I like these, but it's possible to get too much oil, resulting in
oil smoke in "less than perfect" engines. Later versions of these
have a special banjo bolt with a more restrictive passage that
trims the amount of oil to the head.
You used to be able to order those banjos from TriumphTune; not sure
if Moss US will supply them separately or not (and no, I don't
know the dimensions...)
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