And you are a guy that doesn't mess around with the basics...you go right for the throat when it comes to getting aftermarket goodies for your bikes....The comparison question ( if you read it ) is how a Gen 1 compares to a ZX14R , and both stock .. The stock Gen 1 was fast in 99 and more , but it is now 2024 , is regarded as mild rather than wild ride . A number of modern , smaller cc bikes , also stock , will mostly match it ... but that is progress .
I agree the ZX14R wouldnt be most people choice for a hills bike , but if you are over 6 ft and dont fit on the 1000 supersport bikes , then your options are more limited . I found both the Busa and the ZX14R to be great fun projects , getting them both to carve corners pretty well , but a 1000 for example will smoke them in the curves . That is why they make GSXR1000 and ZX10R .
As for the Gen 3 Busa , that would also be only an option for curves if you feel your choice was limited by size etc. , imo . My mates stock Gen 3 was nice to ride , and would be great with my own Busa at that time running gear etc . but not worth updating to from Gen 2 imo.
I actually maintain , that the Busa will suit certain riders style over the 14R , and vice versa . But for me , the 14R is the better bike .
You stated you havent ridden a 1441cc ZX14R , some I read ..., well they improved a lot of things , to tweak it to beat the Gen 2 , so if you actually rode one you might be surprised mate .
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In the day, the Hayabusa and ZX14R were in direct competition after the Super Blackbird went the way of the "Dodo" leaving Kawasaki and Suzuki with the only two "hyper bikes" left....now Kawasaki has basically ended the ZX14R in most markets and replaced it with the H2 platform which has taken the throne as the Hyper bike king.
Both bikes suited each other as competitors should....
Now if Suzuki would have teamed up with TTS and made this a production option....all bets would then be off as the Hyperbusa would have perched itself on the throne and dared anyone to try and knock it off.....
.......if only.......