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Custom Sport Bikes | Underdog Motorcycles

Welcome to Underdog Motorcycles! Underdog Motorcycles was founded by Tony David after arriving in Orlando, Florida from Detroit, Michigan.

Underdog’s first custom sport bike design was built in 1995 and as soon as it hit the street, it was an automatic classic!

Soon after, people from all over Detroit started hiring Tony David to customize their sport bikes. Everything from simple paint jobs to full sport bike customizations was performed for our clients in the years to come.

Today, Underdog Motorcycles specializes in sport bike customizations, used motorcycle parts and new custom parts for your sport bike.

Underdog Motorcycles has access to thousands of motorcycle parts recyclers. This resource allows us to help you find that hard to find motorcycle part you’ve been looking for.

Every new custom bike part is CDC machined to ensure a perfect fit to your bike. Using only the best materials available, Underdog motorcycles stands behind every single product as well as ride them every day!

Sick and tired of searching for the hottest and newest selections of sport bike wheels? Well, we have good news for you! Underdog Motorcycles now carries Performance Machine Wheels! These wheels have been featured numerous times on the Speed channel’s show “Super Bikes” and all sport bike magazines like “Super Street Bike” and “2 Wheel Tuner”!

Made of the highest quality materials available today it performs as well as it looks. Performance Machine wheels are currently available in Chrome and Black Anodized Contrast Cut finishes.

Performance Machine has announced two hot new finishes to their arsenal! The New Contrast Cut STEALTH finish on the new Factor wheel and the Contrast Cut PLATINUM finish featured on the Heathen and Torque wheel!

These wheels are sure to make your bike stand out in a crowd! The Stealth look is the cool Factor Contrast Cut Wheel and has a unique flat black finish.

The Platinum finish takes the contrast cut wheel and re-polishes the wheel after it is cut for a shiny black finish. Both of these new looks are stunning and are awesome options for your new Sportbike!

This Kit will allow you to put a 330 rear wheel and tire on your Hayabusa and only stretch the swingarm 4″.

If you have wanted a fat tire but did not want to extend too far, here it is!

This Kit is available in two configurations 4″-8″ and 8″-12″, but that is not the biggest advantage to the kit!

This kit runs the chain outside the frame straight back to the rear wheel. No Jackshaft! This means less parts to wear, less parts to adjust, less parts to break, less horsepower lose and MUCH better handling.

This kit is going to revolutionize the sportbike wide tire industry! Be one of the first lucky customers to appreciate this new technology.

The Outside Drive Tire Kit is one of the most popular items  here at Underdog Motorcycles.

The 330 Tire Kit will make for a sicker customization of your sport bike!

If you are looking for a simple customization of your bike that will make it look like a Million bucks, the OSD 330 is for you!

Remember to contact us if you are looking for a hard to find used part. Visit our used sportbike parts locator.

Now you can see what is behind you with these stylish fully adjustable mirrors.

These mirrors are simple to install utilizing stock mounting points. This means no more drilling your fairings!

These mirrors simply bolt-on with included hardware!

They are constructed out of sturdy billet aluminum and come in four stulish finishes: Chrome, Black Anodized, Blue-Black Anodized and Red-Black Anodized.

They are sure to set off the look of any sportbike!

Support your lowered Suzuki GSXR in style with these new contrast cut billet kickstands! Machined out of durable 6061 aluminum these side stands are available in five cool finishes: Chrome, Black Anodized, Blue-Black Anodized, Red-Black Anodized and Orange-Black Anodized. Available for:

- 1999-2008 Hayabusa
- 2001-2008 GSXR 600
- 2000-2008 GSXR 750
- 2001-2008 GSXR 1000

Quick Release Fuel Caps!

Reduce weight and add to the appearance of your Sportbike with this trick 1/8 turn, quick release, billet aluminum light weight custom gas cap. Available for most late model sport bikes in Chrome, Black Anodized, Blue Anodized and Red anodized, this fuel cap will really lend to the look and performance of your bike. Click below for more information.

- Quick Release!
- CNC machined from lightweight aluminum
- Up to 50% lighter than original
- One eighth turn opening
- Uses original mountings
- Check Valve for proper ventilation