I don't know why you didn't get any instructions with your flywheel, you should have received some, but you are not the first person to mention that to me, so I will check into it.
We do have an 800 number listed on our website, with a contact us page with email info.
Plus, there's this website, which I built to help with questions just like this.
My phone number is 800-521-3560
My email address is tom@arcracing.com
And if you ask for me directly here, one of these guys will let me know in a hurry. PLEASE don't hesitate to contact me with questions or problems. I promise I'm not a mean guy (unless we are on the same racetrack
) and I will try to help you.