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SOHC.co.uk Forums => CB750 => Topic started by: adriangsmith on March 29, 2017, 09:58:18 AM

Title: F1 carbs on an F2 engine
Post by: adriangsmith on March 29, 2017, 09:58:18 AM

Hi All,
I'm running an F2 engine with F1 carbs, marshall exhaust and cone filters.
Do i need to change the jetting at all to get the best performance from the F2 engine?
It seems to be running rich with the needle in middle position, #40PJ and #115 MJ.
Also if left standing for 2weeks it will inevitably only run on 3 cylinders until you remove the jets from the offending carb and blow them through.
Looking for a UK source for main and pilot jets if it works out cheaper than buyng the carb rebuid kits form DSS.
Thanks
Adrian

Title: Re: F1 carbs on an F2 engine
Post by: paul G on March 29, 2017, 12:31:05 PM

I have just used these.

http://www.motorradbay.de/honda-sh-2.html?sessID=7cbf55589423ec22e4362c701daeaf9f&sessID=7cbf55589423ec22e4362c701daeaf9f

Title: Re: F1 carbs on an F2 engine
Post by: Johnwebley on March 29, 2017, 12:40:05 PM

lots use these,I bought 4 sets for my 500 and with P&P cost less than £50

http://stores.ebay.co.uk/cruzinimage-uk1484?_rdc=1

Title: Re: F1 carbs on an F2 engine
Post by: Dazza215 on March 29, 2017, 01:00:52 PM

I used the cruizinimage jets and they have been great.

Title: Re: F1 carbs on an F2 engine
Post by: sohc bob on March 29, 2017, 02:47:09 PM

are the keyster carb kits from this company any good for the 78 F2

cheers bob