The engine has no oil pressure at idle after warming from a short ride. If left idling for a few minutes it really rattles as same as lifter noise. Kevin at Cowtown, has replaced oil pumps, etc. and still the same. I do not ride the bike hard, shift at the suggested rpms, etc. BRP tecs have been called and they are stumped also. They are willing to replace the engine as they want to see what has happened.