Having run a lot of HDs and run a shop for the Harleys in pattaya I can say with authority that belt drives work well in Thailand but there are provisos, ........keep the belt guards on to protect from stones , on very long trips carry a spare belt ,so mechanics can replace it if neccesary. Belts usually last 30,000 miles some have gone 50,000 miles but faliures can happen usually caused by incorrect fitting , TOO TIGHT , TOO LOOSE or the dreaded stone .
Extra tuning of motors has caused belt faliure but stronger after market belts are available.Buells have bike with 100hp running belts with great effect.Victory,Kawasaki,Yamaha and Triumph in USA have big cruiser models with belts so its not just HD.
Jerry