Motion Pro Flywheel Puller Review 158086, 20mm - Honda CX500, GL500, CX650, GL650
Motion Pro make a flywheel puller for the twisted twins;
Part number 158086:
The puller itself is simply a hardened bolt:
With a solid head; here looking down the hole:
So does it work? Sure does. We use this with a cordless impact wrench to get the flywheels off our CX500s and CX650s, and have had no issues with it at all. If you can find a hardened bolt of the same thread from a local fastener store for cheaper there's probably no reason to go with the Motion Pro bolt specifically; it is, however, of good quality and has survived a half dozen flywheel removals so far with no issue.
If you want one for yourself, you can grab one on eBay