Evo Cylinder Head '89 - from HD Service manual
Evo Cylinder Head '89
Head Tightening
Head Tightening
  • Start at Head Screw 1, tighten to 7 ft-lbs torque then tighten 2, 3, 4 (in that order) to 7-9 ft-lbs torque
  • Again starting at 1 and ending with 4 tighten each screw to 12-14 ft-lbs torque
  • Mark line on Head and screw to help this last step. Following the same sequence 1,2,3 then 4, turn each head screw ¼ turn (90°).