KM? Do you live in Canada?
My XB has been problem free. Now, it's only got 7000 miles on it...but they've been as trouble free as could be for me, and the previous owner.
The belt is fucking awesome. It's quiet. There's no driveline lash, nothing to lube or adjust.
People can knock a Sportster engine all they want but the bottom line is that it is a rock solid, super strong, extremely reliable engine.
Oh...and FUCK YOU ebbs. Buells rule and your Kawi sucks.