Put the pipe and carb on once you get it broke in and running right.
Install one thing at a time and make it work before moving on.
See if it is an improvement or a detriment.
I've gotta agree with all posters.
It took 3 tanks of fuel to get anywhere near broken in.
You could see it in the rings still having black areas on their face.
Also, I would recommend the AmsOil Interceptor and especially the Dominator 2 stoke oil but not so much their other stuff. The Dominator oil is very good stuff when I tested in my KTM, not so much the Inerceptor, and the other stuff was cheap junk. I base this on ring sealing ability. My KTM 125 EXC is very sensitive to oil quality and makes a good test bed. I am leaning more to 32;1 being the perfect ratio in the China Girl engines but until I get a new cylinder on I won't know for sure. 16:1 or even 20:1 are likely too much oil.
Hey, a pipe change is 38 seconds. Timed myself last night. Just for fun.
Less than 5 minutes to remove intake, exhaust, and cylinder.
You will never get an easier engine to work on.