Clutch engaging at around 6-9k RPMS.

[CraiGDaniel]

Hi all. I have a Suzuki GS500E 1993.

The last week or so my bike has been giving me some trouble. It seems when i open full throttle, the clutch engages at around 6k rpm and releases again at about 8-9k rpm. This only happens when i really open her up. If i go up through the gears slowly, normal acceleration then it wont happen.

Any ideas what this could be or how to sort it?

Cheers

[KlaXon]

Your clutch is slipping. That can cause worn friction plates, springs or even bad oil.
I had that problem too. Changed clutch springs and all problems gone 

[Twisted]

Start with the easy stuff first. Before replacing springs and plates try giving it an oil change with some 10-40w oil that is suitable for a wet clutch motorcycle.

[burning1]

Start with the stupidly simple stuff first. Before you change the oil, make sure your cluch cable is adjusted properly.

FYI: Cluch should be able to launch at 10K rpm, WOT without slipping.

[Shepa]

Start with the stupidly simple stuff first. Before you change the oil, make sure your cluch cable is adjusted properly.

+1 

[the mole]

Start with the really really basic stuff first: Did you let go the clutch lever? 

But seriously:
How many miles on the bike? At that age you might well need new springs or clutch plates or both, its not difficult to remove the clutch and check it all (but yes, check the cable adjustment first).