camlifter, you have a few miles to get it up to speed. the short course is 4-5 miles; how_it_works
so as long as the bike will run, even under pedal power, there's no reason to get there quickly.
no matter what gear your running, a china (or morini, or other) will get to the timed mile in less than 4 miles.
just ask the budfab crew:
YouTube - Bonneville Stories Part VII "BUDDFAB 50cc 150 MPH Streamliner"