2005 RMZ 450 clutch question
 

i bought the bike at the end of last year, i had 2 strokes my whole life and i decided to by a 4 stroke, the clutch doesn't come in smooth like a 2 stroke, i was told the guy raced it a few times, i have no idea if the guy did anything to it, and i tried calling the guy, i just want to know if thats how 4 strokes are, or if i should try adjusting it, other than that im having a blast on this bike.