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float adjustment [CLOSED]

Posted: Sat Oct 03, 2015 10:28 pm
by sprintman111
All the instructions I read in the various Virago forums and in the Clymer manual show the float level being checked with the carbs on the bike with all sorts of right angle screw drivers and sawed off allen wrenches used to get the bowls off to reset the floats if not set right the first time.
Is there any reason float setting can't be done with the carbs on the bench [off the bike]?Gas could be put into the carbs where the fuel line goes in and then the float level could be observed in the usual manner. If it needs to be reset the carbs would not have to be pulled from the bike again or not have to go thru contortions to pull the bowls off.

Re: float adjustment

Posted: Sun Oct 04, 2015 8:00 am
by ViragoJoe
Take a look at these Videos they should help you setting floats off the bike:

https://www.youtube.com/watch?v=Xj220oY26Yo

https://www.youtube.com/watch?v=8wg3VJ1STSM

https://www.youtube.com/watch?v=aiexehn33kg

Carburetor removal:
https://www.youtube.com/watch?v=L9TZOLgop3I

Carburetor Fuel Float Level off the bike:
Yepper, I would say it can be done.
Float Bowl Fuel Level Virago 1100.jpg
With Measurements Float Bowl Fuel Level Virago.jpg

Re: float adjustment

Posted: Sun Oct 04, 2015 8:32 pm
by sprintman111
Joe, Very informative videos and thanks for posting them. But the Virago floats don't have those options. We are supposed to use the clear fuel line on the outside of the carb body. I'm trying to determine if this can be done with the carbs on the bench. Not mounted in the bike where it is a hassle to remove the carbs or float bowls to make adjustments.

Re: float adjustment

Posted: Sun Oct 04, 2015 11:07 pm
by ViragoJoe
If you can determine what the angle the carbs are when on the bike Then I don't see any reason that it can't be done on the bench. Off hand, I don't know what that angle is.

The angle information should be available somewhere. At present it escapes me. We can both research this and then let each other know when found.

Re: float adjustment

Posted: Mon Oct 05, 2015 6:53 am
by ViragoJoe
John,
I added a video on carburetor removal and fuel float level to my previous post. From what I see in the video the carburetors look pretty level to me. So, I really don't see any issue with doing all the carburetor work on the bench to set float height and checking with the plastic tube to the float bowl seam for fuel level.

Hope this helps. Let us know, how it goes.

Re: float adjustment

Posted: Mon Oct 05, 2015 12:02 pm
by The_Proletariat
Why do you suspect a float level issue? This should not change unless you have replaced or messed with the float needles in some way.

Re: float adjustment

Posted: Mon Oct 05, 2015 12:44 pm
by aldo5468
You can test float level shutoff on both sides with the carbs on the bike, but if it's off spec on the right carb (at least for Mikunis; I have no experience with the earlier Hitachis), the carbs have to come off the bike to make any adjustment - it's not possible to remove the bowl (and thus the float) from the right-hand Mikuni on the bike. To bench test, you just need to find a way to hold the carbs firmly in bike position and level side-to-side and provide gas to the inlet barbs. If one test shows proper float shutoff level, make sure to test a couple more times to ensure consistency before re-installing on your bike. Check to ensure that all inside surfaces of the carb bowls are very clean and smooth - I had trouble awhile back with intermittent float hang-up on my right-hand carb - smoothed off some casting roughness on one side of the carb bowl with fine sandpaper and then steel wool; problem solved.

Re: float adjustment

Posted: Mon Oct 05, 2015 9:42 pm
by sprintman111
My floats on my 86 xv1100 are OK now. Just wondering bc I was looking at a new Virago project that I might buy and may have to go thru it all again.
The problem on my bike turned out to be gas logged floats! After much dicking around we found that the floats would hold position initially but would then gradually sink down and flood the carbs. Bought some new ones on ebay and that fixed the problem.

Re: float adjustment

Posted: Tue Oct 06, 2015 7:54 am
by ViragoJoe
How to repair a brass gas logged float:

This guy is a little long winded. He could have condensed all this in a much shorter video like 90 seconds. I think he just likes to talk and he talks slow. So, try to stay awake.

The information is good however:

https://www.youtube.com/watch?v=XJmmbvTqFTA

Re: float adjustment [CLOSED]

Posted: Thu Mar 21, 2019 7:04 am
by  Meason
Why do you suspect a float level issue? This should not change unless you have replaced or messed with the float needles in some way.