 and the 50SR.
