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Mechanic Experience

We have over 22 years of experience in house to complete the necessary build or repair to get your machine running at it’s best.

Race Proven

Our work speaks for itself on the track. With a large presence in the professional and amateur rankings, TZR has made many trips onto the podium.


We stand behind our work, so if you have questions to further assist in your setup after we’ve worked on your bike, don’t hesitate to call.

Where the evolution of motocross performance never sleeps.

2 and 4-stroke motor work, complete suspension service, basic maintenance, to complete race bike building. 22yrs. experience, all under one roof.

Build Your Dream Bike

We specialize in the services that when combined are unbeatable and rival any aftermarket modification on the market.

  • Top-notch suspension setups
  • Unbeatable engine modifications
  • Thorough bike builds
  • Superior standard bike services

About Us

Our team knows what it takes.

The Illinois based company has countless hours, months and years along with thousands of laps logged at the test track and some blood, sweat and possibly some tears combined to make up the skill set you can rely on when your machine is in our shop. With feedback from some of the top riders in the sport and a passionate involvement with the racing community, Tom Zont Racing has the knowledge to get you set up with what you need for success on the track.

Race Ready

We build bikes for the race track. 

Whether you want optimal performance for your next outdoor season or you can’t seem to stay on top of the whoops in the AMA Arenacross or Supercross series, we can help you. With roots in just about every aspect of the sport, our expertise allows us to stay on top of the techniques and trends in the industry to constantly offer you the latest and greatest products and setup. Our services will have your bike race ready the instant it roles onto the track.

What others say about us

Steven Mages

Honestly, Only modified motors I’ve actually liked and thought were noticeably faster..

Steven MagesPro AX/MX/SX RiderSteven Mages
Jimmy Povolny

I have been working with Tom for about 6 years now. And I say with total confidence that his bike building skills are what helped, and continue to allow, me ride at a high level. TZR builds very fast yet reliable engines, and his knowledge of the inner working of suspension makes for a bike that is easy to go fast on. TZR is truly a diamond in the rough…for now any ways.

Jimmy PovolnyFly Racing/Pro SX/MX RiderFly Racing
Brian Lama

I have used TZR a few times and have come away completed satisfied each time. They take the time to explain to you what work they are doing and never push work that isn’t 100% necessary. When working with TZR, you guarantee yourself that you are getting the right work done and done correctly. Top notch in my book.

Brian LamaCustomerFacebook
Mark Pearson

I say a photo is worth a 1000 words and I have millions of photos of fast riders riding TZR mods.

Mark PearsonPhotographerMX Heroes

Just wanted to say that I am very happy with the work you did (total rebuild)! My 2003 Rm 250 is ripping! Starts well, runs excellent! You have earned my future business!!!! Hopefully, it’s few and far between (bad for you, good for me) but nonetheless, when I need motor work, I know who I am calling. Pleasure to talk to you various times throughout the build. I’ve already thrown your name around to my riding buddies. Keep up the good work and the great customer service. My only issue with the rebuild is: I have trouble hanging on to the bike–I need to hit the gym! Thanks again.

Jason Lonon

Tom bent over backwards to get my bike up and running like it should and worked around the clock! I can’t thank him enough! I was amazed at the amount of knowledge about bikes that this man possesses. We will forever be a customer and no one else will work on our bikes! Thanks again Tom for everything!

Nina Arežina