Carb float height Problems, change during ride ?

7/11/2019 1:16pm Edited Date/Time 7/12/2019 7:04am
Have had the bike for 4,5 years. Ktm 65. second son racing it right now.
The carb have never ever flooded on the stand.
Washed the bike, new filter, start the bike... and it´s just pooring out.

Cleaned it but could find anything.
needle good no sign of wear
checked the needle seat and the oring. tested with compressed air in fuel line. OK

adjusted the "tab" so it closees the needle early, 3 times and now its carb is not leaking.

Can it change during the ride?? or have I a ghost that play me a trick?

Help !
|
Paw Paw 271
Posts
3640
Joined
4/3/2013
Location
Benton, LA US
7/11/2019 7:54pm
Yes it can. Vibrations and hard jump landing can do this as that tab is rather weak.

Paw Paw
Dev_1leg
Posts
30
Joined
6/11/2019
Location
Glens Falls, NY US
7/11/2019 8:14pm
Sounds like the o ring on the needle valve and was the gas left on?
Dev_1leg
Posts
30
Joined
6/11/2019
Location
Glens Falls, NY US
7/11/2019 8:18pm Edited Date/Time 7/11/2019 8:21pm
Also I forgot to say Iv pinched that o ring before it put a tiny flat spot making it leak all over as soon as I turned the gas on took all apart and replaced it with the other one I got put water proof grease on the oring and boom no leak.
7/11/2019 10:57pm
Sounds like the o ring on the needle valve and was the gas left on?
Nope turned off after ride and turned on after washing.

Tested the oring, with air test and without the bowl and fuel line connected no leak

If the tab was bent the tab by riding, I did not notice any leak then loading the bike.

So the tab pends then I lay it down and washing it Wink
The pin that goes through on the floating thing was not missallinged then I took i apart the first time.




The Shop

lawson34
Posts
720
Joined
1/19/2019
Location
London, KY US
7/12/2019 6:53am Edited Date/Time 7/12/2019 7:04am
I chased a bad float needle seat once, finally bought a new carb problem solved.. ran a lot of different fuels over the years and let it set for a year without riding it I guess deposits formed I cleaned it best I could but nothing worked until the new carb..

I changed everything in the carb but the float needle seat...

Post a reply to: Carb float height Problems, change during ride ?

The Latest