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!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
On Sale
ARLEN NESS Derby Cover 700-022
ARLEN NESS
MSRP: $169.95Now: $154.65Was: $169.95A quality derby cover protects your primary case from moisture, debris, and road contaminants while maintaining clean aesthetics on your machine. The ARLEN NESS 700-022 delivers precision-machined construction with a finished appearance that complements...11070657- SKU:
- 11070657
- Availability:
- Ships Same Business Day
- Weight:
- 1.95 LBS
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- COLOR/FINISH:
- RED ANODIZED
- RIDING STYLE:
- STREET
- STYLE:
- 10 GAUGE
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
MSRP: $169.95Now: $154.65Was: $169.95 -
On Sale
ARLEN NESS Derby Cover 700-017
ARLEN NESS
MSRP: $159.95Now: $145.55Was: $159.95A quality derby cover protects your engine's internal components from dirt, debris, and moisture while maintaining a clean aesthetic that complements your bike's finish. The ARLEN NESS Derby Cover 700-017 delivers precision engineering with CNC-machined...11070666- SKU:
- 11070666
- Availability:
- Ships Same Business Day
- Weight:
- 1.16 LBS
- PRODUCT NAME:
- DERBY COVER
- STYLE:
- 10 GAUGE
- UNITS:
- EACH
- COLOR/FINISH:
- CHROME
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
- RIDING STYLE:
- STREET
MSRP: $159.95Now: $145.55Was: $159.95 -
On Sale
ARLEN NESS Derby Cover 700-016
ARLEN NESS
MSRP: $159.95Now: $145.55Was: $159.95Machined from 6061-T6 billet aluminum, Chrome hardware and gasket included, Matching point and inspection covers available separately, Sold each11070653- SKU:
- 11070653
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- PRODUCT NAME:
- DERBY COVER
- COLOR/FINISH:
- BLACK ANODIZED
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
- STYLE:
- 10 GAUGE
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $159.95Now: $145.55Was: $159.95Qty in Cart: 0Quantity:Price:MSRP: $159.95Now: $145.55Was: $159.95Subtotal: -
On Sale
ARLEN NESS Derby Cover 700-020
ARLEN NESS
MSRP: $169.95Now: $154.65Was: $169.95A derby cover serves as both a functional and aesthetic component, protecting your primary drive system while presenting a finished appearance on your engine. The ARLEN NESS Derby Cover 700-020 combines precision CNC machining with durable billet...11070655- SKU:
- 11070655
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- PRODUCT NAME:
- DERBY COVER
- STYLE:
- 10 GAUGE
- UNITS:
- EACH
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- GOLD ANODIZED
MSRP: $169.95Now: $154.65Was: $169.95 -
On Sale
ARLEN NESS Derby Cover 700-023
ARLEN NESS
MSRP: $169.95Now: $154.65Was: $169.95A quality derby cover protects your primary cover from road debris and weather while maintaining a clean, finished look on your engine case. The ARLEN NESS Derby Cover 700-023 is precision-machined from 6061-T6 billet aluminum, offering durability...11070658- SKU:
- 11070658
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- COLOR/FINISH:
- TITANIUM ANODIZED
- RIDING STYLE:
- STREET
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
- STYLE:
- 10 GAUGE
MSRP: $169.95Now: $154.65Was: $169.95 -
On Sale
ARLEN NESS Derby Cover - Black 700-002
ARLEN NESS
MSRP: $159.95Now: $145.55Was: $159.95A quality derby cover protects your engine's internal components from contamination while establishing a clean, finished look for your motorcycle's top end. The Arlen Ness Derby Cover combines precision machining with durable materials to deliver...11070663- SKU:
- 11070663
- Availability:
- Ships Same Business Day
- Weight:
- 1.65 LBS
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- MODEL:
- 10 GAUGE
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- SILVER
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
- COLOR/FINISH:
- BLACK ANODIZED
MSRP: $159.95Now: $145.55Was: $159.95 -
On Sale
ARLEN NESS Derby Cover - Chrome 700-001
ARLEN NESS
MSRP: $159.95Now: $145.55Was: $159.95The ARLEN NESS Derby Cover delivers the refined aesthetic and durability that separates a well-maintained engine from a neglected one. Machined from aerospace-grade 6061-T6 billet aluminum, this cover resists corrosion while maintaining the precision fit...11070664- SKU:
- 11070664
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- MODEL:
- 10 GAUGE
- RIDING STYLE:
- STREET
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
MSRP: $159.95Now: $145.55Was: $159.95 -
On Sale
ARLEN NESS Derby Cover 700-018
ARLEN NESS
MSRP: $169.95Now: $154.65Was: $169.95A quality derby cover protects your engine's internal components from dirt, debris, and moisture while maintaining a clean, finished appearance on your motorcycle. The Arlen Ness 700-018 delivers both durability and style with precision machining and...11070665- SKU:
- 11070665
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- COLOR/FINISH:
- SILVER
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
- COLOR/FINISH:
- BLACK ANODIZED
- STYLE:
- 10 GAUGE
MSRP: $169.95Now: $154.65Was: $169.95 -
JOKER MACHINE Inspection Cover - Black - Finned 06-95-1
JOKER MACHINE
$98.95Engine bay aesthetics matter when you're serious about your build. The JOKER MACHINE Inspection Cover combines functional design with the finned details that separate a thoughtfully assembled machine from an amateur effort. Whether you're running a show...11070566- SKU:
- 11070566
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- COLOR/FINISH:
- ANODIZED
- PRODUCT NAME:
- INSPECTION COVER
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
- MATERIAL:
- ALUMINUM
- STYLE:
- FINNED
$98.95 -
JOKER MACHINE Inspection Cover 10-664-1
JOKER MACHINE
$47.95A clean, professional engine bay starts with quality details—and this inspection cover delivers both aesthetics and durability. CNC-milled from 6061-T6 billet aluminum, it resists corrosion and maintains a finished look that reflects your commitment to...11070573- SKU:
- 11070573
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- 6061 T-6 ALUMINUM
- MOUNTING STYLE:
- 2 HOLE
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- STYLE:
- FINNED
- UNITS:
- EACH
- TYPE:
- INSPECTION
- COLOR/FINISH:
- ANODIZED
$47.95Qty in Cart: 0Quantity:Price:$47.95Subtotal: -
JOKER MACHINE Derby Cover - Black - Finned 10-690-1
JOKER MACHINE
$144.95A quality derby cover protects your engine's internal components from dirt, moisture, and debris while delivering a clean, finished look to your motorcycle's aesthetic. The JOKER MACHINE finned design combines functional ventilation with classic styling,...11070574- SKU:
- 11070574
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- COLOR/FINISH:
- BLACK ANODIZED
- TYPE:
- DERBY
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- STYLE:
- FINNED
- UNITS:
- EACH
$144.95 -
JOKER MACHINE Derby Cover - Black/Silver - Finned 10-690B
JOKER MACHINE
$144.95A quality derby cover protects your primary cover from road debris, weather, and oxidation while adding purposeful visual detail to your engine. The JOKER MACHINE finned design combines functional cooling benefits with clean aesthetics, giving your bike...11070167- SKU:
- 11070167
- Availability:
- Ships Same Business Day
- Weight:
- 1.31 LBS
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- STYLE:
- FINNED
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK ANODIZED
- COLOR/FINISH:
- SILVER
- TYPE:
- DERBY
$144.95 -
JOKER MACHINE Inspection Cover - Chrome - Finned 06-95FN
JOKER MACHINE
$109.95A quality inspection cover does more than protect your engine—it completes the visual integrity of your build while providing functional access to critical components. The JOKER MACHINE Finned Inspection Cover combines polished chrome aesthetics with...11070108- SKU:
- 11070108
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- PRODUCT NAME:
- INSPECTION COVER
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- STYLE:
- FINNED
- UNITS:
- EACH
$109.95 -
JOKER MACHINE Derby Cover 06-98FN
JOKER MACHINE
$138.95A quality derby cover protects your engine's internal components from debris, moisture, and contamination while maintaining a finished appearance on your primary cover. The JOKER MACHINE Derby Cover 06-98FN is precision-engineered to fit Harley-Davidson...11070110- SKU:
- 11070110
- Availability:
- Ships Same Business Day
- Weight:
- 0.89 LBS
- TYPE:
- DERBY
- MOUNTING STYLE:
- 5 HOLE
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- STYLE:
- FINNED
- UNITS:
- EACH
$138.95 -
JOKER MACHINE Derby Cover 06-99FN
JOKER MACHINE
$191.95A derby cover protects your primary engine case from road debris, moisture, and premature wear while maintaining a clean, finished appearance on your motorcycle's left side. Whether you're running a stock engine or a custom build, the JOKER MACHINE Derby...11070113- SKU:
- 11070113
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- UNITS:
- EACH
- TYPE:
- DERBY
- MATERIAL:
- ALUMINUM
- STYLE:
- FINNED
- COLOR/FINISH:
- CHROME
- MOUNTING STYLE:
- 5 HOLE
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
$191.95Qty in Cart: 0Quantity:Price:$191.95Subtotal: -
JOKER MACHINE Derby Cover 06-99TC
JOKER MACHINE
$180.95A quality derby cover protects your primary case from road debris, moisture, and UV damage while maintaining a clean, finished appearance on your engine. The JOKER MACHINE Derby Cover 06-99TC combines robust construction with a sleek design that...11070208- SKU:
- 11070208
- Availability:
- Ships Same Business Day
- Weight:
- 1.16 LBS
- PRODUCT NAME:
- COVER
- TYPE:
- DERBY
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- STYLE:
- FINNED
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- MOUNTING STYLE:
- 5 HOLE
$180.95 -
JOKER MACHINE Inspection Cover - Black/Silver - Finned 06-95TC
JOKER MACHINE
$98.95A quality inspection cover isn't just about aesthetics—it protects your engine's internals from debris and contamination while providing access for routine maintenance. The JOKER MACHINE Inspection Cover combines precision engineering with a distinctive...11070210- SKU:
- 11070210
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- INSPECTION COVER
- COLOR/FINISH:
- BLACK
- MATERIAL:
- ALUMINUM
- STYLE:
- FINNED
- UNITS:
- EACH
$98.95 -
JOKER MACHINE Inspection Cover 10-667B
JOKER MACHINE
$43.95An engine inspection cover serves as both a protective barrier and a visual statement on your build. The JOKER MACHINE 10-667B replaces stock covers with precision-machined billet aluminum that withstands high heat, vibration, and repeated engine bay...11070293- SKU:
- 11070293
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- COLOR/FINISH:
- BLACK
- MATERIAL:
- 6061 T-6 ALUMINUM
- STYLE:
- JOKER™
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MOUNTING STYLE:
- 2 HOLE
- TYPE:
- INSPECTION
$43.95 -
JOKER MACHINE Derby Cover - Flame 06-99F
JOKER MACHINE
$191.95Your engine's primary visual statement deserves the same attention to detail as your performance upgrades. The JOKER MACHINE Derby Cover in Flame styling delivers authentic custom aesthetics while protecting your clutch components from dust, debris, and...DS375057- SKU:
- DS375057
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TYPE:
- DERBY
- STYLE:
- FLAME
$191.95 -
JOKER MACHINE Derby Cover - Smooth 06-99S
JOKER MACHINE
$191.95The JOKER MACHINE Derby Cover – Smooth 06-99S delivers a clean, factory-finished look while protecting your primary cover from road debris and wear. This billet aluminum piece combines aesthetic refinement with functional durability, making it an...DS375060- SKU:
- DS375060
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- STYLE:
- SMOOTH
- RIDING STYLE:
- STREET
- TYPE:
- DERBY
- UNITS:
- EACH
$191.95
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.
