Clutch Not Engaging

[njf4i]

Well it has happened a couple times but don't know why. So i'll throw this out there and hope for some help.

The first time i was traveling at 60mph, grabbed the clutch, shifted up and let the clutch go. Well when i hit the throttle the rpm's shot way up, i pulled the clutch and released it again, and than the bike felt like it was in gear. Now that has happened about 5 times this year.

Now last night i was traveling at 30moh grabbed the clutch shifted down, and let the clutch out. The same thing the bike acted like it was in Neutral when it wasn't. Grabbed the clucth and realeased it and it engaged.

Now is this the clutch going bad? If it iwas, is this an expensive part to have replaced? Also could it be something else?

Thanks