Just found another video:
Thanks TJ. And yes, always room for improvements. We learned a lot from GoPro, and we’ve got plenty of ideas from the data from New Castle. Fun stuff!
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diff tyres and diff track conditions
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Just bringing this quote back since the recent FIA-karting stuff
Some OK-N action around Cremona in Italy, from Pasiewiscz, who is a LenzoKart /LKE’ official driver, on used Vega XH4. 
For reference, X30 fastest lap time during the Final of the 2023 IAME Series Italy on the Komet Prime tire in Cremona was 50.1
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Oooof seems “boggy” on the bottom end. Looks fun though.
You think so? There’s only that annoying left hand hairpin in the last sector of the track which is low speed and the engine doesn’t like that much, but i feel that sound wise, you can tell it pulls away rather well from everywhere else 
“boggy” is very subjective too, to be fair.
To me this is one spot where it does seem boggy. Gearing may not be optimized, but either way it looked good everywhere else.
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Fast forward to 3:21 to avoid the endless pit walk 
Limit at 14,5?
Limit at 15k. Carburation is rich on the bottom end (from temps).
He’s missing about 250 rpms more or less at end of straight.
Gotcha thanks. Like to see it on a shorter track, more tightly geared. How’s the bottom-mid compared to x30? How does it pull? I’m unlikely to ever rent one since I don’t do that sort of racing is why I ask.
Wait, and miss the nice rolling kart stand inside pass at exit of the 90-degree right leading onto the grid? 
.
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It was a nice turn indeed. The pit walk is under-appreciated.
I would prefer music and we dance our way to the grid and then athletically jump into kart doing a handstand flip or whatever. Totally shut the other guys down by back-flipping into the seat or something
From real life visual experience, the OK-N has slightly less bottom end than the x30 in really slow speed corners ( bellow 7K rpm) but completely annihilates it in the mid and top end range, which is where the lap time difference is made vs the X30
@Christian_Fox will be able to tell you more I suspect, based on dyno graphs
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Simone is correct; vs the X30, after 8k rpm, the OKN just takes off. The OKN makes 6-7 more hp than the X30, so after 8k, the slope to peak hp is much steeper, and it stays closer to peak hp longer than the X30. The X30 has a more peaky powerband. When on track together, when the OKN is on the pipe, it looks like a video playing at 1.5 speed vs the X30.
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Sounds like a sexy engine, then. The x30 top end with some rotax mid pull?
It does not have the final top speed of an X30 at tracks like New Castle (highway-like straights) due to the limiter, but the OKN arrives at its own top speed much faster, if that makes sense. We raced both the Rotax race and the OKN Stars race at Pitt last year, and we were 1.5 seconds faster per lap on the OKN.
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If anyone wants a KartPulse test of an OK-N, I’ve got a chassis available and can provide a writeup, a video, and return shipping.
Worth noting Champions of the Future are calling their Academy Junior & Senior classes with an upper age limit of 17 (!!!) OK-N. It’s not OK-N, and I am surprised the FIA haven’t stepped in due to nomenclature being the one thing they should have a very tight grip on because that’s their stock and trade. It’s a IAME Spec series. You can’t call something that describes a set of Technical Regulations when it doesn’t adhere to them. I know it’s pedantry but these kind of things can steam roll perceptions and expectations of a class pretty quickly.
I feared this would happen and it will undermine the OK-N project and the FIA Homologation process entirely.
@Simone_Perego thoughts?