When clutch lever released engine dies

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First of all I can't really start my engine unless I flood the carburetor by pushing the button that pushes fuel out the air filter when it's full. Now I can get it started and it'll run and I could even throttle it but as soon as I release the clutch it dies it will only stay running if I pull the clutch lever and continue press that button on the carburetor.
Could this be a bigger problem with the drivetrain? Chain tension sprocket? I recently put a new chain on and it rode fine for about 19 miles.
I've already cleaned the carburetor took it apart clean the Jets but and everything back the way it's supposed to go.
I also took the cylinder head off and cleaned it installed new gaskets and put a new spark plug in it.
 
I don't understand if it doesn't run unless you keep pushing the primer button and hold in the clutch,how did you ride it 19 miles?
 
It ran fine for 19 miles after I put new chain on. After that is when issues arrived
 
Seems like after I put this engine on a second bike. All sorts of problems. If I'm buying new parts every 20miles. Shoulsnt I just get a newer engine.?
 
Carb has nothing to do with the chain. Your float in the carb may be stuck. May just need to be cleaned.
 
Sounds like it's not getting enough fuel. Is the fuel line clear? Is fuel getting into the carb? Is the throttle cable opening the slide correctly? Do you see any fuel leaks at the carb/intake connection?
 
The engine does not want to stay running when when the clutch lever is disengaged or engaged or whatever the proper term is. As long as the lever stays pulled for the clutch the engine will run as long as I am flooding it with gas. Throttle works. So if it's the carburetor why does the engine die every time I release the clutch lever and why wont it start like normal.
?
 
The engine does not want to stay running when when the clutch lever is disengaged or engaged or whatever the proper term is. As long as the lever stays pulled for the clutch the engine will run as long as I am flooding it with gas. Throttle works. So if it's the carburetor why does the engine die every time I release the clutch lever and why wont it start like normal.
?
When you release the clutch handle and engage the clutch you put a load on it which increases compression. Check your crank case seals and look for air leaks at the carb/intake, exhaust, and head gasket connections. Start the engine and disengage the clutch (hold the clutch handle in) and set the lock to keep it from engaging, now rev the engine and feel with your hand all the way around the head to see if you can feel any air shooting out from anywhere around where the head and cylinder connect. I've seen stock heads become warped from the heat and create huge air leaks in the past. The leak will not be big enough to cause a no start condition but when you put pressure on it by engaging the clutch it leaks out.
 
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Thankx I fixed it. The metering pin inside the throttle assembly came off and was floating freely in the hole for the carburetor.
After dismantling carb and cleaning it. I disconnected throttle and clipped the w on middle notch. Squeezed with needle nose carefully not bending it then simply put throttle assembly together how its suppose to be. And carb back on bike.
Runs fine. Except need to adjust chain tensioner again.
 
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