ResultOne Racing Technologies
- Motorcycle suspension tuning with the Personal Suspension Assistant (PSA).
- http://www.resultone.com/

Hot Bodies Racing
- Yamaha, Suzuki, Kawasaki, Honda, Ducati, YZF-R1, YZF-R6, gsxr, seat cowl, undertails, racing bodywork, fiberglass.
- http://www.hotbodiesracing.com

Tony Foale Designs
- Information on motorcycle chassis, frames, suspension, forks, aerodynamics, steering. Source for the book "Motorcycle Handling and Chassis Design" plus loads of articles and photos.
- http://www.tonyfoale.com/

Bike Tweakers
- For motorcycle owners, mechanics, tweakers, and racers.
- http://www.biketweakers.com/

Debben Performance online speed shop
- Motorcycle performance parts online like Nitrous Oxide Systems, Vance & Hines, Wiseco, APE, MRE, Turbo , dragracing to sportsbikes like the Honda Fireblade, Suzuki Bandit, Yamaha R1
- http://www.debben.co.uk

High Performance Tuning
- Engine builder and tuner George Grabowski's machine shop service and two stroke tuning school. Articles, advice, contact information and customer recommendations.
- http://www.hpt-sport.com/

Replika Maschinen, Inc.
- A high performance two and four stroke cylinder head porting and air flow facility. They also apply "Thermal Coatings" to cylinders and related components.
- http://www.replikamaschinen.com

TTS Performance Engineering
- All the goodies you can imagine plus on-line ordering.
- http://www.tts-performance.co.uk/

Nitrous Express
- Nitrous Oxide systems, parts, sales and service. Location and contact information available.
- http://www.nitrousexpress.com/

MR.TURBO
- If you want a kick in the pants from your bike, run a turbo.
- http://www.mrturbo.com