I have heaps of spare barrells in my parts collection..

What I'd like to know is what the numbers stamped on them represent?


H1 & H2 = High.

L1 & L2 = Low.

F & F2 = ?????


Also what's the go with the other numbers stamped on them?? I know what the letter stamp represents..
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MC18 Race bike project..
MC21 Race bike..