2002 yamaha 650 vstar, 20,000 miles. it won't

if the bike is fuel injected- the pump is in the fuel tank.. if the bike has carburetors- there is normally no fuel pump- the fuel gravity feeds from the tank thru the petcock valve into the carbs

Remove the drain plug at the bottom of the rear hub ( have oil pan ready in place so oil doesn't drip on back tire. Remove the bolt on the side of that hub unit then replace the drain plug. Fill the hub unit with a hypoid gear oil (80w90) to the top of bolt hole. Then replace bolt. Do this every 3000 miles.

I would guess that the tires need balancing. There is a product you can buy that is a bunch of little BB's you put in the tire that will balance it. I have not used it so I would recommend taking your bike to a tire shop and have them balace it for you.

All the symptoms you describe point to a carburetor overhaul and float valve replacement.

If you are not getting spark then it would be the CDI box, Coils, Pickup trigger in Engine.

Twisted bolts on the starter are never a good thing. There is also a one-way starter clutch on the crank behind the flywheel that can be damaged. If it engages intermittently, it's on its way out. Both the starter and starter clutch are prone to failure on VStars... and neither are cheap to fix. Hopefully your bike is still under warranty.

your fuel pump suppose to Hum and gently vibrate only when working normally, clacking sound would only mean that it is having a hard time or inconsistently supplying gasoline into your engine. Have it checked and see if any improvement would happen.