G'day I got a 98 WR 400, had i since brand spankin new. I did oil and filter changes every 500km's. it lasted 2 years of racing enduros at top clubman level and the odd moto cross race till the big end let go. The hard facing came off the roller bearings mixed in with the oil and made a grinding paste. After a new cylinder and top end, crank rebuild, bearings and crankcases because of a stupid design of the oil pump its going again. Has anyone elce had problems with the big end/conrods in their bike.