Single Sided Swingarm

[Cafe Project_imp]

The numbers are actually the same. If you add them all up, the total equals the same set of parts for each bike i.e. wheel, tire, sprocket, brake disc, shocks and linkage, axle/hub and swing arm.

Check the picture. The Ducati sprocket/disc is part of the swing arm hub and on the Honda it's attached to the wheel assembly. That's why the Ducati swing arm is heavy and the Honda wheel is heavy. But add everything up and it's the same set of parts. Ducati is way lighter.

Different bikes with different design parameters.

I agree about the unsprung weight comment, but that would be too hard to work out exactly. It's close enough - for me.