Exhaust valve clearance

Ok guys, the Husaberg mysteries keep my buddies laughing every weekend!

We have seen MANY MANY 4 strokes needing clearance adjustment because the clearance gets reduced, Except for the mighty 2001 husa FX650, I actually keep gaining clearance on the exhaust valve.

I have read some old posts from Taffy and I have the exact same problem, All rocker components are in spec, but I am only holding adjuster on exhaust by 3/4 of the jam nut.

I was about to install lash caps on the stems, but I don't have enough clearance between the stem tip and the keepers.

Do I have to change the exhaust valves again? I only have about 30 hours on them?

Taffy, did you have any luck finding solution/causes for this?

thanks guys - love the bike, makes all my teammates laugh pretty hard before AND after rides or races!

Alright - Removed head and exhaust valve tips are worn right down to the keepers - another race and I surely would have dropped a valve.

Now the fun begins again - can anyone tell me if the 2001 exhaust valves (200008-01) are the same as the 2004+ valves? I cannot find a listing for pre 2004 models.
When I bought this bike the exhaust valves were new in a box, i didn't notice the part numbers but i believe they were Delwest brand.

Also, does someone have any info on the IWIS master link ordering number would be? I am not pressing a soft link back on the chain.

Lastly - there are 2 head gaskets listed in the part numbers 200321 - 01 (thick) and 200233 -01. Does anyone know which I should get?

thanks! I will post pictures of the valves later.