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Old 11-14-2012, 09:53 AM   #1 (permalink)
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floats on a 90 ultra

wide open throttle ran out of gas . Cough and spit refill bowl easy cruise at 70. Checked my floats they were at 27/32 by my calculation they should be at 23.5/32nds = .725-.730

I have ajusted to 24/32nds its quite alot nearly 1/8th inch of fuel. Prior to this I had a lean pop on decel and lean idle so I put in a 50 slow jet. works good My question is will the floats effect the lean idle and slow jet? Should I go back to a 45? I was also considering a 195 main over my 190 any toughts?

Remember all was good as is except running out of gas at WOT
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Old 11-14-2012, 10:06 AM   #2 (permalink)
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Running out of gas at WOT is float level or a restriction in the fuel flow to the bowl. Fuel line plugged, fuel valve, in tank strainer screen etc.
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Old 11-14-2012, 10:12 AM   #3 (permalink)
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Thanks for responding,
I got that as I said my float level was off by 3/32nds maybe a rch more. What I am asking is would this have a lean effect at lower speeds and idle?
Thanks again
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Old 11-14-2012, 10:15 AM   #4 (permalink)
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Not the float level unless it doesn't let fuel into the bowl to the level needed to feed the slow jet circuit.
FYI, the CV carb needs to be off the manifold and tilted to approx. 20* when setting the float.
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Old 11-14-2012, 01:07 PM   #5 (permalink)
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I have a template for that for the cv carb with the square plastic float.

mine has the 2 old style float globes and my factory book does not mention tilting it in fact it shows a traditional upside down flange to top of the float ajustment is this not correct
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Old 11-14-2012, 01:52 PM   #6 (permalink)
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If you have stock cams, you don't need a 50 pilot, or ven a 190 main.

Your issue is the float filling. Despite the float level being at ....anywhere.

You need to look at tank filter, petcock (especially if vacuum operated) fuel line and elbor to carb.

I've never seen a CV carb float go bad and if the problem just started, it makes the issue wonder even farther away from the jet idea.

It's not your jetting or float.

Start looking at an intake gasket leak. Both at the intake and where the carb meets the intake, at the donut. Check all (if any) vacuum lines coming from the carb as well.

One crack in a vacuum line that goes to the letcock, and now you have an intake leak, (lean) and a petcock that doesn't open all the way. (Lean at WOT)
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Old 11-14-2012, 02:26 PM   #7 (permalink)
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I'm pretty sure if you have a CV, you have to tilt it to set the float level. I agree with the Dave and Schmidtys that you have a fuel flow restriction somewhere. If your float is set wrong, it could prevent the bowl from supplying enough fuel at WOT.

To answer your question, no, an improper float setting will not cause a lean idle.
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Old 11-15-2012, 08:47 AM   #8 (permalink)
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Thanks for all the help. yes a slight float adjustment for the old style flat - no angle seems best. Also kudos to you guys the inner piece of the fuel line waqs curled in just a hair with slight restriction. So long and short the floats were off 3/32nds the flat way or 4 /32ndsish tilted at an angle and there was a minor fuel flow issue. both minor but just enough to cause a WOT issue. By the way replaced the fuel line with5/16 line didnt have quarter inch in the drawer..

Good to go thanks again for all the input !!
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