i was always told that there's approx. a 12% parasitic power loss on belt-driven bikes between HP at the crank and HP at the rear wheel. i would think that considering your mile-high altitude the 82HP is respectable and normal. i know nothing about dynos or the guys that operate them but more importantly you stated the bike runs very well, fuels cleanly, pulls steadily thru the rpm range. personally i find that much more important in everyday riding than big dyno numbers. but that's me.