Harley Transmission Covers
Harley-Davidson Transmission Covers at JJ Motorsports
Shield your Harley's primary and transmission with premium covers from JJ Motorsports, featuring chrome and black finishes for classic style and durability on Big Twin, Evo, and Twin Cam models. These billet and cast covers protect internals while adding custom flair.
Shop Paughco, Thrashin Supply Co, and Drag Specialties transmission covers for proven quality. Explore related categories such as Harley drivetrain for clutch and chains, or Harley for exhaust and seats to complete your build.
Top Harley-Davidson Transmission Covers
- Paughco Outer Primary Cover B750 – Cast aluminum outer primary cover; vintage-style for Big Twin models with clean fit.
- Thrashin Supply Co Derby Cover Black Classic TSC-3000-4 – Black classic derby cover; CNC-machined for Evo and Twin Cam with hidden fasteners.
- Drag Specialties Outer Primary Cover Chrome Narrow Profile 77957 – Chrome narrow primary cover; low-profile for custom Softail and Dyna builds.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
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- Price
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JOKER MACHINE Inspection Cover - Smooth 921016C
JOKER MACHINE
$109.95A quality inspection cover does more than protect your engine bay—it's the first visual indicator of a well-maintained, precision-built machine. The JOKER MACHINE Inspection Cover elevates your motorcycle's aesthetics while delivering the durability and...DS375068- SKU:
- DS375068
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
$109.95Qty in Cart: 0Quantity:Price:$109.95Subtotal: -
TRASK Assault Derby Cover - Matte Black - Softail TM-0042MBK
TRASK
$279.95A quality derby cover protects your primary cover from dirt, debris, and weather while completing your bike's visual package. The TRASK Assault Derby Cover delivers both function and form with precision-machined construction that matches TRASK's complete...11070754- SKU:
- 11070754
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
$279.95 -
TRASK Assault Derby Cover - Reverse Cut - Softail TM-0042RC
TRASK
$279.95A clean, custom look starts with quality details, and the TRASK Assault Derby Cover delivers both style and function. The reverse-cut design pairs seamlessly with TRASK's Assault air cleaner and cam cover lineup, giving your Softail a cohesive,...11070755- SKU:
- 11070755
- Availability:
- Ships Same Business Day
- Weight:
- 1.31 LBS
$279.95 -
COVINGTONS Derby Cover - Dimpled - 5-Hole - Black - Softail C1973-B
COVINGTONS
$191.95A quality derby cover protects your primary cover from road debris and moisture while maintaining a clean, finished appearance on your Softail. The Covington's dimpled design adds visual interest without sacrificing durability, and the CNC-machined...11070697- SKU:
- 11070697
- Availability:
- Ships Same Business Day
- Weight:
- 0.94 LBS
$191.95 -
COVINGTONS Derby Cover - Dimpled - 5-Hole - Chrome - Softail C1973-C
COVINGTONS
$191.95A quality derby cover protects your primary cover from road debris and weather while adding a refined aesthetic to your Softail's engine bay. The dimpled design reduces light reflection for a sophisticated look that complements modern and classic builds...11070698- SKU:
- 11070698
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
$191.95 -
COVINGTONS Derby Cover - Diamondback - 5-Hole - Black - Twin Cam C3074-B
COVINGTONS
$216.95A derby cover protects your primary cover from road debris, moisture, and UV damage while maintaining a finished appearance on your engine. The Covington's Diamondback delivers precision CNC machining and a distinctive aesthetic that sets your Twin Cam...11070701- SKU:
- 11070701
- Availability:
- Ships Same Business Day
- Weight:
- 2.02 LBS
$216.95 -
LA CHOPPERS County Line Derby Cover Derby Cover - Twin Cam - Raw LA-P106-00
LA CHOPPERS
$124.99Your Twin Cam engine deserves a derby cover that matches your bike's aesthetic while delivering clean, precision engineering. The LA CHOPPERS County Line Derby Cover replaces a stock component with a purposeful billet alternative that integrates...11070710- SKU:
- 11070710
- Availability:
- Ships Same Business Day
- Weight:
- 1.17 LBS
$124.99 -
LA CHOPPERS County Line Derby Cover Derby Cover - Twin Cam - Black LA-P106-00B
LA CHOPPERS
$162.99A worn or stock derby cover compromises your Twin Cam's visual impact and leaves performance details hidden. The LA CHOPPERS County Line Derby Cover delivers the precision fit and refined aesthetics your engine deserves, with billet construction that...11070711- SKU:
- 11070711
- Availability:
- Ships Same Business Day
- Weight:
- 1.17 LBS
$162.99 -
LA CHOPPERS County Line Derby Cover Derby Cover - M8 FL - Raw LA-P106-01
LA CHOPPERS
$124.99The stock derby cover doesn't have to limit your aesthetic. This LA CHOPPERS County Line cover replaces the factory unit with precision-machined billet aluminum that coordinates seamlessly with the rest of the County Line lineup while delivering a...11070713- SKU:
- 11070713
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
$124.99 -
LA CHOPPERS County Line Derby Cover Derby Cover - M8 FL - Black LA-P106-01B
LA CHOPPERS
$162.99The stock derby cover on your M8 FL is functional, but it lacks the refined aesthetics and precision engineering your bike deserves. LA CHOPPERS' County Line Derby Cover replaces it with a billet aluminum alternative that delivers a clean, modern look...11070714- SKU:
- 11070714
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
$162.99 -
LA CHOPPERS County Line Derby Cover Derby Cover - M8 FL - Chrome LA-P106-01C
LA CHOPPERS
$194.99A stock derby cover draws attention for all the wrong reasons. This LA Choppers County Line Derby Cover replaces that plastic piece with precision-machined billet aluminum that delivers a refined, low-profile aesthetic while maintaining the durability...11070715- SKU:
- 11070715
- Availability:
- Ships Same Business Day
- Weight:
- 1.42 LBS
$194.99 -
LA CHOPPERS County Line Derby Cover Derby Cover - M8 Softail - Raw LA-P106-02
LA CHOPPERS
$124.99The stock derby cover on your M8 Softail is functional, but it's also generic. The LA CHOPPERS County Line Derby Cover replaces it with a precision-machined billet aluminum alternative that elevates your engine's visual presence while maintaining the...11070716- SKU:
- 11070716
- Availability:
- Ships Same Business Day
- Weight:
- 1.08 LBS
$124.99 -
LA CHOPPERS County Line Derby Cover Derby Cover - M8 - Softail - Chrome LA-P106-02C
LA CHOPPERS
$164.99A quality derby cover protects your M8 Softail's primary cover from road debris and moisture while giving your bike a finished, premium appearance. The LA CHOPPERS County Line Derby Cover upgrades your engine's visual impact with precision-machined...11070718- SKU:
- 11070718
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
$164.99 -
BAKER DRIVETRAIN Transmission Door Assembly - Polished 48902-6
BAKER DRIVETRAIN
$395.00Stock transmission doors become a bottleneck when you're pushing serious power through your drivetrain. The BAKER DRIVETRAIN Transmission Door Assembly upgrades your bearings with 28% wider geometry and eliminates phantom clutch lever movement, giving...11070719- SKU:
- 11070719
- Availability:
- Ships Same Business Day
- Weight:
- 5.06 LBS
$395.00 -
BAKER DRIVETRAIN Transmission Door Assembly - Wrinkle Black 48403-6
BAKER DRIVETRAIN
$395.00Stock transmission doors are a common weak point in high-output engine builds, introducing unnecessary parasitic losses and inconsistent clutch feel. The BAKER DRIVETRAIN Transmission Door Assembly eliminates these issues with precision-engineered...11070720- SKU:
- 11070720
- Availability:
- Ships Same Business Day
- Weight:
- 5.00 LBS
$395.00 -
BAKER DRIVETRAIN Transmission Cover - Black DD7-10603-A
BAKER DRIVETRAIN
$479.00A quality transmission cover protects your drivetrain from contamination and heat while maintaining clean lines under the car. This BAKER DRIVETRAIN unit delivers that protection without sacrificing exhaust clearance—critical when running tight headers...11070721- SKU:
- 11070721
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
$479.00 -
LA CHOPPERS County Line Derby Cover Derby Cover - Twin Cam - Bronze LA-P106-00Z
LA CHOPPERS
$162.99The stock derby cover is one of the first visual upgrades that sets the tone for your Twin Cam's appearance—why settle for plain when a precision-machined billet cover elevates both form and function? LA CHOPPERS' County Line Derby Cover delivers a...11070722- SKU:
- 11070722
- Availability:
- Ships Same Business Day
- Weight:
- 1.16 LBS
$162.99 -
LA CHOPPERS County Line Derby Cover Derby Cover - M8 FL - Bronze LA-P106-01Z
LA CHOPPERS
$162.99The stock derby cover on your M8 FL is functional, but it lacks the visual impact and refined engineering that separates a built machine from an assembly-line bike. LA Choppers' billet County Line Derby Cover replaces that generic cover with a...11070723- SKU:
- 11070723
- Availability:
- Ships Same Business Day
- Weight:
- 1.38 LBS
$162.99 -
PERFORMANCE MACHINE (PM) Race Series Derby Cover - Black Ops 0177-2085-SMB
PERFORMANCE MACHINE (PM)
$164.95If you're running a stock derby cover, you're leaving performance on the table—and aesthetics too. The PM Race Series Derby Cover upgrades both your primary cooling efficiency and your engine's visual presence with a purposeful, race-inspired design...09402137- SKU:
- 09402137
- Availability:
- Ships Same Business Day
- Weight:
- 1.08 LBS
$164.95 -
PERFORMANCE MACHINE (PM) Race Series Derby Cover - Black Ops 0177-2086-SMB
PERFORMANCE MACHINE (PM)
$164.95Your stock derby cover is holding back both your bike's appearance and cooling efficiency. The PM Race Series Derby Cover delivers the thermal performance of a race-proven design while establishing the aggressive aesthetic your machine deserves. With a...09402138- SKU:
- 09402138
- Availability:
- Ships Same Business Day
- Weight:
- 1.93 LBS
$164.95
Buying Guide and FAQs
Buying Guide: Factors to Consider When Choosing Harley Bike Transmission Covers
- Compatibility: Ensure covers fit your Harley's model (e.g., Big Twin, Evo, Twin Cam, custom Softail/Dyna) and specifics like mounting holes (e.g., 8-hole for derby, 2-hole for inspection). Use the vehicle selector for year-specific matches to avoid fit issues.
- Type of Use: For aesthetic upgrades or custom looks, opt for derby/inspection covers; primary covers (inner/outer) suit protection and style in street riding; clutch actuators ideal for hydraulic systems in touring conditions.
- Components and Upgrades: Select derby covers with see-through windows or hidden fasteners, primary covers for narrow profiles, or actuators with banjo bolts. Focus on included hardware (e.g., bleeder screws) for complete installation.
- Brand and Quality: Choose PAUGHCO for chrome/black primary covers, Thrashin Supply Co for CNC-machined derby covers, Drag Specialties for narrow profile primaries, PRO-ONE PERF.MFG. for ball-milled/millennium derby covers, or TRASK for see-through assault covers. Prioritize cast/billet aluminum for durability and corrosion resistance.
- Installation and Cost: Most are bolt-on using OEM bolts; prices range from $28.95 for inspection covers to $317.95 for outer primaries—factor in finishes (chrome, black, gloss) and free shipping over $99 for value.
Frequently Asked Questions (FAQs)
- What Harley models do these transmission covers support? Covers support Big Twin, Evo, Twin Cam, and custom Softail/Dyna models—use the year/make/model filter for exact compatibility with stock H-D or aftermarket primaries.
- How do derby covers improve style? Designs like ball-milled, smooth, or see-through windows (e.g., TRASK with acrylic) add custom aesthetics with 8-hole mounting for easy swaps.
- What is typically included with clutch actuators? Actuators like PRO-ONE include 10mm banjo bolt, washers, bleeder screw—require separate 11/16" bore master cylinder and hydraulic line.
- What materials are used in covers? Primarily cast aluminum or billet aluminum with chrome, black (gloss/anodized), or raw finishes for style and durability.
- What if a cover doesn't fit my Harley? Verify mounting style (e.g., 8-hole derby, 2-hole inspection) and model before buying. Our returns policy allows exchanges or refunds if it doesn't match.
- Can I find related drivetrain parts? Yes—explore clutches, belts, sprockets, or full kits in the Harley drivetrain category to complement your transmission cover upgrade.
