Ok my chain and sprockets are finish on my 06 Busa. I'm thinking of changing my sprockets size and maybe go with a smaller chain (520). Should I go 2 extra teeth in the back sprocket and 1 less in front or just 2 more in the back. I don't mine loosing a bit of top end, will I still be able to hit 186mph? I do mostly road riding and go on a track for top speed runs. If anyone has a better suggestion let me no. What size should I go with the chain 520, 525 or 530? What manufacturer do you recommend for sprocket and chain. Also should I change to a aluminum sprockets or just stick with steel not to get any warped sprocket. Thanks for the help!