Honda-SOHC

SOHC.co.uk Forums => CB750 => Topic started by: F2John on September 30, 2006, 04:53:24 PM

Title: float height on CB750 F2 1977
Post by: F2John on September 30, 2006, 04:53:24 PM

Does anybody out there know how to set the float height on CB750 F2 SOHC carbs from 1977? these are the last revision ones with the accelerator pump. Also which way up do the floats go? silly question I know but I cannot find any info on them at all and I think mine are upside down. pic attached showing the fuel level in one carb, seems very high and its coming back out of the airbox and the drain tube.

F2John. (http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/carbF2.jpg)

Post edited by: F2John, at: 2006/09/30 16:55

Title: Re:float height on CB750 F2 1977
Post by: Spitfire on October 01, 2006, 10:07:24 AM

Hi there,
           I'm sitting here with my CB750F2 manual in front of me, says the float height should be 14.5 mm for the F model. The manual is very good and only cost

Title: Re:float height on CB750 F2 1977
Post by: ed75 on October 01, 2006, 10:52:13 AM

hi,
haynes manual diagram shows floats with flat side facing down towards float bowl and states float level should be 14.5mm (0.5709in) for the F2.
as to setting float level try here

http://www.salocal.com/sohc/tech/carb/carb.htm

hope this helps,

Ed.

Title: Re:float height on CB750 F2 1977
Post by: ed75 on October 01, 2006, 10:54:14 AM

Post edited by: ed75, at: 2006/10/01 11:01

Title: Re:float height on CB750 F2 1977
Post by: F2John on October 01, 2006, 08:09:48 PM

Thanks for help, do you know where the 14.5mm is measured?

John.

Title: Re:float height on CB750 F2 1977
Post by: ed75 on October 03, 2006, 12:03:06 AM

Hi John, not done this myself yet either but i assume measurement is taken
from carb body to bottom of float (flat side) central to the float if you know
what i mean. for the older carbs there seems to be an issue whether to measure from top of lip or gasket surface,but as the F2 carbs don't have this lip, it must be from gasket surface?
i know these aren't your carbs but this might help clarify the matter-

 (http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/msurpositn.jpg)

as i said before, not done this yet so if anyone knows better please explain, as this is how i intended to do mine,

regards,

Ed.

Title: Re:float height on CB750 F2 1977
Post by: ed75 on October 03, 2006, 12:04:39 AM

Hi John, not done this myself yet either but i assume measurement is taken
from carb body to bottom of float (flat side) central to the float if you know
what i mean. for the older carbs there seems to be an issue whether to measure from top of lip or gasket surface,but as the F2 carbs don't have this lip, it must be from gasket surface?
i know these aren't your carbs but this might help clarify the matter-

 (http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/msurpositn-a8d875a8befea4072a1e852d1affd6a1.jpg)

as i said before, not done this yet so if anyone knows better please explain, as this is how i intended to do mine,

regards,

Ed.

Title: Re:float height on CB750 F2 1977
Post by: ed75 on October 03, 2006, 12:05:00 AM

Post edited by: ed75, at: 2006/10/03 00:06