If you research chain drives, belt drives and shafts you will find all have disadvantages. In a recent large ralley the number ne failure among all bikes were the vaulted shaft drive BMW's.
That said, the chain maintenance is minimal and a whole cheaper to repair than shaft drive. If you can't spend 15 minutes every few hundred miles on maintenance, you need a Hyuandai.
Ride the other bikes and then ride a Triumph.
