Hey guys i purchased a MC-22 1992 CBR 250 RR two months ago, and it goes fine. usually when i want to go for a ride i always warm it up or else it'll just die out, now on cold days i realised that when i first crank it, it wont turn on immediately so i'd have to crank it a few times to get it started. 3 days ago it was pretty cold and i was trying to start it up but it wouldn't start at all, i kept on cranking it for about 4 minutes when i noticed the crank's sound and the lights would slow down on me. i decided to stop and to leave it for tomorrow where there is sun but as i try to crank it, it sounds like the battery is about to go flat. i'm pretty new with these bikes so i don't know what to do. thanks for the help 