the 04 - 05 R6's have a really twitchy throttle. I had an 04 (stolen), and it was difinatlly noticible. That 'hiccup' is prolly a surge in power when the gas kicks in. if your looking for an R6, get a 2003. it has one of the best FI's ever made on a sport bike and the other modifications to the 2005 are prolly things only a pro would be able to appreciate.
LISTEN TO SLAYER
AIM: chR1s sedition
2003 R1 (black / red / hell-fire)
"All black, no bling"