The part you want is Yamaha #5EL-82305-00-00, which was used on XVS1100 models from '99 till '05. You can research this kind of question yourself, by using one of the parts supplier online databases like Partzilla's, find your machine, find the part, and alternate models the component was used on are listed.
Yamaha Motorcycle 1999 OEM Parts Diagram for Electrical - 1 | Partzilla.com
Yamaha 5EL-82305-00-00 - IGNITOR UNIT | Partzilla.com

Used, take-out parts on Ebay are ~$250 and up. Not cheap in the context of a $300 motorcycle, but not expensive by most rider's standards.

I've read accounts of folks using substitutes when replacement ICUs are particularly difficult to find, but this does usually require:
- Figuring out if input signal from pickup coil and output signal to coils from substitute ICU are compatible.
- Tracking down what each terminal on substitute ICU does.
- Finding mating connectors and splicing them into your harness to connect with the substitute ICU.
- Living with the spark advance curves programmed into the substitute ICU.

Seems like a lot of work to me.

The physical construction of the ICUs for the VStar 1100 and 650 do look very close to me, so maybe that is a good candidate.

1100:

650:

Looks to me like the connectors would mate right up. Still have to verify that the pinout is identical, and that the advance curve for the 650s aren't too radical. Also, the coils on 1100s and 650s aren't the same, so it's not unlikely that the output signal is different.

Did you try replacing or even testing the high voltage spark cables and spark plug caps? Internal connections can get intermittent, and some machines have internal resistors inline that can get wonky.

 

V-Star 1100 Wiki Knowledge Base - Dyna Ignition i think these run around $300.00

 

V-Star 1100 Wiki Knowledge Base - Dyna Ignition i think these run around $300.00

Which module do you recommend for use on a VStar? I don't see Yamaha in the pulldown selections for CDI ignitions at Dynatek. Dyna Motorcycle CDI Ignition | Dynatek (dynaonline.com)

It's pretty typical that aftermarket support gets dropped after a machine is discontinued.

 

Dynatek Dyna 3000 CDI Yamaha V-Star 1100 VStar D3K7-2 Ignition 1999 - 2003 | eBay maybe if i ever need one i could get the part number and call a supplier

 

Dynatek Dyna 3000 CDI Yamaha V-Star 1100 VStar D3K7-2 Ignition 1999 - 2003 | eBay maybe if i ever need one i could get the part number and call a supplier

This does look like a better option than a used take-out, even at $70 cheaper. $316 with a warranty and free shipping beats $250 with a question mark, any day of the week.

 

i took the part number and did a search and it took me to dyna tec,