[Mgs] HIF's

[PaulHunt73]

Well, both my HSs and both my HIFs clearly clunk when the pistons are raised
and dropped using the lifting pins, dampers in place.

As long as the lock-nut holds the screw tight, without it jumping threads,
then I wouldn't do any more.  If it does jump threads then yes you do need a
larger screw and lock-nut.

PaulH.

  ----- Original Message -----
  I removed the dampers and did get the clunk, although with the dampers in I
didn't. Go figure.


  Evidently the cause was the idle screw clinch nut on the back carb came
loose and under 30 minutes of constant highway speeds the idle screw rotated
downwards about 5 turns causing the butterfly to remain open.


  The rear carb idle screw is fairly loose when the clinch nut is loose. Is
this common or should I retap and put a slightly larger screw/bolt in?