G'day jfligg,
Great to see another Cafe, I luvem. I really like the tank and yolks. Isn't it good to build one as you want rather than looking at pictures and parts books. It can still retain its old skool charm but make the moderns take notice. They do pull a crowd at the pub.
You are right in using a stock flywheel for better low/mid range and say 8 1/2 or 9 to 1 pistons. Do you know the specs on the cam ? What carbs are you going to use ? I got a pair of PWK 30's and were jetted pretty close out of the box.
Good work, keep us posted.
Cheers