demon

I got my freinds banshee here .It was stollen 4 years ago ,he got it back ,had it for 2 weeks ,got stollen out of his truck again,and he got it back again. so It's in my garage now locked up. it would start up if you push started it so I checked the comp .I was bad so we got the cylinders bored and new pistons .the old ones were baaadd! now I tried to start it with the kick starter and nothing so we pulled it with my 4 wheeler and it fired right up. drove it aroud for a bit .the directions said 1/2 throttle for 5 hours. I ran it for maby 10 minutes . this morning tried to kick it again . wont start, so I pulled it again and it ran . ran it for maby 5 min. it kick starts after it gets hot. I let it cool for 4 or 5 hours and tried to kick it again. It fires on the first kick but almost starts to run .then I keep kicking and nothing.let it sit for sa wile and does exactlly the same thing .I can keep doing this with the same result. whats up with that