Starting/Choke Issues

[jljowers]

I have read previous posts that say their gz250 can be difficult to start at times. So here is my scenario. I too purchased my bike used (2002 GZ250 with 940 miles on it). It seems to start just fine, after I have adjusted the choke. The problem, or annoyance, is how the engine on my bike revs after I have let it warm up for a minute or so. It seems to be revving much too high. Once I start my commute to work (11 miles-about 20 minutes) my engine is still revving like the choke is still on. Even when I put the bike in neutral at a red light, it sounds like I am applying the throttle, only I am not. I can then sometimes put the bike in gear, and it will take off with no throttle applied after I disengage the clutch. This high-revving will continue for the duration of my trip sometimes. The other factor in this equation is that this only occurs in the morning. When I get on my bike to go home (10 hours later) it starts without using the choke and acts like it should. I am a new rider, so I may just be missing something all together. I have had this bike for about three weeks and this has only occurred for the past few days. Thanks for any advise.