I wonder if the track will be worth a shit this year???
All the Branch heads I've seen have very polished ports, razor thin seats, surface ground rocker and head gasket surfaces (to get them perfectly parallel) and these numbers stamped near the intake ports (on the bottom).
....otherwise they look stock from the outside.
The early 900 Sportster Branch heads are not as common as the 1000cc heads.
I took my friend Chad's rebuilt '65 panhead engine to him the other night . . . and the first thing you see when you pull up - is the lamp in the window. Kinda hard to miss it...
Reid and Zach (above)
We've had this 1970 ironhead engine with peeling chrome that would make a good mill....
The LEFT tappet is lighter by about 1/2 oz. or almost 1 oz. total valve train weight(X 4ea) ...at 5000 rpms, that's a difference...more weight for the valve spring to push down - to hold the tappet on the cam...
1953 Harley KK Model (and some KRs) had hollow tappet adjusters too,
with a hole right down the middle.
NOTE: The RIGHT tappet is stock in Harley WL engines, and what makes it so heavy is that it's thicker, and solid steel. The LEFT tappet is standard on early 900 Sportster engines.
You can run the lighter tappets in WLs, K Models, whatever...they're dimensionally interchangeable, same length, diameter, etc. To most folks, ounces only matter at the post office, or your drug dealer, or the judge.