I ran a buddy who has a zx14, I'm on the 12. Both of us have muzzy pipes, filter, pc3. I have short stacks, he doesn't. I'm unrestricted, he is still restricted. I have a race front upper, he has the stocker w/mirrors. He has the butterfly or whatever removed.
He weighs maybe 190 vs my 120 no gear.
I was in 2nd, he was in 1st, roll on from maybe 60???? I had 18/44 gearing instead of stock 18/46 with a taller tire that adds 3-4 mph more top speed.
He jumped out (obviously) 3 bikes or so, shifts into 2nd, another minor wheelie but he didn't have to back out of it. By the time I click 3rd we lock up. 4th I reel him in and by the end of 4th I am passing him a few mph faster. 5th put some distance on him for sure.
Either way you look at it, the 14 is pretty torquey but the 12 still has steam up top. Hell ask any Busa guy who's run a comparably equipped 12 up top. The 12s pull hard. No way I would buy a 14. Truth be told I hate Busas and I would rather own a Busa over a 14.
A.