vintagediver
Contributor
I haven't use a banjo on my Themo convertible valves but I have noticed an issue. If you tighten the inserts they will cock in the threads and not be perfectly square to the back of the valve causing erratic yoke connections. The solution is to insert the long end of the key into the insert and use only your thumb and forefinger to tighten while holding the short leg. In other words, tighten lightly. This lets the O-ring square up in the valve without wracking.
I can imagine in a stacking arrangement such as the banjo application that this would be highlighted. It may be that even with careful seating the tolerance stack-up challenges the banjo seating.
Pete
Naw....
The only chalenge is with Genesis valves.