MrCycles Honda Kawasaki Polaris Suzuki Yamaha Motorcycles ATVS Scooters Utility Vehicles
Looks like it'd cost you about $120 in parts, good thing is you don't have to pull the engine to get at the clutch.
I've seen this happen twice before with motorcycles where a "high grade" of engine oil was used and it had friction modifiers in it, they make the clutch to slippery so it doesn't grab.
If you want to try to fix this on the cheap, pull the clutch and rough up both the shinny steel rings and the cork covered rings with some sand paper, 100 grit sand paper should work well, this will allow you to remove some of the slick surface on the cork exposing new sticky cork, roughing up the steel rings will put new cross hatching in, these will hold oil while the clutch is disengaged so it doesn't heat up as much, the cross hatching will also give a little more bite when it starts to grab and the oil gets squeezed out.