I'm overhauling a 1996 Tundra II and need torque specs for head nuts. Does head need to be retorqued after break-in period? How is oil injection cable adjusted for proper ratio? I had to replace the throttle cable/oil injection cable. There are marks on the oil injection pump; are they supposed to be lined up at idle position? How important is it to use Bombardier injection oil? Can after market two cycle snowmobile oils be used safely? Thanks for any help.