In near future, I will have to replace the oil filter on my 1982 XS400 12E (DOHC).The filter(Yamaha no:1L9-13440-91/Filtrex OIF016/07A21 has a recess at one end(marked FRONT) Last time i changed it, I installed it wit this end up. This was how the old one was mounted and also seemed to be...