I found this today, searching around the Rekluse site for upgrade information. They changed the recommended stack position for the EXP. (in July, 2011)
http://www.rekluse.com/technical%20bull ... 207-11.pdf
Guy's if you bought a 2011 Husaberg your bike may be affected by this Service Bulletin. I'm not allowed to reprint it here just contact your dealer and let him research your VIN to see if your bike is affected. THIS IS FOR 2011 MODELS ONLY.
HUSABERG TECHNICAL BULLETIN TB 1103