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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- Qty in Cart
- Quantity
- Price
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On Sale
BARNETT Derby Cover - Clear Black - M8 Softail 343-30-44018
BARNETT
MSRP: $246.48Now: $221.83Was: $246.48A quality derby cover does more than protect your primary cover—it's a window into your bike's mechanical heart and a cornerstone of your aesthetic. The Barnett Clear Black Derby Cover combines precision CNC-machined construction with a crystal-clear...11070731- SKU:
- 11070731
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
MSRP: $246.48Now: $221.83Was: $246.48 -
On Sale
BARNETT Derby Cover - Clear Chrome - M8 Softail 343-30-43018
BARNETT
MSRP: $302.10Now: $271.89Was: $302.10A quality derby cover does more than protect your primary—it's the first impression of your build. The Barnett clear chrome derby cover combines precision CNC-machined construction with a scratch-resistant polycarbonate window, letting you showcase your...11070732- SKU:
- 11070732
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
MSRP: $302.10Now: $271.89Was: $302.10 -
JOKER MACHINE Derby Cover - 5 Hole - Finned - Black - M8 Softail 06-965-1
JOKER MACHINE
$168.95A quality derby cover protects your primary cover while eliminating visual clutter with a minimalist aesthetic. Joker Machine's finned design delivers classic racing style without sacrificing functionality or adding unnecessary weight. This...11070735- SKU:
- 11070735
- Availability:
- Ships Same Business Day
- Weight:
- 1.09 LBS
$168.95 -
JOKER MACHINE Derby Cover - 5 Hole - Finned - Black/Silver - M8 Softail 06-965-2
JOKER MACHINE
$153.95If you're running an M8 Softail, a quality derby cover does more than protect your primary—it sets the visual tone for your entire build. The JOKER MACHINE finned derby cover delivers that stripped-down, race-inspired aesthetic while maintaining the...11070736- SKU:
- 11070736
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
$153.95 -
JOKER MACHINE Derby Cover - 5 Hole - Finned - Chrome - M8 Softail 06-965-3
JOKER MACHINE
$184.95A quality derby cover protects your primary case while delivering the stripped-down aesthetic that defines modern custom Harley styling. Joker Machine's finned design cuts weight without sacrificing durability, and the direct-fit design means you're...11070737- SKU:
- 11070737
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
$184.95 -
JOKER MACHINE Derby Cover - 5 Hole - Smooth - Black - M8 Softail 06-966-1
JOKER MACHINE
$153.95A quality derby cover protects your primary case while defining your bike's aesthetic—and this Joker Machine piece delivers both without the bulk. The smooth, minimalist design strips away unnecessary material for a genuine lightweight upgrade, while the...11070738- SKU:
- 11070738
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
$153.95 -
JOKER MACHINE Derby Cover - 5 Hole - Smooth - Chrome - M8 Softail 06-966-3
JOKER MACHINE
$184.95A clean, minimalist derby cover transforms your M8 Softail's top end into a refined focal point while reducing unnecessary weight. The Joker Machine design strips away excess material for that purposeful, race-inspired aesthetic without compromising...11070739- SKU:
- 11070739
- Availability:
- Ships Same Business Day
- Weight:
- 1.22 LBS
$184.95Qty in Cart: 0Quantity:Price:$184.95Subtotal: -
KODLIN USA NXL Derby Cover - Black - M8 Touring K25409
KODLIN USA
$169.99A derby cover isn't just cosmetic—it protects your primary drivetrain from debris, moisture, and contamination while completing a refined aesthetic on your M8 Touring. The KODLIN USA NXL combines precision engineering with understated elegance, using...11070740- SKU:
- 11070740
- Availability:
- Ships Same Business Day
- Weight:
- 1.28 LBS
$169.99 -
KODLIN USA NXL Derby Cover - Black - M8 Softail K25410
KODLIN USA
$169.99A derby cover isn't just cosmetic—it protects your primary drivetrain from dirt, debris, and moisture while maintaining a clean, finished appearance on your M8 Softail. The KODLIN USA NXL derby cover combines precision engineering with durability,...11070741- SKU:
- 11070741
- Availability:
- Ships Same Business Day
- Weight:
- 0.76 LBS
$169.99 -
KODLIN USA NXL Point Cover - Black - M8 K25411
KODLIN USA
$69.99A quality point cover protects your engine's internal ignition components while contributing to the overall aesthetic of your build. The KODLIN USA NXL combines precision engineering with purposeful design, eliminating cheap-looking plastic covers in...11070742- SKU:
- 11070742
- Availability:
- Ships Same Business Day
- Weight:
- 0.23 LBS
$69.99 -
TRASK Assault Derby Cover - Matte Black - Big Twin TM-0040MBK
TRASK
$279.95A quality derby cover protects your primary case from debris and road damage while serving as a visual anchor for your bike's aesthetic. The TRASK Assault Derby Cover delivers precision-machined construction that complements high-performance air intake...11070749- SKU:
- 11070749
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
$279.95 -
TRASK Assault Derby Cover - Reverse Cut - Big Twin TM-0040RC
TRASK
$279.95A quality derby cover protects your top-end components while maintaining clean aesthetics under the hood. The TRASK Assault Derby Cover delivers precision-machined durability with the added benefit of a transparent acrylic window—so you can monitor your...11070750- SKU:
- 11070750
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
$279.95 -
TRASK Assault Derby Cover - Matte Black - Touring/Trike TM-0041MBK
TRASK
$279.95A quality derby cover does more than protect your primary cover from road debris and weather—it's a statement of craftsmanship that complements a premium air cleaner setup. The TRASK Assault Derby Cover combines precision CNC-machined billet aluminum...11070751- SKU:
- 11070751
- Availability:
- Ships Same Business Day
- Weight:
- 2.20 LBS
$279.95 -
TRASK Assault Derby Cover - Reverse Cut - Touring/Trike TM-0041RC
TRASK
$279.95A quality derby cover protects your engine's internal components from debris and moisture while completing a cohesive, custom aesthetic. The TRASK Assault Derby Cover combines precision engineering with functional design—the reverse-cut billet...11070752- SKU:
- 11070752
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
$279.95 -
BAKER DRIVETRAIN Transmission Side Cover - Hydraulic - M8 - Polish M8-10602-A
BAKER DRIVETRAIN
$524.95A hydraulic transmission side cover is critical for smooth, reliable clutch actuation in high-performance racing applications. The Baker Drivetrain M8-10602-A delivers precise engagement through a purpose-built hydraulic system, eliminating mechanical...11070727- SKU:
- 11070727
- Availability:
- Ships Same Business Day
- Weight:
- 3.80 LBS
- COLOR/FINISH:
- POLISHED
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- PRODUCT NAME:
- SIDE COVER
- TRANSMISSION TYPE:
- HYDRAULIC
- TYPE:
- TRANSMISSION
$524.95 -
BAKER DRIVETRAIN Transmission Side Cover - Hydraulic - M8 - Black M8-10603-A
BAKER DRIVETRAIN
$524.95If you're running a manual transmission with hydraulic actuation, your side cover needs to handle real-world pressure without compromise. The BAKER DRIVETRAIN M8-10603-A delivers a purpose-built solution that clears modern exhaust systems while providing...11070728- SKU:
- 11070728
- Availability:
- Ships Same Business Day
- Weight:
- 3.71 LBS
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SIDE COVER
- TRANSMISSION TYPE:
- HYDRAULIC
- UNITS:
- KIT
- TYPE:
- TRANSMISSION
$524.95 -
BAKER DRIVETRAIN Transmission Side Cover - Mechanical - Big Twin - Wrinkle Black BD-10603-A
BAKER DRIVETRAIN
$298.95A clean, functional transmission cover that doesn't compromise clearance or aesthetics. The Baker Drivetrain side cover delivers minimalist design without sacrificing the practical features you need—like straightforward side filling and full exhaust pipe...11070729- SKU:
- 11070729
- Availability:
- Ships Same Business Day
- Weight:
- 2.05 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SIDE COVER
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- TRANSMISSION TYPE:
- MECHANICAL
- TYPE:
- TRANSMISSION
- COLOR/FINISH:
- WRINKLE BLACK
- UNITS:
- KIT
$298.95Qty in Cart: 0Quantity:Price:$298.95Subtotal: -
BAKER DRIVETRAIN Transmission Side Cover - Mechanical - Big Twin - Gloss Black BD-10605-A
BAKER DRIVETRAIN
$298.95A clean, functional transmission cover that doesn't compromise clearance or compatibility is essential for any Big Twin build. The BAKER DRIVETRAIN Transmission Side Cover delivers a minimalist aesthetic while maintaining full access to the transmission...11070730- SKU:
- 11070730
- Availability:
- Ships Same Business Day
- Weight:
- 2.15 LBS
- TRANSMISSION TYPE:
- MECHANICAL
- COLOR/FINISH:
- GLOSS BLACK
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- TYPE:
- TRANSMISSION
- UNITS:
- KIT
- PRODUCT NAME:
- SIDE COVER
- RIDING STYLE:
- STREET
$298.95 -
PAUGHCO Inner Primary Cover - Chrome 752
PAUGHCO
$239.95The PAUGHCO Inner Primary Cover keeps your primary drivetrain protected from debris and contamination while maintaining a polished, factory-correct appearance. Whether you're running a stock setup or a high-performance build, this chrome cover shields...11070187- SKU:
- 11070187
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- INNER PRIMARY
$239.95Qty in Cart: 0Quantity:Price:$239.95Subtotal: -
PAUGHCO Outer Primary Cover 751
PAUGHCO
$314.95The PAUGHCO Outer Primary Cover 751 protects your primary drive system from debris, moisture, and contamination while maintaining a clean, factory-finished appearance. This cover is engineered to preserve primary component longevity and reduce...11070190- SKU:
- 11070190
- Availability:
- Ships Same Business Day
- Weight:
- 3.05 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- FEATURES:
- FOR USE WITH COMPENSATING SPROCKET
- RIDING STYLE:
- STREET
- TYPE:
- OUTER PRIMARY
- UNITS:
- EACH
$314.95
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.
