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The tightening procedure for a Buell air-cooled cylinder head does not specify a final torque value, rather after following the prescribed procedure for pre-tightening, the nuts atop the cylinder retaining studs are tightened through an additional prescribed angle. See the applicable shop manual (service manual) for more detailed instructions.
Excerpt from service manual:
The procedure for tightening the head screws is critical
to proper distribution of pressure over gasket area. It prevents
gasket leaks, stud failure, and head and cylinder
distortion.
11. See Figure 3-8. For each cylinder head, start with screw
numbered one, as shown. In increasing numerical
sequence (i.e. - 1, 2, 3 and 4), tighten head screws in
three stages:
FIRST STAGE: Tighten each screw to 7-9 ft-lbs
(9-12 Nm).
SECOND STAGE: Tighten each screw to 12-14 ft-lbs
(16-19 Nm).
THIRD STAGE: See Figure 3-26. Mark cylinder head
and head screw shoulder with a line as
shown (View A). Tighten each screw a
1/4-turn (90°) (View B).
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