I have been looking at buying a 98 KTM 400 sc and am unsure of this bike. A fellow dirt rider who owns a 520 EXC tells me that he has to change oil after every long hard days ride because KTM bikes typically have a small oil resovoir and cooks the oil. I thought he was joking at first but soon found out he was serious! He stated that if he doesn't keep running fresh oil every ride that he has more difficulty shifting the tranny. Does this seem unusual to any one? Is this a trait of KTM? They sure build a beautiful potent bike but i'm not interested in daily oil changes for enduro riding in the mountains. Some feedback would help make a decision a little bit easier.