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Carbs - F1 or F2?

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StealthDJ:
So after my F1's 20 year sleep, I've decided to give the carbs some attention - new airbox and engine rubbers, new boots, new jets and seals, plus the whole lot going through the ultrasonic cleaner (multiple times - the previous owner was pretty liberal with WD40 as a 'protective agent', so they're caked in crud.)

But it occurs to me that I still have, from my previous ownership, a full set of F2 carbs and the accompanying airbox.

Is it worth me fitting the F2 setup instead?  I figure its newer, and slightly more technologically advanced, not to mention not having all that exposed linkage that the F1 items do.  Not sure if it'd give any power advantage, but I wouldn't complain if it did.

Or will I just end up chasing bizarre mixture problems?

royhall:
The F1/K carbs and F2 carbs are completely different, even the fitment is different. There is a way somewhere on the internet where you can swap F2 for K carbs but have never seen anything about the reverse. Put simply they don't fit.

Nurse Julie:
F1 & F2 carbs are identical, Keihin 069a's
Forget that........ I thought you were talking CB550 🙄🙄🙄🙄🙄 That's my senior moment of the day.... 😂😂😂😂

Bryanj:
Plus the F2 has the godawful pd carbs that are an utter nightmare.
DO NOT fit new jets just ultrasonic all the old stuff, aftermarket brass is not always accurate

StealthDJ:

--- Quote from: royhall on July 01, 2022, 10:06:09 AM ---The F1/K carbs and F2 carbs are completely different, even the fitment is different. There is a way somewhere on the internet where you can swap F2 for K carbs but have never seen anything about the reverse. Put simply they don't fit.

--- End quote ---

Interesting - my old F2 had F1 carbs fitted (which is why I have the spare set).  It did have pod filters fitted though, so that may have made the conversion easier...

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