Hellow i hawe now a Yamaha YZF1000r thunderace 1997 and i am using in her Motul 5100 10W40.But it burn its werry much 0,2L at 150km.I want to use a Yamalube 20w40 but i cann not find it in west europe. yamaha germany or austria has only 20w50 cann i use thys?????? Sorry for my englis.