Please help!

[Condor]

Hey guys, I’m new here, just got my first bike. After some fiddling, I was able to get it running (although not well, and only when riding, no idle) it was producing its own power and would propel me. I was riding it and then all of a sudden it just died down and shut off. Now I haven’t been able to get it to run since. I’ve got spark outside of the block and it’ll run a bit if I pour into the spark plug hole. I’ve got compression (135 psi with a compression tester), the carb bowl is full, the cylinder/spark plug is wet after I crank it around. I don’t know what to do. I’ve tried all of the needle clip positions, I’ve tried various choke positions, I’ve tried different gasses (85 and 87 octane each at a 20:1 ratio) any help is appreciated. Ill post a video of me cranking it too if that helps

 

[Cannonball3]

Look for an air leak at the carb or intake. Generally if it runs by priming the cylinder its got an air leak
some where. Hopefully not a crank seal. Check the head for being loose also.

 

[mony0_3]

Did you remove the carb bowl to see if the jet is loose?

 

[Condor]

Did you remove the carb bowl to see if the jet is loose?

When I had it open yesterday it was tight, but I’ll check again

 

[Condor]

Look for an air leak at the carb or intake. Generally if it runs by priming the cylinder its got an air leak
some where. Hopefully not a crank seal. Check the head for being loose also.

how do I check for an air leak? It will be sucking air into the leak so I can’t use soapy water, right?

 

[mony0_3]

Which engine do you have?

 

[Condor]

I’ve got an 80cc two stroke of the seutek variety. Also the heads are tight. I torqued them to 12 ft lbs last night

 

[Karl Snarl]

Probably at the carb, where the the neck is, or at the manifold where it meets the cylinder.

 

[Axl Myk]

I had that happen. I loosened the gas cap to relieve the vacuum in the tank. Drilled a very small hole in the top of the cap.