I am restoring a XJ900 Seca and on the right side timeing cover I noticed it says DOHC instead of YICS like the others I´ve seen. The other side says YICS and on the 1982 XJ1100R I just restored it also has YICS on bothe sides. My question is: is the DOHC correct for some bikes or has it been put by mistake ? Also the YAMAHA on that cover was not filled in in black and doesn´t seem to ever have been ?? I know all other covers have that blacked in. I checked on boats.net´s parts page for xj900 and it does not show that part being used on any other model bike (which is handy to find if any part also fits other models). I want this restore to be correct and if this part is wrong I´ll need to replace it.