SOHC.co.uk Forums > CB750

750 K1 carb trouble

(1/2) > >>

dieffe:
Me again.
I have a bit of a problem with fuel coming out of one (or more) of the carb overflow pipes when the pipe is leant onto it's side-stand. It doesn't happen on the main stand so I assume there is an issue with too much fuel in the float bowls. Assuming it's the float heights, can I check the float heights with the carbs still on the bike or do I have to remove them?
If it's not the float heights, then any ideas what else. I have renewed the fuel tap rubbers as they were perished so now that is fine.

Cheers. (again)  :)

Lobo:
Hi Dieffe,

Unsure of whether you've just rebuilt these carbs - ie all new & fresh. If so, they just might need settling in.. on both my 400/750 there were initial overflows, but after a light tap with a screwdriver head & a couple of outings all 8 carbs quickly settled down.

As an aside, (& for different reasons - ie modern fuel) I turn off the fuel a mile from home & run the carbs dry if putting the bike away for a while.

Don't rush in if ya don't have to!
Simon

mick:
you will have to take the carbs off to set the float heights properly  ;) cheers Mick.

UK Pete:
I have had similar problems in the past with other bikes, i have taken the carbs apart and the float height was good, it turned out to be the float valve  letting by a small amount of petrol only seeping slightly but enough to overfill the bowl
pete

dieffe:
Well I popped the carbs off today as I am annoyed that I neglected to check the float heights before fitting them in the first place. Don't ask me why, just impatience I guess. No. 1 was way too high but the other three seemed pretty close, so I am glad I did it now. I don't know if it's my imagination but as well as not yet leaking it does seem to start easier and tick over better.
I have set the air screws at 1¼ turns out, should I try setting them with it running or leave what seems like well alone?

Thanks all for the advice on the carbs, I am glad I checked them now.  :)

Navigation

[0] Message Index

[#] Next page