a discussion on this link
http://www.buellxb.com/forum/showthr...-Clutch-Levers
1997-2003 inclusive suzuki gsx-r 600 levers direct interchange with factory XB levers HOWEVER you must lightly massage the interface on the brake lever where it contacts the master cylinder piston. just remove a bit of material from the lever itself.
IMPORTANT: whatever levers you go with be DAMN CERTAIN there is an air-gap between m/c plunger tip and interface of brake lever when installed or you'll have huge problems bordering on death-inducing. ALSO....the factory was interchanging master cylinders during the 2010 model year. there is no consistency. what one 2010 model year owner says worked for his lever conversion project may NOT work on your bike. keep that in mind.