Mikuni SBN, Different valve bodies??

[Parsonsjb88]

I was just going through my carbs (dual 44) cause they run like crap, and noticed that my valve bodies have different #'s. One has "R 1-2-3" and the other says "R 1-2-1". They look identical to me but I thought I'd ask and make sure, should they be the same #??

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[37]

Those are just casting numbers for Mikuni to trace style, revision and mold location in case of defects. I have a pair in my parts box and both are marked "R1-2-4". They're new as of late 2016.

Yours are the same. Nothing to worry about.

 

[Parsonsjb88]

Good to hear, thanks for the prompt response!