Gearbox clutch cable attachment

[Sunbeam]

Hi, does anyone know how or why BSA made some gearboxes with a slotted screwed hole on the casting top ear for the clutch cable and some boxes with a plain through hole and cable attachment by a nut either side of the gearbox top ear. I can reason why they did the slot and thread... for easy attachment of the cable and adjustment...can't see why they made gearboxes with both.....thanks.

[berger]

the boxes with plain holes were for a ferrule to insert into the plain hole with cable adjustment at the handle bar lever, the threaded gearboxes didn't have a cable adjuster at the handle bar lever when new --- me thinks

[muskrat]

G'day Sunbeam.
As berger said.
Cost cutting! One less process of threading the hole.
Cheers

[JulianS]

The cover with the plain hole was introduced for the 1960 season twins when the cable adjuster was moved to the handlebar end.

[duTch]

 

As berger said.
Cost cutting! One less process of threading the hole......

And cost of cutting the slot , otherwise all the above, which been discussed a few times before but I can't see any reason to not have adjusters at each end- apart from counting rivets .... I have the early version box and is good for primary adjustment , but the lever end is good for fine tuning on the go-  which is not often necessary but handy when needed