Re: Topped out at 30mph what to do now
The rocket racing cdi is the same one that's sold on eBay, I have one, it blows the stock cdi out of the water.
Let your engine break in, mine hits 30, all I did was open the manifold and exhaust ports. I haven't touched the jug, slant head with ngkbh6.
Get about 200 miles on it and then tune your carburetor.
That high compression head and carb should yield at least 40mph at your weight