'06 GZ freeway driving problems

[cfsmith]

Hey guys,

First post, want to indtroduce myself but at work and have to type quickly :roll: I'll get to the intro at lunch!

A quick question for those of you mechanically inclined... recently bought an '06 gz250 as my first bike, lovin' it (~1,100 miles in 2 weeks!!), but have noticed a bit of an issue the last couple of times I commuted on the freeway. Y'see, I can cruise on this bike at 55 all day long, and get about 65 mph on freeway commutes, but twice this week I've noticed that, instead of the normal performance I get (between 60-65 mph, no noticable slowdowns), after a few minutes on the superslab I'll find myself slowing way down on any sort of incline (to about 52 mph) and then it crawls back up to about 58 mph at full throttle.

Once I exit the freeway my acceleration is waaaay down, it doesn't seem to have the normal 'oomph'. It just takes a while to accelerate again in 5th gear.

I let it sit all day while at work, jump back on, and it's back to normal!

Anyone have any inkling of what this may be?

Charlie