hi. i noticed this recently and i need a little help about it.

my bike starts without any hesitation when it's cold. but let's say i ride it few kilometers and then stopped. so after that if i start it within few minutes it still starts fine. no hesitation. no long cranking. a simple push on the self start button makes it get started.
But if i keep it 15min or more time then i come back and start, i have to crank it long to get it started. it still starts but i have to crank it for few seconds. i didn't have this problem earlier. can someone give some explanation please. my CBR is a carburetted one. i recently cleaned my carbs and plugs are fairly new. is this something to do with the starter motor ? thank you.

 

My thought would be fuel evaporation because the bike is hot, warmer weather may make it more noticeable.

Unless it gets worse, I wouldn't worry about it, just keep an eye on it.

 

i see. thank you very much