Flywheels can be a PITA sometimes but it is basic follow the advice above. I used a harmonic balancer puller I had but one can rented for free w/ deposit at local auto-zone, advanced, pep boys etc. You will need to buy long bolts from homedepot/lowes etc most likely. Take your time, snug it up tight and let set 15 min, tap draw bolt w/ hammer few times and tighten more, wait & repeat. It WILL pop and make you think something broke

Get high grade bolts

Below is pic of when I did my polaris