Findings:

Here's the stuff we found when you searched for "racing motorbike"

Agapio Racing Team
Joe Gibbs Racing
A.G. Dillard Racing
Bill Davis Racing
Sonic Drift Racing
Diddy Kong Racing
Roof racing
racing harness
Project Gotham Racing
Horse racing is inhumane
Standardbred
Donkey Kong Racing
Arlington Horse Racing
road racing
bracket racing
Virtua Racing Deluxe
Virtua Racing
bumps racing
seat racing
World Leech Racing Championships
Super Bombad Racing
racing slicks
College Ski Racing
Project Gotham Racing: Mobile
racing kings
drift racing
Getting the Most Out of Motor Racing
How to build a Showroom Stock Racing Engine
racings (user)
racing (user)
AG Racing (user)
Jak X: Combat Racing
racing line
adventure racing
Love is like racing across the frozen tundra on a snowmobile which flips over, trapping you underneath. At night, the ice-weasels come.
Why I love racing
Project Gotham Racing 2
Total Control Racing
racing bike
Greyhound Racing
Hard Drive Racing
Michael Schumacher Racing World Kart 2002
Horse racing betting
Robert Yates Racing
pod racing
auto racing
Drag racing
Mind racing, a while back
harness racing
British Racing Green
kayak racing
Racing stripes
Mountain bike racing
horse racing
racing
Motorbikes and horses don't mix
To park your motorbike illegally, and to get away with it
The Motorbike Track
ashtray on a motorbike
Why do women like motorbikes?
motorbike
Sailboat racing
Crash Team Racing
Team racing
Why racing the elevator isn't a good idea
British American Racing
Drag Racing Basics
pigeon racing
Racing friends with fragile self esteem, or: A good way to get yourself killed
Air Racing
racing colors
cubicle racing
cow racing
Slot Racing
Racing to the Point
Racing Mars
Racing flags
At Least There is Racing
Racing simulation
The Future of Computer Simulations: racing sims
Racing Demon
Slug Racing

If you Log in you could create a "racing motorbike" node. If you don't already have an account, you can register here.