I might be trading my yz250f dirt bike for a 2002 Kawasaki ninja zx7r. But there are some problems. The dirt bike I have runs great and I haven't had any problems yet. The ninja on the other hand when I looked at it seemed to have trouble cranking and staying cranked. It does have a clean title and the exhaust is straight piped so it's EXTREMELY loud and I love that! When he first brought it, it took a while to crank and he said he has not rode it in a month until today. It took a while to crank and it wouldn't stay running for a while until at the end it finally worked like it should and took off waking all the neighbors up lol. I really want it but my question is, what all would it need to make it run better like it should? He said all he has done to it was clean the carbs about 3 months ago. I'm open to all suggestions.