Lateral gas porting was taught to me by Matt Kneen. He built winning snowmobiles for years and used this technique in them. If you want to read a thread he is in this is a great one.
https://www.mopedarmy.com/forums/read...
I do this to all of my personal builds and see a great improvement with increased compression, lower temps, and larger carbs.
If you want some micro bits, I use these are they are good. but expect to break a couple because they are so small. - https://amzn.to/3sR5vV6
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