the final drive out of the gear box (output shaft) onto/into the propshaft would be 1:1,* then the gearing changed at the rear wheel, i've no idea what the gearbox ratios are in a 1100g.
if you stood at the rear of the bike the propshaft turns clockwise
engine dimentions are same as the other oilboilers
*i'm guessing at 1:1, as i can't imagine any different ratios fitting in that area or making any sense for it not to be 1:1.