GZ250 Engine Cutting off while riding. pls help

[sheikh2]

I lost my keys for a week and finally found them i started up the bike and it was good at city speeds and in the afternoon on my way back home i was on the highway doing 65 going to 70 and right when i went to 5th gear my GZ stalled and i tried to start the bike again while it was in motion thinking its an old bike (its an 01') it didn't start i ended up on the side of the highway turning my key to the off position then back on and flipping the red switch and starting it again nothing happend, i didnt even hear the starter. so im thinking it must be the spark plug so i take a look at the spark plug and its intactedeven tho its tiwsting a bit i didnt have any tools on me i was kinda stranded on the highway so i couldnt really open the case and actually take a look at the spark plug i was gently pushing down on the spark plug wire that was leading out of the engine. nothing happend after trying to restart it after doing stuff that i didnt know what i was doing i decided to roll my bike off the next exit while i was pushing my bike i decided to try it once more and it WORKED! it started and i started riding again cruising at the speed of 50-60mph 1mile away from my house again switching from i think this time it was 3rd to 4th my bike stalled on my for the 2nd time but this time when i treid restarting my bike i could hear the starter but it wouldnt start as if the bike was cold. even tho it was probably hot. 3 min later it started and i rode home and i figured i would ask the community of GZ for help =)

i dont know what it could be to me it sounds like maybe the spark plug is dirty or the batery is getting funky i dont know, hopefully someone here might help me =) ty

if you can pls email me at high.class.mail@gmail.com