Here's my actual cafe racer
I built it for 24 hour racing. Heavy flywheels (MSS) balanced by Dodkin for smoothness, medium CR, and a ported 350 head to get a straight but small bore for the carb. Stoned the cam followers to change the lift characteristics. Flat out at 108 but could hold it almost anywhere. Nothing could stay with it around Loch Ness because the handling was pin sharp so I could hold my speed longer.
It never did get to a 24 hour though. I never had enough money for the travel and entry fees.