A 2.735 diameter I don't think is where you wanna go.
Didn't you mean the FRUSTRATION?The FUN is figuring out what that range is for your bike and riding style.
From R1173L the "R" is the Keihin part #, the "11" is the taper in degrees which is 1degree 15minutes, the "73" is the diameter at the fattest part which translates to option P 2.745mm,
and "L" is the L1 length (top of taper to top needle clip notch) on the upper diagram of the needle which the chart doesn't list but it could be a length between the listed "K" (38.6mm) and "N"(39.95mm).
The only difference between the 1173L and BEP is that the BEP has an L1 almost 1mm shorter which means that for the same clip position it is richer.
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