• Screaming Eagle Pro CNC Ported Heads

• Testing the Clearances in Piston Valve Pockets (reliefs)

• Ring Gap Orientation

Ring Gap Positions during Installation: Exact ring gap orientation should be with the documentation that comes with a new set of rings.
The FSM's say to space the gaps an equidistant around piston. That leaves a lot of variance.
The rings will rotate during operation so they will not stay exactly where you put them.
This initial procedure for placing the ring gaps will help keep down blow-by during initial start-up while the engine breaks in the rings.

Orientation of the ring gaps is a debatable subject.
However the one thing most agree upon is the adjacent rings should not be spaced near each other.

These are widely practiced ring gap locations during installation 1)	These gap positions are in the 2004 FSM via a drawing. 2)3). However, specific rings notations are not (as they are below)

Screaming Eagle Pushrods for Sportsters

• SE “Perfect Fit Pushrods” for Stock Heads 1991-2006 - (18421-06) stock SE length.
• SE “Perfect Fit Pushrods” (18424-06) for Single Plug SE Pro Heads (16677-05) 1992-2006
  (published as - 0.050“ under stock). However, it appears they may be 0.050” under their stock “Perfect Pushrod” inventory since they are definitely shorter than 50 thou that for 'factory stock pushrods'.

The pic below is a comparison between the suggested 'Perfect Fit Pushrods' and standard rigid Evo 1200 pushrods. The SE pushrods are tapered with a beefier bottom end at 0.434“ OD tapering to the standard 0.375” OD at the top. Even though the heads have been shaved 0.050“, the intake pushrod was shortened by 0.071” and the exhaust one shortened by 0.065“. Length measurements were taken with a 12” Starrett vernier caliper.

• Kit # 18421-06 (stock SE length)