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 Chrome Derby Cover 33-0016K-BC427
DRAG SPECIALTIES
$42.95A derby cover serves as both functional protection and visual statement on your Harley. This Drag Specialties chrome piece shields your primary cover from road debris and weather while delivering the polished aesthetic that separates a maintained machine...DS375647- SKU:
- DS375647
- Availability:
- Ships Same Business Day
- Weight:
- 1.13 LBS
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- MOUNTING STYLE:
- 4 HOLE
- COLOR/FINISH:
- CHROME
- MATERIAL:
- DIE-CAST
- RIDING STYLE:
- STREET
$42.95Qty in Cart: 0Quantity:Price:$42.95Subtotal: -
On Sale
S&S CYCLE Transmission Side Cover 106-6479-00
S&S CYCLE
MSRP: $255.95Now: $230.36Was: $255.95If you're building a vintage-correct big-twin engine with modern reliability, this S&S Cycle transmission side cover delivers the aesthetic authenticity you want without compromising on engineering. The factory-inspired casting imperfections pair with...11070498- SKU:
- 11070498
- Availability:
- Ships Same Business Day
- Weight:
- 2.20 LBS
- COLOR/FINISH:
- UNFINISHED
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION END
- MOUNTING STYLE:
- 9 HOLE
MSRP: $255.95Now: $230.36Was: $255.95 -
LA CHOPPERS County Line Derby Cover Derby Cover - M8 Softail - Black LA-P106-02B
LA CHOPPERS
$144.99Your M8 Softail's derby cover deserves better than stock. The LA CHOPPERS County Line Derby Cover upgrades that critical engine accent to machined billet aluminum, delivering a refined look that matches the rest of your County Line setup while providing...11070717- SKU:
- 11070717
- Availability:
- Ships Same Business Day
- Weight:
- 1.16 LBS
$144.99 -
LA CHOPPERS County Line Derby Cover Derby Cover - M8 Softail - Bronze LA-P106-02Z
LA CHOPPERS
$144.99The stock derby cover on your M8 Softail can look dated and doesn't offer the visual impact your bike deserves. LA CHOPPERS' County Line Derby Cover replaces it with precision-machined billet aluminum that coordinates seamlessly with the rest of the...11070724- SKU:
- 11070724
- Availability:
- Ships Same Business Day
- Weight:
- 1.12 LBS
$144.99Qty in Cart: 0Quantity:Price:$144.99Subtotal: -
PAUGHCO Inner Primary Cover - Chrome 753E
PAUGHCO
$239.95The PAUGHCO Inner Primary Cover 753E protects your primary drive system while delivering a polished, factory-finished appearance that commands attention. Chrome plating resists corrosion and weathering, ensuring your investment maintains its aesthetic...11070188- SKU:
- 11070188
- Availability:
- Ships Same Business Day
- Weight:
- 2.05 LBS
- RIDING STYLE:
- STREET
- TYPE:
- INNER PRIMARY
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
$239.95Qty in Cart: 0Quantity:Price:$239.95Subtotal: -
On Sale
PRO-ONE PERF.MFG. Derby Cover - Millennium - Smooth 202120
PRO-ONE PERF.MFG.
MSRP: $115.45Now: $103.91Was: $115.45A derby cover serves as both protective barrier and visual statement on your engine—this billet aluminum piece shields critical internal components from debris and moisture while delivering clean aesthetics that complement any build. Pro-One's Millennium...DS375744- SKU:
- DS375744
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- UNITS:
- EACH
- MODEL:
- MILLENNIUM
- RIDING STYLE:
- STREET
- TYPE:
- DERBY
- COLOR/FINISH:
- CHROME
- MATERIAL:
- BILLET ALUMINUM
- PRODUCT NAME:
- COVER
- STYLE:
- SMOOTH
MSRP: $115.45Now: $103.91Was: $115.45 -
On Sale
PRO-ONE PERF.MFG. Derby Cover - Millennium - Ball Milled 202130
PRO-ONE PERF.MFG.
MSRP: $115.45Now: $103.91Was: $115.45A derby cover protects your engine's internal components from contamination and debris while adding a refined aesthetic to your motorcycle's top end. The PRO-ONE PERF.MFG. Millennium derby cover combines precision machining with durable billet aluminum...DS375745- SKU:
- DS375745
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- MATERIAL:
- BILLET ALUMINUM
- RIDING STYLE:
- STREET
- STYLE:
- BALL-MILLED
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- TYPE:
- DERBY
- MODEL:
- MILLENNIUM
- UNITS:
- EACH
MSRP: $115.45Now: $103.91Was: $115.45 -
TRASK Clutch Actuator Cover - Chrome - Hydraulic TM-2039CH
TRASK
$399.95Converting to hydraulic clutch actuation eliminates cable stretch and gives you consistent, predictable engagement—critical for high-horsepower builds where cable systems fail under load. This billet aluminum cover handles the transition cleanly while...11070406- SKU:
- 11070406
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- MOUNTING STYLE:
- 6 HOLE
- TRANSMISSION TYPE:
- 6-SPEED
- TYPE:
- TRANSMISSION SIDE
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$399.95 -
THRASHIN SUPPLY CO. Derby Cover - Polished - Classic TSC-3010-2
THRASHIN SUPPLY CO.
$129.95A derby cover serves as both functional protection and a visual statement on your engine. This polished aluminum piece shields your primary cover from debris and moisture while delivering the clean, purposeful aesthetic that separates a well-maintained...11070586- SKU:
- 11070586
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- MOUNTING STYLE:
- 5 HOLE
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- CHROME
- MATERIAL:
- 6061 BILLET ALUMINUM
- STYLE:
- CLASSIC
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
$129.95Qty in Cart: 0Quantity:Price:$129.95Subtotal: -
On Sale
BAKER DRIVETRAIN Transmission Cover DD7-10602-A
BAKER DRIVETRAIN
MSRP: $479.00Now: $431.10Was: $479.00Low-profile external features allow maximum exhaust clearance, 12-point stainless steel ARP bolts and gasket included, All side covers have hydraulic feed and include 1.5" diameter piston; compatible with OEM or 11/16" hydraulic master cylinders,...11070687- SKU:
- 11070687
- Availability:
- Ships Same Business Day
- Weight:
- 2.70 LBS
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION
- COLOR/FINISH:
- POLISHED
- UNITS:
- KIT
MSRP: $479.00Now: $431.10Was: $479.00 -
FEULING OIL PUMP CORP. American Derby Cover - Polished 9151
FEULING OIL PUMP CORP.
$159.95A derby cover does more than protect your primary—it's the first visual statement your motorcycle makes. The FEULING® American Derby Cover elevates your bike's appearance with precision machining and patriotic styling, while the billet aluminum...11070613- SKU:
- 11070613
- Availability:
- Ships Same Business Day
- Weight:
- 1.45 LBS
- COLOR/FINISH:
- SILVER
- COLOR/FINISH:
- POLISHED
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- DERBY
$159.95Qty in Cart: 0Quantity:Price:$159.95Subtotal: -
DRAG SPECIALTIES Inspection Cover 14009
DRAG SPECIALTIES
$20.95A quality inspection cover is essential for maintaining engine integrity and protecting critical internal components from contamination and debris. The DRAG Specialties Inspection Cover 14009 provides secure, precision-engineered access to your engine's...DS325293- SKU:
- DS325293
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- MOUNTING STYLE:
- 4 HOLE
- MATERIAL:
- STEEL
- UNITS:
- EACH
- PRODUCT NAME:
- INSPECTION COVER
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- TYPE:
- PRIMARY
$20.95Qty in Cart: 0Quantity:Price:$20.95Subtotal: -
COVINGTONS Inspection Cover - Black - Finned C1195-B
COVINGTONS
$90.95A quality inspection cover protects your engine's internal components from debris and contaminants while maintaining clean aesthetics under the hood. The finned design enhances airflow and heat dissipation, while the precision CNC-machining ensures a...11070249- SKU:
- 11070249
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- STREET
- MATERIAL:
- BILLET ALUMINUM
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- GLOSS
- COLOR/FINISH:
- POWDER-COATED
- MOUNTING STYLE:
- 4 HOLE
- PRODUCT NAME:
- COVER
- STYLE:
- FINNED
- UNITS:
- EACH
- TYPE:
- INSPECTION
$90.95 -
COVINGTONS Inspection Cover - Chrome - Finned C1195-C
COVINGTONS
$90.95A quality inspection cover serves both functional and aesthetic purposes—it protects critical internal components from debris and moisture while presenting a finished appearance that reflects your attention to detail. The COVINGTONS Inspection Cover...11070250- SKU:
- 11070250
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- MATERIAL:
- BILLET ALUMINUM
- RIDING STYLE:
- STREET
- TYPE:
- INSPECTION
- COLOR/FINISH:
- CHROME
- MOUNTING STYLE:
- 4 HOLE
- PRODUCT NAME:
- COVER
- STYLE:
- FINNED
- UNITS:
- EACH
$90.95Qty in Cart: 0Quantity:Price:$90.95Subtotal: -
COVINGTONS Derby Cover - Black - Finned C1072-B
COVINGTONS
$216.95A derby cover serves as both functional protection and visual statement on your engine. The COVINGTONS finned design dissipates heat more effectively than flat covers while adding aggressive styling that complements modern cruiser aesthetics. This...11070122- SKU:
- 11070122
- Availability:
- Ships Same Business Day
- Weight:
- 1.98 LBS
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- GLOSS
- RIDING STYLE:
- STREET
- STYLE:
- FINNED
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
- COLOR/FINISH:
- POWDER-COATED
- PRODUCT NAME:
- COVER
- TYPE:
- DERBY
- UNITS:
- EACH
$216.95Qty in Cart: 0Quantity:Price:$216.95Subtotal: -
On Sale
JOKER MACHINE Inspection Cover 10-664C
JOKER MACHINE
MSRP: $47.95Now: $43.16Was: $47.95Keep your engine bay protected and looking sharp with precision-engineered components that demand attention to detail. This inspection cover combines functional protection with a finished appearance—essential for any build where aesthetics matter as much...11070261- SKU:
- 11070261
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- STREET
- TYPE:
- INSPECTION
- MATERIAL:
- 6061 T-6 ALUMINUM
- MOUNTING STYLE:
- 2 HOLE
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- STYLE:
- FINNED
- UNITS:
- EACH
MSRP: $47.95Now: $43.16Was: $47.95 -
On Sale
JOKER MACHINE Derby Cover 06-98TC
JOKER MACHINE
MSRP: $127.95Now: $115.16Was: $127.95A quality derby cover protects your primary drivetrain from contamination while maintaining a clean, finished appearance on your Harley-Davidson. The JOKER MACHINE Derby Cover delivers both functionality and style with precision machining and domestic...11070209- SKU:
- 11070209
- Availability:
- Ships Same Business Day
- Weight:
- 0.86 LBS
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK
- MOUNTING STYLE:
- 5 HOLE
- TYPE:
- DERBY
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- COVER
- STYLE:
- FINNED
- UNITS:
- EACH
MSRP: $127.95Now: $115.16Was: $127.95 -
On Sale
JOKER MACHINE Derby Cover - Black - Joker Racing 10-692B
JOKER MACHINE
MSRP: $144.95Now: $130.46Was: $144.95A derby cover serves as both a protective barrier and a visual statement on your engine case. This Joker Machine design shields internal components from road debris and moisture while delivering the aggressive aesthetic your build demands. Precision...11070292- SKU:
- 11070292
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- COLOR/FINISH:
- BLACK ANODIZED
- RIDING STYLE:
- STREET
- STYLE:
- JOKER RACING
- TYPE:
- DERBY
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
MSRP: $144.95Now: $130.46Was: $144.95Qty in Cart: 0Quantity:Price:MSRP: $144.95Now: $130.46Was: $144.95Subtotal: -
On Sale
JOKER MACHINE Inspection Cover - Flame 921016FC
JOKER MACHINE
MSRP: $109.95Now: $98.96Was: $109.95Engine bay aesthetics matter, especially when you've invested in quality internals worth showcasing. The JOKER MACHINE Inspection Cover replaces that generic factory panel with a precision-machined piece that combines form and function—protecting your...DS375065- SKU:
- DS375065
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- RIDING STYLE:
- STREET
- TYPE:
- INSPECTION
- UNITS:
- EACH
- COLOR/FINISH:
- CHROME
- MATERIAL:
- 6061-T6 BILLET ALUMINUM
- PRODUCT NAME:
- COVER
- STYLE:
- FLAME
MSRP: $109.95Now: $98.96Was: $109.95Qty in Cart: 0Quantity:Price:MSRP: $109.95Now: $98.96Was: $109.95Subtotal: -
On Sale
JOKER MACHINE Inspection Cover - Lucky 7 921016L
JOKER MACHINE
MSRP: $109.95Now: $98.96Was: $109.95The JOKER MACHINE Inspection Cover – Lucky 7 keeps your engine bay clean while adding a custom touch that reflects your attention to detail. This CNC-machined cover protects internal components from dust and debris while maintaining easy access for...DS375261- SKU:
- DS375261
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- STYLE:
- LUCKY-7
- TYPE:
- INSPECTION
- UNITS:
- EACH
- COLOR/FINISH:
- CHROME
- MATERIAL:
- 6061-T6 BILLET ALUMINUM
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
MSRP: $109.95Now: $98.96Was: $109.95
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.
