the 650 is a great bike but it is very heavy as you found out. its nice a nimble on the road but if you get into any loose surface its weight shows right away. If you do mostly on road riding and maybe some light trails it is a top notch bike. Mainly designed for touring in my eye. The motor is great and has gobs of usuable power(once you break it in). all in all its really not that heavy and i rode one years ago so i might be wrong about the new ones. but have fun and learn the bike. Riding is mostly the rider and not the bike, so its really what you make of it.
have fun
have fun
