Motion Pro make a flywheel puller for the twisted twins in the 08-0086 (found on eBay US, eBay UK, eBay AU, eBay CA, Amazon);
M20x1.5:
Part number 158086 or 08-0086:
The puller itself is simply a hardened bolt:
It’s hollow:
With a solid head; here looking down the hole:
So does it work? Sure does. I 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 across five years and dozens of motors. 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 is readily available online which may be more convenient than finding a fastener store) and has survived so far with no issue.
If you want one for yourself, grab it on eBay US, eBay UK, eBay AU, eBay CA, Amazon!