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I had my wheels removed from '14 VFR and powder coated them pearl white to match my VFR. They look stunning off the bike. Awaiting my newly Powder coated wheels is a brand new set of Michelin Road 5s. The set I had on I sold for $200 Canadian. 50% tread left. Not bad. Will post pics once mounted on the bike.

So I did a load of digging into this when I did mine. 4 hole from many car tests are much better than single hole, but 12 hole is more the norm, but the step up is not the same as 1-4 when compared with 4-12 but 1-12 is better. Some newer injectors are 16 hole. CBR600F4 & CBR929 injectors are the same 4 hole units with the same connector as 5th gen, just use the 5th gen mounting washers & remove the plastic orientation stub, which 5th gen does not have. But are designed for higher pressure. I tried with VFR regulator & had to add loads of fuel. I then tried 4bar, but was to much. So switched to 3bar & its great. I run 14.2 AFR on my RBR + MTB, runs clean, better MPG & no over heating even in silly 33c temps. The early Hayabusa used the same injectors as the 5th gen. You can buy fairly expensive Hayabusa aftermarket units, 12-16 hole. The simplest upgrade is a 6th gen throttle body, plus airbox, bottom half will do, as tops are the same. Just switch the TB harness at the large multi block that you tap for PC3/V or RBR etc. I can't guarantee the pinout is the same so consult a wiring diagram first. 2014+ 8th model looks the same as 6th gen, but I've never compared them in the flesh. YMMV A few people on here with 6th gens with 5th engines installed have reported better mpg with PC or RBR installed. The one advantage of the single hole pintle injector is that its effectively self cleaning & very hard to gum up. The tiny multi hole units are much easier to block. Hope that helps.