Tim, one thing in your post puzzles me:
From: Tim I. Purdy <email@example.com>
...One item, and seeking anyone's opinion on this are the spark plugs.
determining the various problems, the starter one of which was
changed the plugs. The PO had 275 Champion....
I could be wrong, but near as I can tell, that "new" Champion
back-references to a fairly cold "N" series plug. Two problems there
would be that a: it's too cold a plug; and b: it's too long a plug for
a TR4 motor, which originally used the L87Y. "L" series plugs are 1/2"
reach, while the "N" series plugs (normally found in TR250/6 and 1296cc
and larger Spit motors) are 3/4" reach.
*Mrs Irrelevant: Oh, is it a jet?
*Man: Well, no ... It's not so much of a jet, it's more your, er,
Triumph Herald engine with wings.
-- Cut-price Airlines Sketch, Monty Python's Flying Circus (22)
Check out the North American Triumph Sports 6 (Vitesse 6) and Triumph
Herald Database at its new URL: <http://triumph-herald.us>