Dies when throttle is let off

[jonathan180iq]

If your bike was popping on shut off and was exhibiting other symptoms of being lean, then I would wager that you have an air leak somewhere in your intake system (or a clogged jet) and it's not letting the bike do what it needs to do to run properly.

I would inspect all vacuum hoses, the condition of the carb inlet and exit boots, and ensure that the mounting flanges that connect your exhaust to the bike are all secure. Once that is done, move on to the carb issue.

If you spray starter fluid into the chamber directly, can you get it to fire? If you can, then you know you have a fuel problem.