[JLittler]

True, a mono shock does have to be beefier, but don't forget about the differences in mount points and hence the impact of leverage on what becomes unsprung weight. In other words the monoshock being further away from the rear wheel has less impact on unsprung weight. The difference in leverage however means the monoshock has to control a stronger force (longer lever ie the swingarm) and hence may be heavier than twin shocks. Unsprung weight is however more significant for handling than overall weight.....