Newbie - few questions

[ChvyCruzen]

I bought an 88 250R back in Feburary. It has been modded quite a bit. Bored out once and full FMF exhaust, jets, K&N, Boyseen Reeds - basic stuff.

I'm looking to squeeze a little more power out of it. Im considering a Cool Head, but dont know which CC to get. I want to be able to run pump gas if I cant have access to 103 octane gas.

I am on a 13/38 gear set up and its too short for me. Im gonna consider the 14/39 sprocket set up and widen out the gears a little.

I live about 550-600 ft above sea level and I was wondering what kind of jets should I be using? Its got a 160 in right now, but the slow jet I dont know what it is. Sometimes I have to punch the gas when kicking to start up the motor. Should I bump up my slow jet? My plug seems fine after long rides at WOT, nice brown color - no white spots. I run 50:1 premix ratio with AMS Oil.

Any suggestions as for what I can do to improve my performance?

[tecateboy]

well for your jetting problem does it idle good when it is started and how is the take off? if its a little sluggish then it might almost be too rich of a low jet. but about your performance question, what you can do is have it ported if it hasnt been yet, and/or get a better pipe for it