Let Mad Brothers ATV Repair Shop put you on the fastest, most reliable race quad around!
MX & ATV Repair Shop
Mad Brothers can build you anything from a local race motor to a “factory” national motor in the Lehigh Valley. We have access to all of the works parts, pieces, and coatings found in most “factory motors”. Every motor has a unique design that is specially suited for that particular rider. Every rider has his/her own riding style and their motor should be able to complement that riding style. We can put the power anywhere you want it, Top end/overrev, Bottom end/torque, you name it!! All engine work is backed with a 100% customer satisfaction guarantee!

- Carburetor Tuning, bcoring and cleaning
- Port and Polish
- Big Bore / Stroker motors
- Custom Cam profiles
- Ceramic Bearings
- Throttle body oversizing and boring
- ISF Transmission Polishing
- MX and TT Engine and Suspension Set ups available
- Motorcycle pickup & delivery also available
- Custom Suspension set up
- Suspension servicing, valving and rebuilds
Suspension Service
Our in depth knowledge of suspension comes from countless hours of testing and developing our product to bring you the absolute best suspension available. Mad Brothers has access to all the high performance low friction coatings and works kits too. We have a quick turn around time, stocking most of the internal wear items and springs. All Mad Brothers suspension revalves are covered by a 120-day suspension guarantee. Our suspension will meet your expectations 100% or we will revalve it at no additional charge. It’s the absolute best when it comes to a refined suspension system!
ATV 4×4
- Full Servicing
- Engine rebuilds
- Plows
- Winch
- Custom Rims and Tires


Proudly Serving: Easton PA | Wilson PA | Tatamy PA | Nazareth PA | Bath PA | Bethlehem PA | Palmer PA | Forks PA | Hellertown PA | Allentown PA | Lehigh Valley PA | Phillipsburg NJ