Plug Wire
Harley Bike Plug Wires at JJ Motorsports
Boost your Harley's spark with premium plug wire sets from JJ Motorsports, featuring 10.4mm braided and chromite designs for stronger ignition, reduced resistance, and reliable performance on Sportster, Dyna, Softail, Touring, and XL models. These high-quality wires deliver hotter sparks and custom looks.
Shop Magnum, Drag Specialties, and Sumax plug wires for proven durability. Explore related categories such as Harley lights and electrical for coils and batteries, or Harley for exhaust and cams to complete your ignition upgrade.
Top Harley Plug Wires
- Magnum Spark Plug Wire Set Sterling Chromite LL FL 17-3046C – Sterling Chromite braided set for late-model FL Touring; 10.4mm core for maximum spark energy.
- Drag Specialties Plug Wires 71-E78 XL SPW2-DS – Black 8.5mm wire set for 1971-1978 XL Sportster; direct-fit with silicone insulation.
- Sumax 10.4 mm Spark Plug Wire 00-17 ST Red 40231 – Red 10.4mm silicone wire set for 2000-2017 Softail; high-voltage for Twin Cam performance.
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
-
SUMAX 10.4 mm Spark Plug Wire - '00-'17 ST - Black 40031
SUMAX
$59.95If you're running a carbureted or early fuel-injected Harley-Davidson, spark plug wire quality directly impacts ignition reliability and throttle response. SUMAX's 10.4mm wire offers the same proven construction as their 8mm counterpart but with a larger...DS242171- SKU:
- DS242171
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MODEL:
- 409 PRO RACE
- WIRE LENGTH:
- 191 MM (7-1/2')
- WIRE LENGTH:
- 51 CM (20')
- WIRE LENGTH IMPERIAL:
- 20'
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
- TYPE:
- SPARK PLUG
- UNITS:
- PAIR
- PRODUCT NAME:
- WIRE
- WIRE DIAMETER:
- 10.4 MM
- WIRE LENGTH IMPERIAL:
- 7-1/2'
$59.95 -
SUMAX 10.4 mm Spark Plug Wire - '00-'17 ST - Red 40231
SUMAX
$59.95Oversized 10.4mm spark plug wire construction delivers superior heat dissipation and electromagnetic shielding compared to standard offerings, critical for high-output ignition systems pushing peak horsepower. The larger diameter reduces resistance in...DS242174- SKU:
- DS242174
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- PRODUCT NAME:
- WIRE
- WIRE DIAMETER:
- 10.4 MM
- MODEL:
- 409 PRO RACE
- TYPE:
- SPARK PLUG
- WIRE LENGTH IMPERIAL:
- 20'
- WIRE LENGTH IMPERIAL:
- 7-1/2'
- COLOR/FINISH:
- RED
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- WIRE LENGTH:
- 191 MM (7-1/2')
- WIRE LENGTH:
- 51 CM (20')
$59.95 -
SUMAX 10.4 mm Spark Plug Wire - '00-'17 FXST - Blue 40631
SUMAX
$59.95If you're running a Harley-Davidson Softail and want ignition wires that deliver reliable spark delivery without sacrificing aesthetics, the SUMAX 10.4 mm spark plug wire set offers the perfect balance of form and function. The larger 10.4 mm diameter...DS242186- SKU:
- DS242186
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- WIRE LENGTH IMPERIAL:
- 20'
- MODEL:
- 409 PRO RACE
- COLOR/FINISH:
- BLUE
- TYPE:
- SPARK PLUG
- UNITS:
- PAIR
- PRODUCT NAME:
- WIRE
- RIDING STYLE:
- STREET
- WIRE DIAMETER:
- 10.4 MM
- WIRE LENGTH:
- 191 MM (7-1/2')
- WIRE LENGTH:
- 51 CM (20')
- WIRE LENGTH IMPERIAL:
- 7-1/2'
$59.95 -
SUMAX Spark Plug Wires - Black - FXR 77035
SUMAX
$41.95If your ignition system is running on worn carbon-core wires, you're losing voltage before it ever reaches the plugs—and that means poor combustion, rough idle, and wasted fuel economy. SUMAX Spark Plug Wires deliver 10 times the conductivity of standard...DS242142- SKU:
- DS242142
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
- CONNECTOR ANGLE:
- 90°
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK
- UNITS:
- PAIR
- WIRE DIAMETER:
- 8 MM
- WIRE LENGTH IMPERIAL:
- 12'
- PRODUCT NAME:
- WIRE
- TYPE:
- SPARK PLUG
$41.95 -
SUMAX Spark Plug Wires - Black - FL 77031
SUMAX
$41.95Factory spark plug wires are often the first ignition component to degrade, causing misfires, rough idle, and lost horsepower. SUMAX Spiro-Pro wires deliver superior conductivity and heat resistance, keeping your ignition system reliable whether you're...DS242132- SKU:
- DS242132
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- CONNECTOR ANGLE:
- -
- TYPE:
- SPARK PLUG
- WIRE LENGTH IMPERIAL:
- 16'
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- WIRE
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- WIRE DIAMETER:
- 8 MM
$41.95Qty in Cart: 0Quantity:Price:$41.95Subtotal: -
SUMAX Spark Plug Wires - Black - FXST TC 20031
SUMAX
$41.95Unreliable spark plug wires compromise ignition timing and fuel efficiency, forcing you to troubleshoot misfires and fouled plugs. SUMAX Spark Plug Wires eliminate this guesswork with Spro-Pro core technology that delivers up to 10 times the conductivity...DS242601- SKU:
- DS242601
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- SPARK PLUG
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- WIRE
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- WIRE DIAMETER:
- 8 MM
- CONNECTOR ANGLE:
- -
- WIRE LENGTH IMPERIAL:
- 19'
$41.95Qty in Cart: 0Quantity:Price:$41.95Subtotal: -
SUMAX Spark Plug Wires - Red - FLT 20233
SUMAX
$41.95If you're running a high-performance ignition system, your spark plug wires are just as critical as the plugs themselves. SUMAX's Spiro-Pro core delivers superior conductivity that reduces electrical resistance, keeping your ignition cooler and more...DS242613- SKU:
- DS242613
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- TYPE:
- SPARK PLUG
- UNITS:
- PAIR
- CONNECTOR ANGLE:
- -
- WIRE DIAMETER:
- 8 MM
- WIRE LENGTH IMPERIAL:
- 21-1/2'
- COLOR/FINISH:
- RED
- PRODUCT NAME:
- WIRE
- RIDING STYLE:
- STREET
$41.95 -
SUMAX Spark Plug Wires - Blue - '70-'99 77631
SUMAX
$41.95Your ignition system is only as reliable as your spark plug wires—and standard carbon-core wires degrade quickly under heat and high RPM stress. SUMAX Spark Plug Wires deliver superior conductivity and thermal resistance, keeping your engine firing...DS242349- SKU:
- DS242349
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- COLOR/FINISH:
- BLUE
- PRODUCT NAME:
- WIRE
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- WIRE DIAMETER:
- 8 MM
- CONNECTOR ANGLE:
- -
- TYPE:
- SPARK PLUG
- WIRE LENGTH IMPERIAL:
- 16'
$41.95 -
SUMAX Spark Plug Wires - Blue - FXR 77635
SUMAX
$41.95If you're running electronic or points-type ignition, inferior spark plug wires will cost you power, reliability, and engine life. SUMAX Spiro-Pro wires eliminate the weak link in your ignition system with superior conductivity and heat resistance,...DS242352- SKU:
- DS242352
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- COLOR/FINISH:
- BLUE
- RIDING STYLE:
- STREET
- TYPE:
- SPARK PLUG
- UNITS:
- PAIR
- PRODUCT NAME:
- WIRE
- WIRE DIAMETER:
- 8 MM
- CONNECTOR ANGLE:
- 90°
- WIRE LENGTH IMPERIAL:
- 12'
$41.95 -
SUMAX Spark Plug Wires - Blue - FLT 77633
SUMAX
$41.95Spark plug wires are a critical ignition component that directly impacts engine reliability and performance. Stock or worn wires introduce excessive resistance, causing weak spark delivery, poor combustion, and premature failure. The SUMAX Spiro-Pro core...DS242354- SKU:
- DS242354
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- STREET
- TYPE:
- SPARK PLUG
- PRODUCT NAME:
- WIRE
- COLOR/FINISH:
- BLUE
- CONNECTOR ANGLE:
- STRAIGHT
- UNITS:
- PAIR
- WIRE DIAMETER:
- 8 MM
- WIRE LENGTH IMPERIAL:
- 21-1/2'
$41.95 -
SUMAX Universal Spark Plug Wire Kit - 135 degree - Black 76083
SUMAX
$41.95Stock spark plug wires are a reliability liability—carbon-core construction degrades under heat, causing misfires and premature failure. The SUMAX Universal Spark Plug Wire Kit eliminates this weakness with Spiro-Pro core technology that delivers...DS242358- SKU:
- DS242358
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- MODEL:
- UNIVERSAL
- WIRE DIAMETER:
- 8 MM
- WIRE LENGTH IMPERIAL:
- 24'
- TYPE:
- SPARK PLUG
- UNITS:
- PAIR
- COLOR/FINISH:
- BLACK
- CONNECTOR ANGLE:
- 135°
- PRODUCT NAME:
- WIRE
- RIDING STYLE:
- STREET
$41.95 -
SUMAX Universal Spark Plug Wire Kit - 90 degree - Black 76081
SUMAX
$41.95A reliable ignition system depends on spark plug wires that can handle extreme underhood temperatures without degradation. SUMAX's Spiro-Pro core delivers significantly lower resistance than standard carbon-core alternatives, which translates to...DS242030- SKU:
- DS242030
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- PRODUCT NAME:
- WIRE
- TYPE:
- SPARK PLUG
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- WIRE DIAMETER:
- 8 MM
- CONNECTOR ANGLE:
- 90°
- MODEL:
- UNIVERSAL
- WIRE LENGTH IMPERIAL:
- 24'
$41.95Qty in Cart: 0Quantity:Price:$41.95Subtotal: -
SUMAX Universal Spark Plug Wire Kit - 90 degree - Red 76281
SUMAX
$41.95Spark plug wires are a critical ignition component that directly impacts engine reliability and performance—and inferior wires force you to replace them frequently and risk misfires under load. The SUMAX Universal Spark Plug Wire Kit eliminates that...DS242032- SKU:
- DS242032
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- TYPE:
- SPARK PLUG
- UNITS:
- PAIR
- CONNECTOR ANGLE:
- 90°
- WIRE LENGTH IMPERIAL:
- 24'
- COLOR/FINISH:
- RED
- PRODUCT NAME:
- WIRE
- RIDING STYLE:
- STREET
- MODEL:
- UNIVERSAL
- WIRE DIAMETER:
- 8 MM
$41.95 -
SUMAX Universal Spark Plug Wire Kit - 90 degree - Blue 76681
SUMAX
$41.95Unreliable spark plug wires compromise ignition timing and engine efficiency, leading to misfires, poor fuel economy, and premature component wear. The SUMAX Universal Spark Plug Wire Kit eliminates these issues with superior conductivity and heat...DS242034- SKU:
- DS242034
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- COLOR/FINISH:
- BLUE
- RIDING STYLE:
- STREET
- TYPE:
- SPARK PLUG
- UNITS:
- PAIR
- CONNECTOR ANGLE:
- -
- WIRE LENGTH IMPERIAL:
- 24'
- PRODUCT NAME:
- WIRE
- WIRE DIAMETER:
- 8 MM
$41.95 -
SUMAX Universal Spark Plug Wire Kit - 180 degree - Black 76085
SUMAX
$41.95Stock spark plug wires degrade under heat and resistance, causing misfires, poor fuel economy, and weak ignition timing. The SUMAX Universal Spark Plug Wire Kit delivers superior conductivity and thermal stability, keeping your ignition system running...DS242040- SKU:
- DS242040
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- CONNECTOR ANGLE:
- STRAIGHT
- WIRE DIAMETER:
- 8 MM
- MODEL:
- UNIVERSAL
- WIRE LENGTH IMPERIAL:
- 24'
- PRODUCT NAME:
- WIRE
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK
- TYPE:
- SPARK PLUG
- UNITS:
- PAIR
$41.95 -
SUMAX 10.4 mm Spark Plug Wire - '65-'99 FX/FL - Blue 49631
SUMAX
$59.95Clean spark plug wires are foundational to reliable ignition performance, and the SUMAX 10.4mm wires deliver the same proven dependability as their 8mm counterparts—with a more commanding visual presence in your engine bay. Built to OEM specifications...DS242118- SKU:
- DS242118
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MODEL:
- 409 PRO RACE
- WIRE LENGTH:
- 43 CM (17')
- WIRE LENGTH IMPERIAL:
- 8'
- PRODUCT NAME:
- WIRE
- RIDING STYLE:
- STREET
- WIRE DIAMETER:
- 10.4 MM
- WIRE LENGTH:
- 203 MM (8')
- WIRE LENGTH IMPERIAL:
- 17'
- COLOR/FINISH:
- BLUE
- TYPE:
- SPARK PLUG
- UNITS:
- PAIR
$59.95Qty in Cart: 0Quantity:Price:$59.95Subtotal: -
SUMAX 10.4 mm Spark Plug Wire - '65-'99 FX/FL - Black 49031
SUMAX
$59.95Proper spark plug wires are critical for reliable ignition timing and consistent combustion in vintage FX/FL models. The SUMAX 10.4mm wire delivers the same proven suppression technology as smaller-diameter alternatives, but with the classic aesthetic...DS242001- SKU:
- DS242001
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MODEL:
- 409 PRO RACE
- PRODUCT NAME:
- WIRE
- WIRE DIAMETER:
- 10.4 MM
- WIRE LENGTH IMPERIAL:
- 17'
- UNITS:
- PAIR
- WIRE LENGTH IMPERIAL:
- 8'
- TYPE:
- SPARK PLUG
- WIRE LENGTH:
- 203 MM (8')
- WIRE LENGTH:
- 43 CM (17')
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
$59.95Qty in Cart: 0Quantity:Price:$59.95Subtotal: -
SUMAX 10.4 mm Spark Plug Wire - '80-'98 FLT - Black 49033
SUMAX
$59.95Upgrading to thicker spark plug wires delivers superior spark delivery and reduced electromagnetic interference—critical for engines running high-output ignition systems or operating in harsh conditions. The SUMAX 10.4mm wire's larger diameter provides...DS242002- SKU:
- DS242002
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- WIRE
- WIRE DIAMETER:
- 10.4 MM
- MODEL:
- 409 PRO RACE
- TYPE:
- SPARK PLUG
- WIRE LENGTH:
- 40,5 CM (16')
- WIRE LENGTH IMPERIAL:
- 16'
- COLOR/FINISH:
- BLACK
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
$59.95 -
SUMAX 10.4 mm Spark Plug Wire - '82-'94 FXR - Black 49035
SUMAX
$59.95Spark plug wires are critical to ignition timing and engine reliability, especially on vintage FXR models where stock components often degrade. The SUMAX 10.4 mm design delivers the same proven suppression technology as smaller-diameter competitors while...DS242004- SKU:
- DS242004
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- WIRE
- RIDING STYLE:
- STREET
- MODEL:
- 409 PRO RACE
- WIRE LENGTH:
- 254 MM (10')
- WIRE LENGTH IMPERIAL:
- 10'
- TYPE:
- SPARK PLUG
- UNITS:
- PAIR
- WIRE DIAMETER:
- 10.4 MM
$59.95 -
SUMAX 10.4 mm Spark Plug Wire - '80-'98 FLT - Red 49233
SUMAX
$59.95Proper spark plug wires are critical for consistent ignition timing and engine reliability on your FLT—especially if you're running higher output or modified ignition systems. SUMAX's 10.4mm wires deliver the same proven performance as their 8mm...DS242011- SKU:
- DS242011
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- WIRE LENGTH IMPERIAL:
- 20'
- COLOR/FINISH:
- RED
- PRODUCT NAME:
- WIRE
- RIDING STYLE:
- STREET
- WIRE LENGTH:
- 51 CM (20')
- MODEL:
- 409 PRO RACE
- WIRE LENGTH IMPERIAL:
- 9-1/2'
- TYPE:
- SPARK PLUG
- UNITS:
- PAIR
- WIRE DIAMETER:
- 10.4 MM
- WIRE LENGTH:
- 241 MM (9-1/2')
$59.95
