What goes in this hole then?

[db133]

Hi

Sorry to butt in etc.

Ref:I have them in all of my swing arm bikes.

The rigid and plunger A10 have the standard 6 spring clutch (with the dome cover). Apart from fitting an alloy pressure plate, and setting them up with a dial indicator, they are standard (and really nice clutches).

I do not understand how a clutch is set up with a dial indicator.
Will you be kind and explain how its done ?

Kind regards

[bsa-bill]

You need to adjust the springs so that A. you can operate the clutch with one hand  and B so that the pressure plate lifts square so in turn the plates will all part evenly, this is where a dial gauge can be a great help set up to just touch the pressure plate ( avoiding the spring bits obviously ) it will show how even you have adjusted the springs

[BSA_54A10]

Yep that is how you do it.
Set the dial to about 1/2 scale with the clutch pulled in against the pressure plate adjacent to a spring
rotate the clutch 1/6 of a turn, pull the lever and write down the readings.
Ditto for the other 4 studs.
Tighten the high ones loosen the low ones
Repeat the measurements
Repeat the adjustments
When you think you have got it pat. pull in the clutch and kick the bike over  few times them measure again.
Eventually you should be able to get it dead square, but you are liable to die of old age first.
However when done properly it is a joy to use.
It is just a pia to adjust properly.

[dpaddock]

Just got around to viewing this posting and I am astounded to see the rocker box with the threaded hole; I have its relative in my A10 spares box!
I got the thing from a friend several years ago who was purging his garage. I have no idea of its history but I have to say it's not a bodge. As mentioned by Trev, is the Ariel Huntmaster box the same as the BSA Twin?

And so continues the saga. . .

David

[BSA_54A10]

Rocker box yes
Gearbox & clutch no

[trevinoz]

Sorry Trevor,
                       The Huntmaster rocker box casting is not the same as the BSA type.
The internals are, though.All externals of the Ariel engine are unique to that machine but the internals are all A10.
Trev.