Found on the forum a while ago:

"The 1BJ is the post war designation for a bottom feed horizontal carburetter float
chamber which is only found on one application paired with a 275 - 275BT/1BJ.
This is a 1952 specification for an Ariel Square Four assigned to the Rich Child Cycle Company
of Nutley ...

Early JG dynamo control units required the field coil to be wired not to earth but to
the 'D' terminal, as described above.

Somewhere in the collection of parts you may just find an alloy box about 5" long
by 1" wide and 1" high with three wires coming out. I've had one on my Mk1
since the JG units ...

Chris,

PM sent.

Will.

The banshee wail from my 1929 Q box - silent in top - was the sleeve gear bush.

Presumably replaced at some stage with something inappropriate it was dry as a bone
at the clutch end with bits of bearing dust all over the final drive sprocket.

A new sleeve bearing from the club and much spanner ...

That's not my dad - though you'll have come across him if you ever went to the Chiltern Steam Rally as he was a safety officer there for many years, from the early eighties onwards.

Thanks for that. I would have missed him. By then we'd been moved by work to the other side of the
Chilterns, north ...

Off topic somewhat but Stott is a name I well remember from my early
days with the Chiltern section of the VMCC in the early '70s.

One of the stalwarts was Ed Stott of Pinner, a fount of knowledge on
trials and particularly the Scottish 6 days.

(Posting relocated to the correct topic)

Is the article on page 18 of the May 1994 edition of Cheval the one you seek?

I too have a copy of Ralph's file - with additions from Roger Gwynn - and I couldn't find any
mention of the article when I looked yesterday. My intention is to process the file into a
form that could be incorporated into the website much like the KnowledgeBase and the
searchable list of Cheval ...

How are you setting the tappet clearances?

According to the User Guide the inlet is set with the exhaust valve just starting
to open and the exhaust is set with the inlet just closed bot being set with the
engine turned in the 'Driving' direction.