90cc quad chinese wont fire. New battery cleaned the carb the 2 jets and the little one that is on the float. Compression is fine and spark is fine. It cranks and cranks but will not start. So its getting fuel as i opened the over flow pipe from carb and i can see there is fuel in the bowl . There is no kick start on this quad.. i even sprayed quick start and still cranks but wont fire... need help before i end up bald

Question edited for clarity.
Question moved from motorcycles to ATV model category.

Turning over has nothing to do with the carburetor! Your battery is flat. It will need charging.

If the carb is leaking, it is because the float is set wrong or the float valve needle isn't seating properly.

Engines only need three things to run.

A supply of clean fresh fuel (not sitting a year)
A Spark at the right time.
Compression.

You say you cleaned the carb **in** carb cleaner, as opposed to *with* carb cleaner. Did you strip it down, check the float for holes, clean the jets and needles?

Do you have fire at the spark plug. If so check compression, then if not check fuel system(( carb)

lots of reasons check spark again and fuel to what filter carb? engine problems basically are gas and spark so tells me its gas pull plug squirt some gas 2 stroke make shure its oil/gas 4 stroke gas only in cylinder use a eyedropper or a clear gas line of fuel to put fuel in cylinder put plug back in fire up if starts problem in carb if no start may have jumped timing check air filter may even have a mouse nest in it most people don't drain gas out of carbs for winter drop carb clean bowl with pure white vinegar clean all jets pilot / main reasemble

2 stroke or 4? if 2 stroke definitely jetted wrong choking makes it rich tells me your main jet is too lean (smaller hole) you need to pull carb check jets for plugage clean jets write down numbers check dealer for correct jet size for your elevation if 4 stroke back fire thru carb indicates timing is off or bad intake valves or cam lobe worn

Sounds like it may need some carburetor work. If you've stored it without any fuel stabilizer added, mixed well, and ran through the carburetor a little, even for as little as 30 days, the fuel can break down and leave deposits on the small mixture jets inside. Spraying some carb cleaner while starting and running will sometimes loosen up those deposits, but more often than not the carb will need to be taken apart and cleaned.

Hi Thomas only thing I can think of is that its not getting enough air is it the right filter as it may be not be allowing enough air through. As you probably know if you don't get the right amount of fuel & air it won't run right. Hope it helps cheers Paul

The battery voltage on a Suzuki I had would drop low enough during cranking with the electric starter motor not allowing the spark to be strong enough to run, the voltage regulator also didn't function correctly once and as the battery voltage dropped during operation engine would start to bog down and cut out due to low voltage for the ignition system.

pull spark plug, lay it on engine while still connected and hit starter and see if any spark at plug. if so fuel issue,if sat for any lengthy period of time, pull carb. float bowl and clean bad fuel and resadew, unscrew brass looking jet and make sure clear,{should be able to blow air thru} ensure battery has full charge and should fire.

air filter is clogged or you need to clean the carb make sure you have good carb compression and that your gas is running threw the lines properly

check your compression