hey need to service my 1986 gk71f gsxr400 soon just wondering as i cant find a manual anywhere what grades engine oils i need. Also where can i get air filters form that fit my bike. i found a K&N oil filter so thats all good.
but yeah any help appriciated!
cheerss

You can get parts from www.wemoto.com or www.robinsonsfoundry.co.uk