Well I bought this ninja 250 off of Craigslist and I cant seem to figure out the problem. When I first got it the bike ran for about 2 hours no problem, thats when I was figuring the bike out. I started heading to work and the bike turns off. I pull over and it comes right back on and I head out, 5 mins later it turns off on me again this time when I was accelerating. Then it would no turn over maybe because I tried to many times...the guy I bought it from picked it up an had his mechanic redo the carbs, and checked the battery. I get it again and it runs ok but like before it wont stay on by itself after warming up in neutral after a couple minutes. I take it out and it turned off on me again while on the road. Any suggestions?