Ran bike ‘07 deluxe home from work yesterday ran great shut off went in house for about thirty minutes went to start bike and it would not start unless I twisted about half throttle then acted like it was running on one cylinder only stayed running as long as I kept it at half throttle or more. Would not idle could this be fuel pump

 

Could be the fuel pump, but it could also be the fuel lines in the tank. They can get pinholes and result in low fuel pressure. If you can't check the fuel pressure, look in the tank and prime the pump. You may see or hear spraying on the tank wall.
When was the fuel filter last replaced?

 

With that age, I would replace everything in tank at some point, regardless. But that is just me.

You hear the fuel pump pressurize when you turn ignition on? As said testing fuel pressure is probably the thing to do.

Problem is, a big with my myriad of issue may chug along when given some throttle. Spark, fuel or mechanical.


Have you tried starting it today, now that it is stone cold? aCould be electrical item that cooled. How much gas in tank? If under half, fill it up, and see if it behaves different. If it does could be a hole in line or issue with pump or filter.