2011 ZX-10R. Black bikes matter!
Yes, the Gen 4 uses the wheel sensors to calculate speed, so altering the gearing will not affect the cluster.No will change to a 520 chain. I also read that the gen4 has the Speedo and Odo on the wheel so I won’t need to install a Speedo healer or any thing like that. The correct? And yea I think ima pull the trigger on it and if I don’t like it I’ll jus buy a stock size sprocket and go back down to stock. No biggie!
I would also caution against the 520 chain conversion. The weight/rotating mass decrease is quite small, while the decrease in durability and longevity can be considerable. For a racer looking to gain an advantage by shaving every ounce, they can be worth it, but for a street rider the 525 is the way to go.
Also, if you are considering aluminum sprockets, dont. They absolutely suck in terms of longevity on these bikes.
On your front sprocket, I'd highly suggest buying the rubber cushioned version. They help considerably in damping chain induced vibrations.
As far as brand, may I suggest JT sprockets? I currently have a set on my Gen 4 and have used them on multiple other bikes. Their prices are reasonable, they seem to last forever, and usually you can find them on Amazon with free 2 day shipping.