Can anyone help. I have brought a ZZR 250 from a Friend, it's a non runner. I need help setting the cam timing. I'm not sure which marks on the cams do I set up level with the head I have set No piston to (t.d.c), just not sure what marks the cam should be on. I also not sure if the cams have been swapped around. If anyone could help, it would be gratefully appreciated. Thanks.