Motorcycle OEM performance parts?

I don't own a motorcycle yet but plan to in the next few months.
While doing research I had a hard time looking for OEM performance parts for them. Like Honda, Kawasaki, Yamaha, etc.
I was able to find performance parts (exhaust, chasis, brakes) on the ducati website, but can't find any on other websites.

If you don't own a motorcycle yet why do you want to add performance parts?

http://www.yamaha-motor.eu/uk/products/motorcycles/supersport/yzf-r6.aspx?view=accessories#/

Don't know where you are or where you have been looking but this comes up on the Yamaha site.

Hi the problem with OEM parts is they do not always fit the model they should.

Few makers do much in that area other than Ducati. Triumph do some different exhausts for some of theirs. Look for Yoshimura for parts for Suzukis

IMHO, if you have to add "performance parts" you bought the wrong bike.

Unless it's an absolute requirement where you live that you must use factory parts on the bike in order to get it registered to ride, your most cost effective move if you must upgrade is to use reputable aftermarket companies in your quest for better performance. In most cases the factories have you forking over much more money than you would pay otherwise. In my 30 years of riding wrenching and racing, the only factory accessories I have ever bought happened to be Triumph offroad pipes for my 07 Speedmaster, mainly because they have the perfect combination of sound, looks and tune-ability. Tune-ability is key. Peak power is nothing if overall ride-ability suffers, at least on a street bike. The main advantage to buying say ducati performance parts for your monster or whatever is that usually they've done the tuning work for you, whereas building up a repli racer on your own you'll be needing to do your research before buying, as not all components necessarily compliment each other when installed together. For instance a slip on pipe vs a full system, and what jet kit or map would be optimal with that, or possibly risking hurting the motor with a lean condition resulting from improper tuning, or losing a ton of midrange torque for a bit more top end horsepower. In my honest opinion, as a new rider you might wanna fight the urge to start modifying a bike right away and spend that money on good gear and some rider courses that will teach you vigilance and control. The most important and expensive piece on any bike will always be you, and so that's where your hard earned money is best spent.