Carb help, please.

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Feb 21, 2011 | 01:26 PM

#11

heybaylor

Stellar HDF Member

Joined: Oct 2010

Posts: 2,601

Likes: 189

From: east texas

I screwed around with a kehien cv on my 91 for years.same problem .
overflowed whenever it wanted to.
cleaned/replaced needle several times..
adjusted the tang on the float to the point of not opening enough to run..
still flooded out of the overflow tube..(when it decided to).

guess what ? you cannot get a new needle seat for that carb,,
only way is a new carb body..$$$$ the carb kit does not have one in it ..just the needle,gaskets,and accerator parts)

I had thought about drilling out the needle seat and tapping it to accept another "screw in seat..
gave that up when I found a later model CV off a twin-cam ..
they upgraded the float bowl (bigger/deeper), and did away with the overflow tube..
zero problems since ..also now get 50+ mpg out of my 1200( was 40 or so with the leaking carb)
highy reccomend you shop around and find a used later model CV ..

Last edited by heybaylor; Feb 21, 2011 at 01:29 PM.

Feb 21, 2011 | 08:41 PM

#12

the blob

Road Warrior

Joined: Sep 2006

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make sure gas cap is venting as well!

Feb 21, 2011 | 09:45 PM

#13

Dixie Dreg

Ultimate HDF Member

Joined: Dec 2007

Posts: 6,186

Likes: 6

From: Gray's Creek NC

If you have the manual for your bike it shows you how to adjust the float angle, you definitely have a stuck float. One source could be trash in your gas getting into the carb and fkng things up. You can examine the float bowl for trash when you get it off the bike. If you don't have a manual then buy one. If you do have a trash problem a Pingel in-line filter will fix it. I had the same problem with my Fatboy, stuck float plus some kind of gritty **** in the gas, looked like rusty sand.

Feb 21, 2011 | 09:59 PM

#14

stilyung

Advanced

Joined: Jan 2010

Posts: 71

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From: Houston

Quote:

Originally Posted by piasspj

In addition to the float and valve check for any bits of cork, plastic, rubber, rust or varnish. It doesn't take much to mess it up. If any of these are present find the source.
Check inside the gas tank, gas cap, fuel line and also replace the filter.

+1 If cleaning it the first time fixed it, I would be looking for something getting in between the needle and seat causing it to flood.

Feb 21, 2011 | 11:02 PM

#15

Harleybass

Road Captain

Joined: Mar 2010

Posts: 671

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From: Toledo Bend Lake Texas

Quote:

Originally Posted by the blob

make sure gas cap is venting as well!

If the gas cap wasn't venting ,it wouldn't be flowing at all.

Feb 22, 2011 | 04:26 PM

#16

nytryder

Grand HDF Member

Joined: Jun 2008

Posts: 4,012

Likes: 298

From: Central Fl

Probably time for a rebuild and a new fuel filter. I would recommend the dealer or a good indy shop. The alcohol can raise hell with carb parts.

Feb 22, 2011 | 06:06 PM

#17

2tyred

Novice

Joined: Feb 2007

Posts: 15

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I had a 97 Sportster with a fuel overflow problem, turned out to be the accelerater pump diaphram had pin holes in it. I replaced that and problem solved.

Feb 22, 2011 | 08:05 PM

#18

the blob

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Joined: Sep 2006

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Quote:

Originally Posted by Harleybass

If the gas cap wasn't venting ,it wouldn't be flowing at all.

on my softail my caps were not venting. the heat caused the gas to expand and build pressure in the tank, then forced the gas out of the overflow tube!!! if opent the cap it would hiss releve pressure and the leak would stop!! problem solved with new caps! or riding with the caps a bit loose!!lol!!