How important is getting the float height correct on SU HD6 carbs?

[fishyboy]

Hi All,
Following my rebuild of the HD6 carbs (thanks for the advice on my previous thread) on my BT7 I have been looking at the float bowl height adjustment. According to my manual the height should be set to 11mm (using a drill bit or similar). At the moment the forks are about 12-13mm. dies this mean that the fuel level will be 1-2mm to high in the jet and that the mixture will me too rich? Should I adjust to exactly 11mmor leave well alone?
Thanks
Phil

 

[oxford]

Hi Phil
yes! It should be set to 7/16" I believe. If it isn't the fuel will be higher in the jet. If it says that in the manual it's probably a good idea to adjust it.
Matthew

 

[Lambdaman]

If correct height is 11mm and yours is 12 -13mm, that means your float will be 1 -2 mm lower, as this distance is measured from the top flange of the cap, therefore the level will also be 1-2mm lower in the jet as both are equal. So if this is the case your carb will be running lean.

 

[John Turney]

It's critical that they be correct as specified and they both be the same. Otherwise, you won't get it to tune correctly.