Steve,
I can't help you with the question of whether the once with four threads will work (my guess is no), but Spitbits is a place you might want to try.
Welcome to the forum by the way!
(PS: I've moved your post to the Triumph forum - you posted in the "Help Using this Forum" forum, which is for posting questions about how to use the forum, not for posting car questions. :laugh: )
Basil