What everybody , who understand the physics of a two stroke engine does.

First, you test a stock engine extensively to get a feel for the stock performance.
Then, you determine where the engine is strong and where it needs improvement., i.e. does it have a lot of torque or more top end power.

Then you you put a degree wheel on the engine and measure all it's ports (crank induction, boost, Schnürle and exhaust)

All this information will give you a pretty good idea how to change the timing to improve the weak points of this engine without destroying the fuel mileage.

Now you modify the engine and go testing again to see if reality confirms your theories. If everything works as you want it to, you document what you did and you are ready to modify this particular engine type.

If not, you go back change the timing even more and go back testing.
if you over did it, you take the next engine and start over.

This way you will, over a long time, accumulate a lot of knowledge and a database, which will help you to get to a good result with less and less testing.

As you can see, to get to this point, you will have invested a lot of money and time and this is the reason why no engine tuner who knows what he's doing, will ever share his knowledge with you, or show pictures of his work online.

When Uriah and I started modifying engines, Richey mods where about the only .12's available.
Our first thought was to get one and copy it. We did get a few clues, but it took quite a long time before we understood what we were trying to do.

To me, EdwardN was a great help. He explained engine theory to me, because we are good friends.
Without his help, I would have probably given up and started buying modified engines.
Here is a quote from Edward: Sleeve cuts and polishing is for fools.
The engines I have seen from him looked as stock as any other engine, but the were beasts.

Ok, of the soap box now....