Ktm Smc 660 `03

Moin I have a serious problem, my smc has crank bearings and conrod bearings defective, after just 6800 km mileage, I was always good to her , love , oil change and warm driving before she was already a few times leaking lid and housing, I had everything made the dealer and nu because I thought because of every oil change in the workshop made themselves ventilated and the good shell new filter listened to the thing like a shake plate . From the dealer who says 12oo euro na prima I called KTM they really had a lot problem with the “quality managment”. Did someone experience that even then a reply may be moved KTM yes still I am curious and ride for all the sweetness of their KP sport has had a lot of problem with the “quality managment” ?