This is a Yamaha blaster.  It is a racing quad, one of Yamaha's finest.
Unfortunitely, I cannot tell you anything about the top speed, I do not own this particular model.
This is a Kawasaki KDX 200.  A good bike that has powerbands stock.  Very reliable, If you're into dirt bikes, you need to get a KDX!
This is the quadzilla. They now range from a minimum of 60cc engines. The newer models use an electric start with kick backup, but the older classics have kick.

Since the quadzilla's high compression engine generates a lot of back compression, the older ones came with an electronic backfire resistant control whitfch allowed the usedr to start the machine without getting a busted shin from back compression.

Now the quadzilla has reached a new generation for young riders who just aren't up for that beasty power yet.
The raptor, probably the most talked about machine in today's ATV world. The most popular model is the 660 which is cooled via forced air. These quads come fight off the line to do one thing, RACE.
Polaris predator, the new monster straight from Polaris, a racing machine.
I am offering the same options here as on my new car page, if you have a specific pic of your 4-wheller doing someghing cool, get the picture into FPG or GIF formats and send it to me by clicking HERE.  reply message will be sent to you when the pic has been placed on this site.
To avoid damaging the gear box on your machine, try to limit the dimes when you power shift. Even though you might need to do this going up a steep hill, or just to show off, it forces the next gear and will eventually chip teeth on it.

If you want to bang gears, let the clutch take the the hardnss, that's what its made for.
For new riders, power shifting is when you shift into the next gear without disengaging the clutch.
HELP ME OUT WITH SOME PICS OF YOUR OWN QUAD. HAVE        HAVE SOMEONE TAPE  A SHORT VIDEO OF YOU DOING SOMETHING COOL.
THEN YOU CAN SEND IT TOMME BY CLICKING ON THIS LINK.  Send Pix
QUAD PAGE