Rave valves

Just joined the forum and wanted to say hi. Seems like alot of good info posted. Also have a problem with mine was wondering if anybody had an answer. I have a 99 GSX LMTD bought brand new never had a problem till this year. Took my rave valves out to inspect them and they where caked with oil. Now i've taken them out many times before and they where always dry. Does anyone know why they might be oily? Is it bad rings maybe getting alot of blowby? I've have never done the top end so it's probably long over due for some fresh rings and a hone. Also how do I become a premium member? Any info would be greatly appreciated.