2 problems dont know if its normal

[jack-_-hammer]

On my old 600gsxr On a cold night or a summer day it would start right away, So just out of curiosity Is it normal for my Gz250 on a cold morning to take a while to start i usually have to put the choke which i know that's normal but i have to press the power button 5-7 times is that normal? Another thing is when i'm riding once the bike is warm. Is it normal for the bike to lose power while i'm on high revs? it usually does it 1st gear 2nd gear and sometimes 3rd gear once i get to 4th and 5th i dont really notice it. Just curious Previous owner had the bike sitting for 3 months. I once left my gsxr sit for 6 months and when i started the bike i didnt notice anything different. My friend advised me to use some carb cleaner i'm probably going to do that tomorrow.