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
$44.24A 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
$44.24 -
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: $255.95Qty in Cart: 0Quantity:Price:MSRP: $255.95Now: $230.36Was: $255.95Subtotal: -
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: -
PRO-ONE PERF.MFG. Derby Cover - Millennium - Smooth 202120
PRO-ONE PERF.MFG.
$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
$115.45 -
PRO-ONE PERF.MFG. Derby Cover - Millennium - Ball Milled 202130
PRO-ONE PERF.MFG.
$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
$115.45Qty in Cart: 0Quantity:Price:$115.45Subtotal: -
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
$399.95Qty in Cart: 0Quantity:Price:$399.95Subtotal: -
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: -
BAKER DRIVETRAIN Transmission Cover DD7-10602-A
BAKER DRIVETRAIN
$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
$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
$159.95 -
DRAG SPECIALTIES Inspection Cover 14009
DRAG SPECIALTIES
$21.58A 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
$21.58Qty in Cart: 0Quantity:Price:$21.58Subtotal: -
On Sale
COVINGTONS Derby Cover - Diamond Edge - Machine Head C1076-D
COVINGTONS
MSRP: $406.95Now: $260.00Was: $406.95CNC-machined from billet aluminum, Includes mounting hardware, Made in the U.S.A.11070494- SKU:
- 11070494
- Availability:
- Ships Same Business Day
- Weight:
- 2.15 LBS
- MATERIAL:
- BILLET ALUMINUM
- MOUNTING STYLE:
- 5 HOLE
- STYLE:
- MACHINE HEAD
- TYPE:
- DERBY
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $406.95Now: $260.00Was: $406.95Qty in Cart: 0Quantity:Price:MSRP: $406.95Now: $260.00Was: $406.95Subtotal: -
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: -
FEULING OIL PUMP CORP. American Derby Cover - Black 9162
FEULING OIL PUMP CORP.
$159.95Your motorcycle's primary cover is one of the most visible components on your bike—why settle for stock? The FEULING OIL PUMP CORP. American Derby Cover replaces that factory cover with precision-machined billet aluminum, instantly elevating your...11070616- SKU:
- 11070616
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- UNITS:
- EACH
- COLOR/FINISH:
- GLOSS
- TYPE:
- DERBY
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
$159.95Qty in Cart: 0Quantity:Price:$159.95Subtotal: -
DRAG SPECIALTIES Chrome Inspection Cover 210305
DRAG SPECIALTIES
$25.70A clean, professional engine bay starts with quality details—and this billet aluminum inspection cover delivers both durability and polished aesthetics. CNC-machined from solid billet stock, it resists corrosion and maintains its finish through years of...11070106- SKU:
- 11070106
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- MATERIAL:
- BILLET ALUMINUM
- RIDING STYLE:
- STREET
- TYPE:
- PRIMARY
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- INSPECTION COVER
- UNITS:
- KIT
$25.70Qty in Cart: 0Quantity:Price:$25.70Subtotal: -
DRAG SPECIALTIES Primary Cover 210366
DRAG SPECIALTIES
$364.57Engine bay protection starts with a reliable primary cover that shields internal components from debris, moisture, and contamination during operation. The Drag Specialties Primary Cover 210366 delivers die-cast aluminum construction that resists...11070285- SKU:
- 11070285
- Availability:
- Ships Same Business Day
- Weight:
- 5.80 LBS
- COLOR/FINISH:
- BLACK
- MATERIAL:
- ALUMINUM
- MATERIAL:
- DIE-CAST
- TYPE:
- PRIMARY
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- SATIN
$364.57 -
DRAG SPECIALTIES 5-Hole - Chrome - Live to Ride Derby Cover D33-0110CA
DRAG SPECIALTIES
$108.10A quality derby cover does more than protect your engine—it's a statement about how you maintain your machine. The Drag Specialties 5-Hole Chrome Derby Cover combines reliable engine protection with classic styling that complements any cruiser build. The...11070554- SKU:
- 11070554
- Availability:
- Ships Same Business Day
- Weight:
- 1.45 LBS
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
- PRODUCT NAME:
- DERBY COVER
- MOUNTING STYLE:
- 5 HOLE
- RIDING STYLE:
- STREET
- MODEL:
- LIVE TO RIDE
- STYLE:
- EAGLE WITH BANNER
$108.10 -
DRAG SPECIALTIES Matte Black Derby Cover D33-0110MB
DRAG SPECIALTIES
$109.13A clean, professional derby cover protects your primary chaincase from debris and weather while delivering the aggressive aesthetic that defines modern Big Twin styling. This die-cast cover combines durability with a refined matte black finish that...11070557- SKU:
- 11070557
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- MOUNTING STYLE:
- 5 HOLE
- MATERIAL:
- ALUMINUM
- MATERIAL:
- DIE-CAST
- PRODUCT NAME:
- DERBY COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- COLOR/FINISH:
- MATTE BLACK
$109.13 -
DRAG SPECIALTIES Inspection Cover - Chrome - '85-'94 FXR 33-0009A
DRAG SPECIALTIES
$46.30Keep your FXR's engine bay looking showroom-fresh while protecting critical internal components from dirt and debris. This chrome-plated inspection cover delivers the clean, finished appearance that separates a well-maintained machine from a neglected...11070389- SKU:
- 11070389
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- TYPE:
- PRIMARY
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
- MATERIAL:
- STEEL
- PRODUCT NAME:
- INSPECTION COVER
- MOUNTING STYLE:
- 4 HOLE
- RIDING STYLE:
- STREET
$46.30Qty in Cart: 0Quantity:Price:$46.30Subtotal:
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.
