Hi Dave
Sounds like you are running out of gas (too lean of a mixture).
First thing to do is make sure the carb is clean (jets and passages), the float
bowl gaskets are not leaking (if they leak air it will cause a lean mixture)
and all of your hoses going to the carb, fuel pressure regulator, enrichment
solenoid,
airbox and all transucers are not pinched or leaking.
Make sure the slide in the carb is not binding and the diaphragm is in OK shape.
Also do a mag check at flat spot, and apply choke at flat spot and see if that
changes anything.
Be careful reassembling choke parts, mark and take pics before you disassemble.
Good luck.
Ron Parigoris
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