Well on second thought, as good as it's running (and the 4 stroking is very minimal, almost barely noticeable), I think the needle should stay where it is. I watched an "LA Hover Bikes" vid on it, he seems to think minor 4 stroking like I get is normal and not a problem. LA Hover Bikes is probably my favorite INFO YT channel There are other good ones, but I find many tend to go on too long about whatever, be too "I'm right and everyone else is an idiot" arrogant. LA Hover Bikes just shares what he knows and seems to really help others enjoy the hobby without that swelled head or overlong explanations some of the others give. I really appreciate that guy...
Mine only does it just a bit at the bottom of the throttle and a tiny bit just under full throttle.
I'm actually amazed at how well it pulls low speed. I do have to pedal to let out the clutch, but not much. Even at like 8mph, the little engine lugs along and slowly picks up RPMs. Seems like it runs at lower speeds than most motors can. I mean it's not happy that slow, and there is vibration, but it's not awful, doesn't sound like it's hurting anything, though it probably is difficult on the clutch.