Mikuni carb overflowing
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- Posts: 5
- Joined: Fri Oct 04, 2013 11:04 am
- Location: grande prairie alberta
Mikuni carb overflowing
Hiya fellas. Well I got my 79 440 running. Now the problem I am having is that the overflow on the carb is dumping fuel left right and centre. The float bowl won't stop taking fuel and she spills out the overflow like a fountain. Is it the main jet? Needle jet? Air screw? I have no idea what to try here. Carb was taken apart,cleaned and put back together and now this. Any ideas?
79 trailfire 440
82 trailfire 340 lx
82 trailfire 340 lx
- Danzig
- Posts: 4431
- Joined: Wed Aug 17, 2005 12:00 am
- Real Name: Paul File
- Location: Van Orin, Illinois
Re: Mikuni carb overflowing
You have a poor seal between your needle and seat. ......or the float height is set incorrectly. Clean your needle and seat again use a wooden golf tee in the seat and gently burnish the locating surface with the golf tee. As for the flora check and make sure it's set correctly and make sure it does not have a hole in it.
1973 JDX8
1978 Liquifire 340
1980 Liquifire 440 CC Racer
1980 Liquifire 440
1982 Liquifire 440
"Gotta Lick It Before You Stick It"
1978 Liquifire 340
1980 Liquifire 440 CC Racer
1980 Liquifire 440
1982 Liquifire 440
"Gotta Lick It Before You Stick It"
- JoeRainville
- Posts: 4355
- Joined: Tue Aug 02, 2005 12:00 am
- Real Name: "John Deere Joe"
- Location: Fort Worth, Texas
- Contact:
Re: Mikuni carb overflowing
Paul pretty much covered it, sounds like an inlet needle issue. They are readily available. Also make sure your floats are not upside down.
-Joe
-Joe
Honorary Tech Editor
Chuck Norris doesn't get frost bite. He bites the frost.
Chuck Norris doesn't get frost bite. He bites the frost.
Re: Mikuni carb overflowing
And make sure your floats actually float.
If there is a pin hole or a spot that worn through from rubbing they get fuel and them and will not float.
Just put them in a glass of water to check.
If there is a pin hole or a spot that worn through from rubbing they get fuel and them and will not float.
Just put them in a glass of water to check.
Todd Schrupp
Milbank SD
Milbank SD
- WinnipegStPaul9
- Posts: 5577
- Joined: Sat Jul 23, 2005 12:00 am
- Real Name: Don Amber
- Location: Churubusco, IN
Re: Mikuni carb overflowing
Paul, Joe, and Todd are right.
DA
DA
Feel free to check out our website www.buscobullet.com for restorations or parts.
Re: Mikuni carb overflowing
You can also test the needle and seat with a hand vacuum tool. Works really well.