New (to me) GZ250

[kaput]

Hi,
I recently bought a used 2005 GZ250 for $700! Its a bit rusty and needs some work but I got it running with a new battery. I saw the manual here and thought I may be able to get some help here. I have some Idling problems, I took the carb apart today, cleaned it and put it back together again (2x cuz there was an extra part left over the first time) , cleaning helped a bit I think but I am still having issues. Is it normal not to get a normal Idle on this bike untill 15 minutes of riding? I am seeing others having this problem. I will try adjusting the valves tomorrow. I have never worked on or riden a bike before this one but had a 65 VW bus for years which always needed some kind of repair. I actually sold it last summer and am happy to have something new to tinker with :2tup:

So if anyone can point me to some typical tuneup stuff that may help me get this bike up to snuff that would be cool.

Also I have an exhaust leak, I put new seals on the pipes where they connect to the engine but i can not seem to get the pipes to butt up to the engine, the metal pieces (that attach the pipes to the engine) just bend rather than making a tight seal. seems to be too soft. Anyway, thanks in advance for any help.
-=Kaput=-