Nothing about an aftermarket chain and/or sprockets will inherently make you faster, but there are choices in that product field that offer that - lighter sprockets and chains, which is what folks are trying to steer you away from. There's no reason to throw away money when you can get the same quality for less.
I'll break it down and make it simple for the two things you need to know when ordering:
Your chain is a 530 size - you will see things called "520 conversions", which are lighter. You do not want this, both because it is (usually) a bit more expensive, and it reduces the effective life of the components as a tradeoff for weight. 530 chain is the stock size and best for all-around use.
Your sprockets are 15T front and 46T rear - order standard steel sprockets in this size. You do not need to change size or material unless you want to alter the top speed and acceleration characteristics of your bike.
This link has such a kit with RK brand parts, and is all you need to replace, not upgrade, your drivetrain components.
http://www.sprocketcenter.com/p/651037/rk-530xso-chain-steel-sprocket-kit---yamaha-6001000.html