Mass: Could I ask how tall you are?
I'm 6'1" and 175 lbs. in shorts.
I have Vortex rear sets on my track 750 but would highly recommend not using anything with hard pegs (bolted with no flex) on a zx14 due to the limited lean angle and the higher chance of dragging hard parts and resulting in a low-side crash. Mine has the rear lifted with a shock spacer, longer dog-bone linkage, re-machined axle slot (my rear axle is 28 mm), taller tire (190/55) and much stiffer rear shock and I still managed to drag the clutch cover last time I took it out. I was also scraping my toe sliders too much with the oem rear sets on the highest/ furthest back holes on the plates from the link I posted and I also yanked the cruiser pegs long ago for a set of Oberon pegs in race cut profile.
I can't find a better pic, but this is at Monticello NY a few weeks ago (second rider on the grid) and you can see where my toes are on the Vortex rear sets and that's not achievable on the 14
If you go down, aftermarket rear sets will protect the bike much better,
just can't be the cause of the crash.
Mass, any way you could take a closeup picture of your rearsets?
I'm out of town but will take some when I get back,
we're riding at NJMP on Mon and Tue (Thunderbolt both days).