Looking good
We went for the ContiGo tyres and they made a huge difference over stock.
Quick question, when you added the 70cc kit, did you get the full kit with replacement carb? If so, did you have to adjust it at all, or did it work out of the box? Also, I don't suppose you took any pictures of where the CDI plugs in?
When I removed my exhaust and blew through it, there really didn't seem to be any real restriction. The garage I used for first set up shoved a big rod up the back of it, so maybe that cleared it?!