Help! 4 stroke bike not getting fuel.

[bikejock]

I was trying to start my bike again & it wouldn't start after like a dozen pulls of the pull start. Tyen I noticed fuel wasn't flowing through the fuel line. I just got a replacement valve &I I know that works because after I pulled the fuel line from the valve it spilled fuel when it was off & stopped spilling when I turned it off. What is causing this? Is it my fuel filter or something else? I got one of those fuel filters for 75¢ from Phantombikes if that helps at all.

The fuel line that goes from the bottom of the fuel filter to the carb is filled with fuel but the line going from the top of the fuel filter to my valve isn't getting any fuel flow. Anyone know what's going on? First time it's ever happened.

 

[Timbone]

Remove the fuel filter.

 

[bikejock]

Remove the fuel filter.

Tried that. Didn't solve the problem. The problem seems to be with my carburetor because when I turn the screw that drains the fuel it flows through from the tank just fine but when I tighten the fuel drain screw stops receiving fuel from valve to carb.

 

[crassius]

what you describe sounds like the carb bowl is full. but you're not drawing anything into engine - a clogged jet would be first guess here

if you hold your hand over mouth of carb when you pull it, does your hand get wet? does carb look wet inside?

 

[bikejock]

what you describe sounds like the carb bowl is full. but you're not drawing anything into engine - a clogged jet would be first guess here

if you hold your hand over mouth of carb when you pull it, does your hand get wet? does carb look wet inside?

I unbolted the fuel bowl & cleaned it out. After that I hooked up the carb to the engine & plugged in my fuel line & turned on the fuel valve. After that it got some gas but the problem I was having before came back so now my fuel is being blocked at the carb.

There's a chance that the fuel I used may have been contaminated & some of the contaminants may have got passed the filter & clogged the jet because I think the jerry can I used to fill up the bike was proabably dirty inside.

Any thoughts on a good way to clean a jet/jets on an HS 142F carb?

 

[darwin]

Do you have an air compressor? If your like me and do not then the best way to clean the carb is with a can of compressed air you use to dust off computers with. Use it to blow through the jets with the nozzle tube that comes with a spray can. Using a wire first to poke through all the holes will help too. Your idle jet is a black plastic piece located below your black plastic idle adjuster screw on top of the carb. Be careful pulling it out it's delicate and plastic. Blow it out best you can. The idle jet hole is so small the only wire I could find in my box to poke through it was a fine brass wire off a brass wire brush. There's 1 or 2 o-rings on that jet, they must be intact when you reinstall the jet. They must also be seated correctly into the grooves that hold them. When reinstalling the jet a lil lube like wd40 helps to ease it back in.......instead of compressed air a can of wd40 with a spray nozzle works too, do it outside cuzz the fumes will overwhelm you inside.

 

[bikejock]

After draining the fuel bowl I noticed allot of bubbles in the fuel bowl drain tube. Does this confirm a clogged jet?

 

[darwin]

If you mean the overflow tube for the bowl then no it does not. Clogged jets usually have a symptom of eratic idling, eratic revs when throttling up, in other words runs like crap. Another thing that helps is to soak carb completely under a cleaning solution when disassembled, then proceed to blow through the jets and use a wire if needed. Gas works if you submerge it. Carb cleaner works, just spray the jets and soak the carb and let it sit for an hour or so then clean it up. Lots of ways to do it.

 

[bikejock]

I broke the jet trying to remove it so I'm getting a new carb. I'll keep the one with the broken jet for spare parts. I should get the new carb by tomorrow. I wish these things were made with better quality parts but the price of the kit would skyrocket. There's a few things I plan on upgrading like a few nuts & bolts & probably the rear drive sprocket.

 

[butre]

I have no idea how you managed to break a jet