Carb tuning, larger accelerator pump nozzle?
Here is this article. It’s a good one. I’m going to have to look for the other one. Thought I had it saved. Maybe
@Mattax
will see this and post a link to the paper.
https://www.jstage.jst.go.jp/article/jsme1958/11/46/11_46_691/_pdf/-char/en
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