In Shop Harley-Davidson Services

Fat Head Cycles, located in Thurmont, MD (Frederick Country) provides our customers with a comprehensive range of Harley-Davidson® repair, maintenance and custom motorcycle services. All our in-shop work is performed by our highly experienced Harley-Davison® motorcycle specialists. Whether you own a classic bagger or a late model touring bike, your ride will receive the same care and level of attention we give our own because we share your passion for the road and the Harley-Davidson you ride.

We’ll quickly and efficiently address any type of modification request, install or repair any problem on your Harley-Davidson. In addition to providing you with superior custom work and performance and audio upgrades, we perform expert diagnostic tests and repairs and help you keep your bike at peak performance levels by working with you to create a scheduled maintenance program.

Years of hands-on experience and a love for what we do combined with the best in advanced Harley-Davidson technology allow us to offer you outstanding customer service and a finely tuned level of improved motorcycle performance. If you have any questions or special requests, please don’t hesitate to call us at 301.825.9007 or simply complete the form at the bottom of this page. 

The Fat Head Cycles Team

We’re pleased to offer the following Harley-Davidson service options and more:


Boosting the performance of your Harley-Davidson is one of our specialties at Fat Head Cycles. Let’s face it, Harley owners are rarely satisfied with the performance of their bikes when first rolled off the showroom floor. There’s always that need for something more powerful, more responsive. There’s a way to satisfy that need by making upgrades to your ride one step at a time. Every step is precision designed for easy installation without any alterations to the bike or engine.

Fat Head Cycles Shop

If you have a newer Harley and are considering performance upgrades, this process can be done one step at a time by our technicians at an affordable price. The first step is installing certain key components that will immediately increase the torque, throttle response, and horsepower, airflow and sound of your bike. These additional upgrades will increase that power. This gradual series of specific installations will seriously increase your bike’s performance even further without having to make one large investment. Of course, we offer you the option of completing the Stage I and Stage II upgrades on your own by opting to purchase one or both of our complete upgrade kits. But if you want impressive results right away, give us a call, go for it and get everything installed at the same time.

Our Stage I bundle package, available with black or chrome covers, includes all the specifically engineered parts you need to boost performance on your 2017-2021 Harley Milwaukee-Eight.

Our Stage I and Stage II upgrade kits include the latest products from D&D, Arlen Ness, ThunderMax and more highly respected motorcycle parts designers and manufacturers. Here are some additional upgrade parts and options:  

  • High Flow Intake
  • Exhaust/Full System or Slip Ons
  • Fuel Management Installation (ThunderMax, Power Commander, Vance & Hines Fuel Pack)
  • High-Performance Cam Shafts
  • Big Bore Kit
  • Ported & Polished Cylinder Heads


Adding a new audio system to your ride or upgrading your existing system is a specialized skill – one the expert technicians at Fat Head Cycles have perfected. Our audio systems and products are designed for Harley-Davidson motorcycles, and we strive to outperform our competitors at every price point. All of our audio equipment is built to be heard loud and clear, at highway speeds or in heavy traffic, even with no windshield and straight pipes.

Sony XAV-AX7000 Harley-Davidson

Our plug and play receiver units and audio bundles work seamlessly with your factory-installed wiring harness and connectors to provide you with the best possible reception while protecting your Harley-Davidson® warranty. All our receivers feature full-color, ultra-bright displays with day and night modes and oversized buttons for easier control.

If you’re a hands-on Harley owner, our front audio kits are complete plug and play installation systems that include a power amplifier and direct-fit speakers. Installing our kits involve no drilling or cutting – they bolt directly onto the factory-installed attachment points on your bike. All our kits include everything you need to start rocking while you ride. Here’s a look at more of our audio options:

  • 2014 & Up Radio Flashing Units
  • 2019-2021 Apple CarPlay Enabling w/o Headset
  • Head Unit Replacement
  • Speaker Replacement
  • Amplified 2- to 10-Speaker Stereo System w/o Cutting Factory Wires
  • Cutting 6”x9” Saddlebag Speakers in Factory Lids
  • 7-inch Double Din Touchscreen for ’99-’13 Batwing Bikes

When you want a cranked-up sound system that won’t compete with traffic conditions or the pipes on your custom ride, big wheel or bagger, no matter the speed or riding environment, look no further than Fat Head Cycles!

    Fat Head Cycles


    Every Harley owner wants to personalize his or her ride. If you plan to put your own stamp on your motorcycle – go no further! Fat Head Cycles offers a great range of custom options, including new front wheels in a variety of styles and sizes, bright LED brake and underbody lights and turn signals and new grips and footpegs.

    Do you want to swap out your factory handlebars for an aftermarket set that fits your taste and makes riding more comfortable? We can do it. If you want to add more chrome or black out your bike, we have the options. Fat Head Cycles can also help you choose or customize extended saddlebags for better storage options or install custom fenders on your Harley. Speaking of comfort, there’s nothing like a new set of custom floorboards to add luxury and personality of your motorcycle!

    Some of our custom options include removable radio covers for '14-'21 touring models, a '96-'13 Metra 95-HDIF inner fairing in matte or gloss black for ‘96 – ‘13 Electra Glide and Ultra Classic and ’06-’13  Street Glides, or a custom stretched gas tank for Harley ’08-’16 baggers or dressers.(FLHT ad FLTR). We also offer our customers the following customization choices:

    • Aftermarket Handlebars
    • Custom Front Wheels Up to 30”
    • Extended Saddlebags and Fenders
    • Chrome/Blacked out Bike
    • Grips
    • Foot Pegs
    • Floorboards
    • LED Lights - Turn Signal Brake Light Underbody


    Most Harley owners spend a lot of time in the saddle, and like every vehicle powered by an engine – the more miles you put on your bike, the more often it might need repairs. Whether it's a new drive windshield, belt, lights, tires, brakes, shocks or other repairs or replacements - our expert Harley-Davidson technicians have you covered. Our highly skilled team employs the most advanced technology and techniques to expertly diagnose all types of issues. We always provide you with a detailed, personal consultation regarding our findings, repair recommendations, and a cost estimate. As always, our main goal is to exceed your expectations and keep your ride operating at peak performance.

    Fat Head Cycles In Shop

    Fat Head Cycles will also remove the stress from the collision repair process by working with you on insurance claims and your Harley-Davidson extended warranty repair coverage. We always, keep communications with our customers and timely service priorities. We dedicate ourselves to getting your motorcycle back on the road in mint condition – as soon as possible!

    • Dealership-Level Computer Diagnostics
    • Collision Repairs
    • Parts Repairs and Replacements
    • Harley-Davidson Extended Warranty Repair Facility


    Routine maintenance helps keep your ride in top condition and specialized service is our goal at Fat Head Cycles. Whether you prefer to perform some maintenance work on your Harley at home of if you’re looking for the right shop to have some expert service work done, you can count on high-quality personalized service at Fat Head Cycles. Our experienced service technicians will work with you to develop a maintenance plan that fits your busy schedule whether you’re a recreational rider or live on your Harley. We’ll make sure your chain is properly lubed, your shaft drive is changed at the right time and your belt drive is checked and adjusted, if necessary.

    Because the potential for fuel-related problems is often overlooked, we’ll check the condition of your fuel filter to ensure it’s free of clogs, and schedule regularly recommended replacements.  We’ll also check your fuel line for cracks and weather-related damage and replace it if any irregularities are found.

    In addition to this full range of maintenance services, which also includes inspections and quick, efficient oil changes, battery diagnostics, and replacements and mounting and installing new tires, our technicians are qualified to make any type of custom adjustments to your motorcycle’s engine, handlebars, audio system or install specialized parts or accessories. We know that keeping your Harley properly serviced and maintained will keep it in great condition while preventing unpleasant surprises on the road.

    • Factory Recommended Service - all synthetic fluids
    • Tires
    • Brakes
    • ABS Brake Bleeding
    • Free Used Motorcycle Inspection to prepare you for state inspection
    • Batteries


    Keep your ride safe, warm and dry this winter.

    • $175 without in-and-out service
    • $265 with in-and-out service

    Includes 10% off parts and services while bike is in storage. All bikes will be stored in our secure facility, batteries will be monitored, fuel stabilizer added and bikes will be moved periodically so no flat spotting occurs on tires. 

    Fat Head Cycles


    Our customer service never stops – especially at the cash register. If you decide to purchase and install one of our performance upgrade and oil change kits or our audio system bundles and aren’t yet experienced at it, there’s no need to become frustrated or intimidated by the process. Take advantage of our installation videos hosted by our expert technicians. They’ll talk you through every step of the procedure! We’ll help you install an Arlen Ness Big Sucker™ air cleaner, a custom Dynamics LED headlight, an aftermarket head unit, a rake kit installation on a Harley and many more. and many more. You’re never on your own when you go with Fat Head Cycles!


    Our primary goal when providing our customers with our products or any of our in-shop services is to exceed all expectations. Our expert staff consistently goes beyond and above to make that happen. Our experienced Harley-Davidson technicians will be happy to personally consult with you before, during and after completing your custom project, repairs or maintenance job to ensure you’re completely satisfied with our work. Whether providing you with our various in-shop services or our large selection of Harley-Davidson parts, products, accessories and audio systems available in our online store, our dedication to offering superior customer service is unmatched. Period. We want your motorcycle to look as good, sound as powerful and run as smoothly as our own!  

    At Fat Head Cycles, we understand why you ride a Harley-Davidson. And that’s why our main goal is to make sure your ride is the best ride it can be. For more information about our services, products or upgrades, call us at 301.825.9007.

    Interested in repair, service, maintenance or custom work? Fill out a contact form below or give us a call in the shop, 301.825.9007, and we'll get you taken care of!

    Shipping Delays

    We are aware there are orders outstanding. Rest assured that your order has not been missed nor forgotten. A worldwide microchip shortage and other pandemic-related challenges have slowed the supply of products in many industries, including electronics. We're sorry for this problem and are working with our manufacturers to replenish stock and fill backorders. Our advisors and support reps have no extra info on when we expect this item.
    Our supply chains have been affected, distribution centers are backlogged and international shipping agencies have been severely affected by COVID19. Unfortunately, these things are completely out of our control. Once your order ships you will receive a SHIPPING CONFIRMATION email stating your order is on the way with TRACKING INFORMATION. If you have not received this email, your order is still in fulfillment que and is working its way up the list.
    Due to the fluid nature of the supply chain at this time, Fat Head Cycles CAN NOT provide ETAs on bundles that have yet to ship as many times we are simply waiting on one small part or another to complete the package. We here at Fat Head Cycles appreciate you as a customer and will always do the best we can to accommodate and fulfill your requests and your need for the best Harley Davidson audio and performance products in the industry.

    Thank you for your understanding.

    We appreciate you,

    The Fat Head Cycles Team