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Float height problem i think?

  • Thread starter Thread starter Jeepin it real
  • Start date Start date
J

Jeepin it real

Guest
1981 GS550L. my float height was set too low and it was running very rich and fouling plugs. now i set them to .9 inch(my vernier caliper is in standard units) now it only runs on choke. and no its not the pilot jet i cleaned these carbs very well. i think i reset the floats too high but just wanted to hear what you all had to add. im really dreading taking these things off again
 
Jeepin it real said:
1981 GS550L. my float height was set too low and it was running very rich and fouling plugs. now i set them to .9 inch(my vernier caliper is in standard units) now it only runs on choke. and no its not the pilot jet i cleaned these carbs very well. i think i reset the floats too high but just wanted to hear what you all had to add. im really dreading taking these things off again
Click to expand...

A few of things come to mind.

Your new float levels are set in the middle of the recommended levels for CV carbs (21.4 -23.4mm). This figure is set without the bowl gasket in place.

Have you re-adjusted the fuel and air screws since changing the float heights? If you leaned them off while trying get it running right with the old float levels, you will now need to enrich their positions.

Make sure that the float needles are lightly seating when you set the float levels.

Is it possible that your original float levels were compensating for air leaks in your induction system? Have you checked the condition of your intake boots, o rings, air box seals? What's the condition of your air filter?
 
Last edited:
Hi,

Click Suzuki GS Series Carb Specs.

The float height spec for your bike is 22.4mm (+/- 1mm) but it usually works best if you can set them right in the middle of the spec.

float_height_bwringer.jpg


manual_float_height.jpg

float_height_steve1.jpg


float_height_steve2.jpg


Measure without the float bowl gasket.


Thank you for your indulgence,

BassCliff
 
Hello,

I have a set of carbs for my GS450 stripped for cleaning and I'd like to set the float height. The manual (250 and 400 modells with an appendix for 450) says 22.4mm. This is in line with the carb spec xls file i found here, however the manual shows the height measured on the flat top of the plastic floats and i have brass round floats, like on this picture:

http://www.cmsnl.com/suzuki-gs450-et-st-ex-sx-ez-1980-1982-usa_model16015/partslist/92173.html

Also, I have 4C3 jet needle. On the spec file from bikecliff It says (under GS450 US, the first one) it should have 4C2...

So I'm a bit lost what kind of carbs I've got.

Either way, am I ok with measuring the float height on the top of the barrels? I have 22.5mm withouth gasket, so it should do, right?

Thank you!
Z
 
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