Good Work
Is that a 3 cylinder engine? Your Idle rpm seems to be not less than 1.1k, Why it is so, is that a cold start?
In my A-star, ma tacho flies only upto 5k. Ya im not mistaken its 5k itself. After that it sounds boooooomboooooomboooooom. Does it sounds funny
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But in your case it doesn't hesitate to go beyond 6k. Have you done any other mods?
In my knowledge its the protection given to the engine by not letting it to revv in the dangerous region.