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
-
DRAG SPECIALTIES Split Skull Derby Cover - Chrome 78046
DRAG SPECIALTIES
$77.20A quality derby cover protects your engine's internal components from moisture, debris, and contaminants while maintaining a clean, finished appearance. The DRAG Specialties Split Skull Derby Cover delivers both functional protection and distinctive...11070552- SKU:
- 11070552
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- DERBY COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MOUNTING STYLE:
- 5 HOLE
- MODEL:
- SPLIT SKULL
- TYPE:
- DERBY
$77.20 -
DRAG SPECIALTIES Split Skull Derby Cover - Black 78046B
DRAG SPECIALTIES
$77.20A quality derby cover protects your engine's primary cover from the elements while maintaining a cohesive aesthetic with the rest of your bike's styling. The Drag Specialties Split Skull design delivers unmistakable visual impact without compromising...11070553- SKU:
- 11070553
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- COLOR/FINISH:
- CHROME
- TYPE:
- DERBY
- MODEL:
- SPLIT SKULL
- COLOR/FINISH:
- BLACK
- MOUNTING STYLE:
- 5 HOLE
- RIDING STYLE:
- STREET
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
$77.20 -
BARNETT '15-'20 FL Chrome/Clear Derby Cover - For Narrow Primary 343-30-43015
BARNETT
$302.10Designed to fit OEM primary covers on select Harley Davidson Big Twins, Features a clear 0.25" thick polycarbonate window to your clutch, Window is scratch and discoloration resistant and is sealed with an o-ring gasket, Derby cover gasket also included11070540- SKU:
- 11070540
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
- MODEL:
- SCORPION SERIES
- PRODUCT NAME:
- DERBY COVER
$302.10 -
BARNETT '15-'20 FL Black/Clear Derby Cover - For Narrow Primary 343-30-44015
BARNETT
$246.48Designed to fit OEM primary covers on select Harley Davidson Big Twins, Features a clear 0.25" thick polycarbonate window to your clutch, Window is scratch and discoloration resistant and is sealed with an o-ring gasket, Derby cover gasket also included11070541- SKU:
- 11070541
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- POWDER-COATED
- MODEL:
- SCORPION SERIES
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
$246.48 -
BARNETT '07-'18 Big Twin Chrome/Clear Derby Cover 343-30-43013
BARNETT
$302.10Designed to fit OEM primary covers on select Harley Davidson Big Twins, Features a clear 0.25" thick polycarbonate window to your clutch, Window is scratch and discoloration resistant and is sealed with an o-ring gasket, Derby cover gasket also included11070436- SKU:
- 11070436
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- CHROME
- MODEL:
- SCORPION SERIES
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
$302.10 -
ALLOY ART Inner Primary Plug - FXD/FXR MPP-1
ALLOY ART
$35.95Used when adding forward controls to FXD(92-05) & FXR(82-00) models and eliminating the mid shifter shaft, Plugs holes in inner primary cover for a finished look, Anodized billet aluminum, complete with O-rings, bolt and locking tab, Made in the U.S.A.11070073- SKU:
- 11070073
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- BILLET ALUMINUM
- RIDING STYLE:
- STREET
- TYPE:
- INNER PRIMARY
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- PLUG
- UNITS:
- EACH
- COLOR/FINISH:
- ANODIZED
$35.95 -
COVINGTONS Derby Cover - Black - 5 Hole C1875-B
COVINGTONS
$241.95A derby cover does more than protect your primary drive—it's a visible statement of craftsmanship and attention to detail. This Covington piece combines genuine functionality with the aggressive aesthetic of a ripper-style design, giving your bike's...11070683- SKU:
- 11070683
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
- COLOR/FINISH:
- BLACK
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
- STYLE:
- RIPPER
- PRODUCT NAME:
- DERBY COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$241.95 -
COVINGTONS Derby Cover - Black - Dimpled C1075-B
COVINGTONS
$241.95CNC-machined from billet aluminum, Includes mounting hardware, Made in the U.S.A.11070490- SKU:
- 11070490
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- POWDER-COATED
- PRODUCT NAME:
- COVER
- TYPE:
- DERBY
- UNITS:
- EACH
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
- COLOR/FINISH:
- GLOSS
- STYLE:
- DIMPLED
$241.95 -
COVINGTONS Derby Cover - Black - Machine Head C1074-B
COVINGTONS
$216.95CNC-machined from billet aluminum, Includes mounting hardware, Made in the U.S.A.11070243- SKU:
- 11070243
- Availability:
- Ships Same Business Day
- Weight:
- 2.40 LBS
- COLOR/FINISH:
- BLACK
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
- COLOR/FINISH:
- POWDER-COATED
- PRODUCT NAME:
- COVER
- TYPE:
- DERBY
- UNITS:
- EACH
- STYLE:
- MACHINE HEAD
- COLOR/FINISH:
- GLOSS
- RIDING STYLE:
- STREET
$216.95Qty in Cart: 0Quantity:Price:$216.95Subtotal: -
COVINGTONS Derby Cover - Chrome - Machine Head C1074-C
COVINGTONS
$216.95A quality derby cover protects your engine's internal components from debris and moisture while maintaining a finished appearance on your machine. The Covingtons Machine Head derby cover combines precision machining with durable materials to deliver both...11070244- SKU:
- 11070244
- Availability:
- Ships Same Business Day
- Weight:
- 2.55 LBS
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- TYPE:
- DERBY
- UNITS:
- EACH
- STYLE:
- MACHINE HEAD
$216.95Qty in Cart: 0Quantity:Price:$216.95Subtotal: -
COVINGTONS Derby Cover - Diamond Edge - Machine Head C1074-D
COVINGTONS
$355.95A derby cover does more than protect your primary chaincase—it's a visual statement that separates a properly finished build from an incomplete one. The Covingtons Diamond Edge combines precision CNC machining with the clean aesthetics of a machine-head...11070245- SKU:
- 11070245
- Availability:
- Ships Same Business Day
- Weight:
- 2.05 LBS
- COLOR/FINISH:
- BLACK
- STYLE:
- MACHINE HEAD
- PRODUCT NAME:
- COVER
- TYPE:
- DERBY
- UNITS:
- EACH
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
- RIDING STYLE:
- STREET
$355.95 -
COVINGTONS Derby Cover - Black - Dimpled C1073-B
COVINGTONS
$216.95A quality derby cover protects your primary cover from road debris and UV exposure while adding a finished, custom appearance to your engine. The COVINGTONS Derby Cover delivers CNC-precision machining and durable billet construction, ensuring your...11070311- SKU:
- 11070311
- Availability:
- Ships Same Business Day
- Weight:
- 1.95 LBS
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- GLOSS
- COLOR/FINISH:
- POWDER-COATED
- PRODUCT NAME:
- COVER
- TYPE:
- DERBY
- UNITS:
- EACH
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
- RIDING STYLE:
- STREET
- STYLE:
- DIMPLED
$216.95Qty in Cart: 0Quantity:Price:$216.95Subtotal: -
On Sale
ARLEN NESS Derby Cover 700-006
ARLEN NESS
MSRP: $169.95Now: $154.65Was: $169.95A derby cover does more than protect your primary cover from road debris and weather—it defines your bike's aesthetic while safeguarding critical engine components. The ARLEN NESS Derby Cover 700-006 delivers precision machining and clean design without...11070651- SKU:
- 11070651
- Availability:
- Ships Same Business Day
- Weight:
- 1.95 LBS
- MATERIAL:
- BILLET ALUMINUM
- MODEL:
- 10 GAUGE
- MOUNTING STYLE:
- 5 HOLE
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- RED ANODIZED
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
MSRP: $169.95Now: $154.65Was: $169.95 -
On Sale
ARLEN NESS Derby Cover 700-007
ARLEN NESS
MSRP: $169.95Now: $154.65Was: $169.95A quality derby cover protects your engine's internal components from dirt, debris, and moisture while adding a finished aesthetic to your bike's top end. The ARLEN NESS Derby Cover 700-007 delivers both functionality and style with precision machining...11070652- SKU:
- 11070652
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- COLOR/FINISH:
- TITANIUM ANODIZED
- MATERIAL:
- BILLET ALUMINUM
- MODEL:
- 10 GAUGE
- MOUNTING STYLE:
- 5 HOLE
- PRODUCT NAME:
- DERBY COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $169.95Now: $154.65Was: $169.95 -
On Sale
ARLEN NESS Derby Cover 700-019
ARLEN NESS
MSRP: $169.95Now: $154.65Was: $169.95Machined from 6061-T6 billet aluminum, Chrome hardware and gasket included, Matching point and inspection covers available separately, Sold each11070654- SKU:
- 11070654
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- COLOR/FINISH:
- BLUE ANODIZED
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
- STYLE:
- 10 GAUGE
- PRODUCT NAME:
- DERBY COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $169.95Now: $154.65Was: $169.95 -
On Sale
ARLEN NESS Derby Cover 700-021
ARLEN NESS
MSRP: $169.95Now: $154.65Was: $169.95A quality derby cover protects your primary cover from road debris and UV exposure while maintaining the clean aesthetic of your engine bay. The ARLEN NESS 700-021 delivers precision engineering with CNC-machined construction, ensuring a factory-fit...11070656- SKU:
- 11070656
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- COLOR/FINISH:
- ORANGE ANODIZED
- STYLE:
- 10 GAUGE
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
MSRP: $169.95Now: $154.65Was: $169.95 -
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: $159.95 -
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
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.
