What is the recommended sprocket kit for a hayabusa?

Change them for what? You want different sizes? Brand? Are yours worn out?
As long as you stay with 530 size(width) you'll be ok. Going to a smaller 520 is not adviseable as the busa has more power than the 520 is recommended to handle.
Changing the amount of teeth on each depends on what type of riding you prefer to do. Stock sizes work well for most anything. Gen1 is 17/40, gen2 is 18/43.
There are several good brands to choose from also. You can get rear sprockets in aluminum or steel, and steel will last longer. You can also get some brands in different colors.
If your sprockets are worn(sharp, worn down, or broken teeth), then you need a chain too. Unless you plan on taking your bike somewhere you'll also need a good chain breaker/press tool. It's also adviseable to get an extra masterlink, if you mushroom the pin heads too much on reassembly it's easy to ruin them. A clip style masterlink will work, but most of us prefer the press type. If your chain breaks from being installed incorrectly it can cause alot of problems.
Site sponsor Pashnit can get you quality parts and tools and is great to deal with.:thumbsup:

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Ok, I changed it out because I stretched the bike about 4 inches. Me and my friend kinda compete for leader in the pack and he has a r1 with a small sprocket up front and about 2 teeth a more up in front and he always beats me
 
im running 16/40 on my gen 1

its quite nice while not sacrificing to many RPMs for cruising
 
I want to change my stock sprockets and I want to know what is the recommended sprocket kit for it.

Ask three people, get three answers. Also depends your budget. If you need low cost, get Sunstar (stock replacement), Vortex or JT Sprocket. About 5-6 brands like that.

Many of us here have the SuperSprox. They are bit more in cost ($90), but handle the horsepower of the Hayabusa better with longer life. With chains, buy quality and buy something equipped for the horsepower (again). Many of us run EK or RK chains.

And changing teeth is whole 'nother topic. ;)

Here's our SuperSprox kits:


I changed mine out a couple days ago. :thumbsup:

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Didn't like the look of the worn stock silver nuts, so sourced some gold ones.

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