Sometimes on my 92 600F2, I'll really give it some throttle and the RPMs will shoot up but it's like the bike has to catch up to it. I'm really not sure how else to explain it. I have a suspicion that the clutch may be slipping. Does this sound right? Do you think I need a new clutch pack?

 

If your clutch is slipping, it can act the way your describing. The rpms rise while the bike does not move. Usually, it will happen in higher gears where you have more load on the bike.

However, make sure your clutch cable is adjusted correctly. If its not fully releasing the clutch, it could cause an issue.

Also, make sure you are not using the improper oil. If you are using regular automotive oil with energy conserving additives, it can cause your clutch to slip.

 

+1, exactly what i would write.

 

+1