nvermind tht raptor man.If something goes wrong with a banshee it's an easy fix all the way around the bike.No complicated valves and timing and all that bullshit on them.Banshees are a simple 2 cylinder motor with nothing to them but can gain an unbelievable amount of HP out of em.A 4 stroke on the other hand...a few hundred in mods isn't gonna get you far lol.
When you go look at it make sure you tell the guy to not fire it up before you get there.That way you can see how easy it starts when it's cold.Also bring a compression gauge.Test the compression in the cylinders.You want at least 125psi.Anything below that is probably ridable but will cost you some new rings down the road.The rest is simple,like you would look at a car.listen,check for leaks yada yada.Fire it up let it idle and warm up for 10 minutes why you guys bullshit then take it for a ride.
Good luck man,hope it works out..My father in law had a pretty bad ass warrior then he rode a banshee,He went and bought a banshee then sold his warrior...Needless to say he likes 2 strokes now.