Topic: Carbs spacing and outside dia of carb spigots

[SunLar]

Are the spacing 72-88-72 similar on all K-F1-F2 carbs and what size are the outside diameter of carb spigots?

What are the difference between K and F carbboots beside length?



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[kmb69]

CB750K's and F's have 77-80-77 centerline carb spacing.
Can't address all the spigot diameter info.

[754]

410 heads and maybe the last two K years had bigger of on the intake ports.
 But I got the long rubbers on my 410 head.
 I think the 76 and down are  about 2 mm smaller

Now 75 and 76 F 750 motors, do they have round top carbs?
 

[slikwilli420]

75/76 F heads were the same as 77/78 K heads. The early F had round tops.