[pouring gas?] - ATV Riders Forums - Honda, Yamaha, Suzuki, Kawasaki, Polaris, CanAm, Arctic Cat, Kymco ATVs

Pages:1

pouring gas?
(Click here to view the original thread with full colors/images)

Posted by: kraemer

ok So my overflow constantly has a stream of fuel from it when idling or low speed riding...

400 ex: 40 pilot 155 main, stock pipe, K&N, No Lid, 5* ADV

Replaced Needle Valve, Inspected carb, Clean extensively multiple times. Replaced o rings on drain screw. Tested Float, no leaks, correct height.

Problem occured after jetting change, engine runs great, no sputtering, no back firing, just pisses out fuel

any other suggestions?

I did look at the needle seat, and it did not look damaged but i did not remove it for further inspection

Thanks

Posted by: lorenjr83

I would check out your needle and seat. the ethanol in the gas will deteriorate the rubber tip after a period of time.

Posted by: UNBROKEN

i would remove the needle anyway make sure the tip is not bent if thats still good and still leaking i would try adjusting the tang on the float

Posted by: dariusld

quote:
Originally posted by UNBROKEN
try adjusting the tang on the float

What does this mean / do?

Posted by: ti2ibal1

Make sure you didn't install the "washer/spacer" upside down. It should look like this.

http://www.atvriders.com/images/articles/pilotjet/pilot2.jpg

Don't ask me how I know this...

Posted by: kraemer

as mentioned above, I replaced the float valve (needle),

The splash guard is not up side down, and the lil tang on the float is plastic, NOT ADJUSTABLE (as the manual describes)

And actually if you install the splash guard up side down it would prevent the float from dropping, thus keeping float valve (needle) closed

any more ideas?

Posted by: UNBROKEN

ure saying that carb has a plastic tang ,why in the world would mikuni do that

i dont have a manuel so i cant verify that.

Posted by: 86 Quad R

make yourself a Q-tip using a phillips head screw bit(that'll just fit into the seat area) and a portion of "scotch brite" . rotate the bit back and forth(being carefull NOT to make metal to metal contact) until you've polished the brass seat. after blowing the passages with compressed air, re-assemble and let us know how that worked.

Posted by: kraemer

When I removed the float discovered a piece of pebble below the float valve. I do not know how I never discovered it.

When You clean your carb be sure to blow through the float valve to the fuel inlet...

it runs like a champ now with no leaking fuel...