I had a "motorbike" when I was 14. My bud had a Briggs in his bike, and I had a 1.5hp Power Products 2 stroke running on the front wheel through a stone. Another bud had a Whizzer that was ratty looking but had legs on the rest of us. So over 50 years have gone by with me building cars and boats, and racing same. I'm going to build a couple bikes now. Plenty time on my hands.
The main build will (ultimately)be a Phoenix Bike works frame with a Whizzer. I'm going to build it with a legal 50cc Honda and EZM box to get through my States regisration, and then 'repower' it with the Whizzer and use the EZM/Honda to power another bike, getting it registered as well.
As I want the best pieces in the Phoenix Bike I'm bying Worksman's wheels. I thought I'd just get a Worksman Bike for the other rig but have heard that the frame may be too tight for a 4 stroke. Has anyone done one? Do they need to be "massaged" to get a 4 stroke fitted?