2008 Yzf r125 starts effortlesly coldstarts but takes longer to start when engine us up to temp

Hi, so my 2008 r125 starts pretty easily when the engine is cold (i press the starter for no more than a second), but when I ride around for a bit and the engine is up to working temp it takes way longer to start for some reason (it takes like 1-3 seconds). I think this is pretty odd and i don't know where the problem may be so I'm asking for help on here. I thought it might of been the spark plug so I changed it and yeah now it starts a bit faster, but still takes a considerable amount of time to start when the engine is hot. Can anybody tell me what the problem may be and how to fix it?
Thanks