Just bought a NQ50

[Lunytune]

Update: well I got the fuel valve in today, bought a brand new one and replaced the plug at the same time, started right up idled for a bit then died and wouldnt start back up until I sprayed starter fluid in the carb fired right back up then idled and revved for a bit and died again, It wont stay running starts right up then dies??? now what do you suggest I took the carb back off and sprayed out every passage again with air and carb cleaner, but In my observation the fuel line from the petcock to carb is see through and when it is idling the gas stays at the same level and or bubbles???

I am assuming you have an inline filter as well that you're seeing the air bubbles in ? That would not be a concern as long as there is consistent fuel coming through.

It sounds like you've got a restriction or sticking in the float valve (needle and seat, as some call it). Pull and check it. BTW, usually when a noob has carb problems like this, by the time he pulls it 1/2 dozen times, he can do it in his sleep. By the time you get this fixed, you'll be an expert at it.

And yes, make sure those passageways are clear while you're at it. Don't need air, just make sure you can get carb cleaner through.

[turbobluemiata]

No I dont have an inline fuel filter just clear tubing, I forgot to mention i don't have the factory airbox and filter so im guessing that's the problem but i plan on just putting a 70 jet and breather filter will that work?

[Lunytune]

No I dont have an inline fuel filter just clear tubing, I forgot to mention i don't have the factory airbox and filter so im guessing that's the problem but i plan on just putting a 70 jet and breather filter will that work?

What does the plug look like now? If white or light gray, you need to upjet. If medium brown or chocolate brown, leave it alone. But you really need to settle on the airbox before reading the plug. If you make change to the airbox after reading the plug, you will have to do it over again. Airbox and carb jet work hand in hand and either changes the reading of the plug.

[turbobluemiata]

Well it will only stay running for about 30 seconds

[Lunytune]

Well it will only stay running for about 30 seconds

That's not a symptom of jet or airbox problem. I've read back through the whole thread trying to see if there is something we've missed. It's either flooding or starving, and I'm more inclined to say starving, as you talk about air bubbles in the line. It's as though the bowl fills, it starts and runs until the bowl empties, then has to refill, suggesting slow delivery from tank. Try this. Disconnect the fuel line at the carburetor and aim it into a container you can observe. Pull a vacuum on the vacuum line, by pump if you have one, or by mouth if you have to. Tough job, but somebody's gotta do it. Observe the discharge from the fuel line to see if there is consistent flow. That will either confirm or rule out fuel delivery to the carburetor. That failing, it's back to the float valve.

Where are you? Your location is not declared in your profile. It may be possible there is somebody close enough to help you. I've travelled as far as 50 miles to help new scooter friends and might travel as far as 100 miles. Others might too.

[turbobluemiata]

Well I'm in Springfield, IL central IL I have a clear fuel line and when i pull vacuum on the line fuel fills the clear tube but doesn't seem to enter the bowl at a constant rate just keeps filling the tube

[Bear45-70]

Well I'm in Springfield, IL central IL I have a clear fuel line and when i pull vacuum on the line fuel fills the clear tube but doesn't seem to enter the bowl at a constant rate just keeps filling the tube

Fuel does not enter the float bowl at a constant rate. It cycles, especially at idle or with the engine off. Once the bowl is full the needle valve is closed by the float. Until the fuel level drops far enough to open the valve again, fuel will not be flowing through the fuel line.

[Lunytune]

Well I'm in Springfield, IL central IL I have a clear fuel line and when i pull vacuum on the line fuel fills the clear tube but doesn't seem to enter the bowl at a constant rate just keeps filling the tube

You're in the middle of nowhere. Too far from the guys in Michigan, guys in Chicago and me in Missouri, not to count guys in Texas, California and Hawaii.

I realize flow may not be constant to the carburetor, as the float valve will shut it off and on as demanded.

This is a test: Disconnect the line from the carburetor and put line in a container to catch the fuel. Pull a vacuum on on the vacuum line going to petcock. Let the fuel flow until your container is full. Objective is to see if there is any restriction in the line, such as a collapsed line. If you get as much as a cup of constant flow, the line is okay, and problem is in the carburetor, i.e. float valve.

[turbobluemiata]

alright well i pulled vacuum on the line running to the petcock and fuel filled the container at a consistent rate, so my problem is the float valve.... I tore into again for the third time and it appears unclogged??? I don't get it

[Wheelman-111]

Greetings:

My float needle appeared to be perfectly fine. It wasn't A new one fixed the problem - mine leaked because it stuck a little open. Yours may stick a little closed. Either way, get a new one, and polish up the needle bore and seat. Search Colgate.

[Lunytune]

I vote for pepsodent!

[turbobluemiata]

Im not sure what the needle bore is?

[Wheelman-111]

Greetings:

"Needle Bore" = the little cylinder into which the float needle is inserted. The seat is where that little rubber cone comes to rest. Both get gunked up, corroded, needle sticks or fails to seal completely. Don't overdo polishing or the needle may have enough room to "*" and catch in an overly enlarged bore.

[turbobluemiata]

d*** this is complicated polish it but not to much and where is the cheapest place to buy a new float valve

[ghpiaggio]

What was the outcome?? Is your problem solved?
I have the same thing, I think......

Cheerz
Grahame