Topic: proper carbs?

[Zig]

the rack of carbs im working with (came out of a box of spare parts) are stamped "657b" are these the proper carbs for 750 k5?? just thought i would ask before i spend a million dollars on rebuild parts.

[seaweb11]

Do you have a camera?

[Zig]

pic already posted in "project beginning" but here is another.
waddya think seaweb?

[harleyhonda bobber]

numbers for those carbs are coming up as 1975 cb750 f

[Zig]

are they interchangeable with the K series?
what do i have to do to make them work, i assume jetting is different?

[Zig]

are they interchangeable with the K series?
what do i have to do to make them work, i assume jetting is different?

any opinions?

[BeSeeingYou]

I think the stock jetting is the same as the K5 with 105 mains and 40 idle.  I believe the emulsion tubes are different with the F tubes being an improvement so it would be an upgrade IMO.  One member mentioned in another thread recently that he had a noticeable improvement when he put the needles and emulsion tubes from an F into his K.  I would think they would fit.

[Zig]

thank you.

[harleyhonda bobber]

if they will mount onto your intake they should work...chopper teck has all the specs from float height, to main ,and slow jet numbers

[mystic_1]

I have a 1970 CB750K0 and I'm running 657b carbs. 

mystic_1