Select Your Ride

1
2
3

Harley Engine

Harley Engine

Harley Engine

Harley Bike Engine Parts at JJ Motorsports

Rebuild and boost your Harley's engine with premium parts from JJ Motorsports. Our inventory features complete gasket sets, piston kits, oil filters, pushrod tubes, and coolers designed for maximum strength, leak-free sealing, and high-performance in extreme conditions. Compatible with Big Twins, Softail, Touring, and more, these components support top-end overhauls, oil management, and durability for street rides or custom builds.

Shop trusted brands like Drag Specialties for magnetic filters and Wiseco for forged pistons. Explore related categories such as Harley air and fuel for carb tuning or Harley drivetrain for transmission upgrades.

Top Harley Engine Products

Browse our in-stock inventory below with same-day shipping and expert support. Questions? Contact us for fitment advice!

  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • KIBBLEWHITE Cast Iron Valve Guide 20-4096C

    KIBBLEWHITE Cast Iron Valve Guide 20-4096C

    KIBBLEWHITE

    $9.67
    Precision-machined from cast iron, Compatible with no-lead fuel and accept any type of valve-stem material, Overall length of both intake and exhaust is 1.90", Made in the U.S.A.
    09262794
    SKU:
    09262794
    Availability:
    Ships Same Business Day
    Weight:
    0.10 LBS
    INSIDE DIAMETER IMPERIAL:
    0.3755'
    RIDING STYLE:
    STREET
    SIZE IMPERIAL:
    OVERSIZE (+0.002')
    APPLICATION:
    EXHAUST
    MATERIAL:
    CAST IRON
    OUTSIDE DIAMETER IMPERIAL:
    0.6440'
    PRODUCT NAME:
    VALVE GUIDE
    UNITS:
    EACH
    $9.67
    Qty in Cart: 0
    Quantity:
    Price:
    $9.67
    Subtotal:
  • KIBBLEWHITE Intake Valve - 1200 XL 20-20260 KIBBLEWHITE Intake Valve - 1200 XL 20-20260

    KIBBLEWHITE Intake Valve - 1200 XL 20-20260

    KIBBLEWHITE

    $54.10
    One-piece stainless-steel, stellite-tipped valves impregnated by a special nitrided process with .002" depth and .0002" surface buildup to improve wear properties and reduce friction, This process provides resistance to corrosion; wears superior to hard...
    09262866
    SKU:
    09262866
    Availability:
    Ships Same Business Day
    Weight:
    0.19 LBS
    APPLICATION:
    INTAKE
    LENGTH IMPERIAL:
    4.525'
    UNITS:
    EACH
    MATERIAL:
    STAINLESS STEEL
    MODEL:
    BLACK DIAMONDâ„¢
    PRODUCT NAME:
    VALVE
    HEAD DIAMETER IMPERIAL:
    1.805'
    RIDING STYLE:
    STREET
    TULIP ANGLE:
    28°
    STEM DIAMETER IMPERIAL:
    7.00 MM
    $54.10
    Qty in Cart: 0
    Quantity:
    Price:
    $54.10
    Subtotal:
  • KIBBLEWHITE Exhaust Valve - 1200 XL 20-20265

    KIBBLEWHITE Exhaust Valve - 1200 XL 20-20265

    KIBBLEWHITE

    $54.10
    One-piece stainless-steel, stellite-tipped valves impregnated by a special nitrided process with .002" depth and .0002" surface buildup to improve wear properties and reduce friction, This process provides resistance to corrosion; wears superior to hard...
    09262868
    SKU:
    09262868
    Availability:
    Ships Same Business Day
    Weight:
    0.15 LBS
    MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    VALVE
    UNITS:
    EACH
    APPLICATION:
    EXHAUST
    HEAD DIAMETER IMPERIAL:
    1.575'
    MODEL:
    BLACK DIAMONDâ„¢
    RIDING STYLE:
    STREET
    LENGTH IMPERIAL:
    4.610'
    TULIP ANGLE:
    34°
    STEM DIAMETER IMPERIAL:
    7.00 MM
    $54.10
    Qty in Cart: 0
    Quantity:
    Price:
    $54.10
    Subtotal:
  • KIBBLEWHITE Exhaust Valve - 883/1200 XL 20-20555 KIBBLEWHITE Exhaust Valve - 883/1200 XL 20-20555

    KIBBLEWHITE Exhaust Valve - 883/1200 XL 20-20555

    KIBBLEWHITE

    $54.10
    One-piece stainless-steel, stellite-tipped valves impregnated by a special nitrided process with .002" depth and .0002" surface buildup to improve wear properties and reduce friction, This process provides resistance to corrosion; wears superior to hard...
    09262871
    SKU:
    09262871
    Availability:
    Ships Same Business Day
    Weight:
    0.20 LBS
    LENGTH IMPERIAL:
    4.660'
    TULIP ANGLE:
    40°
    MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    VALVE
    APPLICATION:
    EXHAUST
    HEAD DIAMETER IMPERIAL:
    1.480'
    MODEL:
    BLACK DIAMONDâ„¢
    RIDING STYLE:
    STREET
    STEM DIAMETER IMPERIAL:
    7.00 MM
    UNITS:
    EACH
    $54.10
    Qty in Cart: 0
    Quantity:
    Price:
    $54.10
    Subtotal:
  • JAMES GASKET Drive Gear Seal - Big Twin 12077

    JAMES GASKET Drive Gear Seal - Big Twin 12077

    JAMES GASKET

    $19.90
    Top quality main drive gear shaft seals
    09350405
    SKU:
    09350405
    Availability:
    Ships Same Business Day
    Weight:
    0.10 LBS
    PRODUCT NAME:
    SEAL
    APPLICATION:
    MAIN DRIVE GEAR
    RIDING STYLE:
    STREET
    UNITS:
    5 PACK
    $19.90
    Qty in Cart: 0
    Quantity:
    Price:
    $19.90
    Subtotal:
  • JAMES GASKET Solenoid Seal - FL/FLH 60645-65-X

    JAMES GASKET Solenoid Seal - FL/FLH 60645-65-X

    JAMES GASKET

    $8.50
    Made in the U.S.A.
    09350242
    SKU:
    09350242
    Availability:
    Ships Same Business Day
    Weight:
    0.11 LBS
    APPLICATION:
    INNER PRIMARY
    PRODUCT NAME:
    X-RING
    TYPE:
    QUAD SEAL
    APPLICATION:
    SOLENOID
    RIDING STYLE:
    STREET
    UNITS:
    10 PACK
    $8.50
    Qty in Cart: 0
    Quantity:
    Price:
    $8.50
    Subtotal:
  • JAMES GASKET Fuel Filter O-Ring 11351

    JAMES GASKET Fuel Filter O-Ring 11351

    JAMES GASKET

    $21.50
    Made in the U.S.A.
    09350245
    SKU:
    09350245
    Availability:
    Ships Same Business Day
    Weight:
    0.11 LBS
    RIDING STYLE:
    STREET
    PRODUCT NAME:
    O-RING
    TYPE:
    FUEL PUMP
    UNITS:
    25 PACK
    APPLICATION:
    FUEL FILTER
    $21.50
    Qty in Cart: 0
    Quantity:
    Price:
    $21.50
    Subtotal:
  • JAMES GASKET Foam Primary Cover Gasket 34955-04-F

    JAMES GASKET Foam Primary Cover Gasket 34955-04-F

    JAMES GASKET

    $36.95
    Top quality gaskets, seals and o-rings meet or exceed OEM specifications, Primary gasket features silicone beading, Made in the U.S.A.
    09350249
    SKU:
    09350249
    Availability:
    Ships Same Business Day
    Weight:
    0.30 LBS
    MATERIAL:
    FOAMET
    RIDING STYLE:
    STREET
    PRODUCT NAME:
    GASKET
    UNITS:
    EACH
    TYPE:
    PRIMARY COVER
    $36.95
    Qty in Cart: 0
    Quantity:
    Price:
    $36.95
    Subtotal:
  • JAMES GASKET Fork Seal Kit - 49 mm 45849-01-VR JAMES GASKET Fork Seal Kit - 49 mm 45849-01-VR

    JAMES GASKET Fork Seal Kit - 49 mm 45849-01-VR

    JAMES GASKET

    $35.95
    Comes with everything needed to replace leaking fork seals, Made in the U.S.A.
    09350253
    SKU:
    09350253
    Availability:
    Ships Same Business Day
    Weight:
    0.32 LBS
    $35.95
    Qty in Cart: 0
    Quantity:
    Price:
    $35.95
    Subtotal:
  • FEULING OIL PUMP CORP. Gear Drive Cam - 630 Series 1010

    FEULING OIL PUMP CORP. Gear Drive Cam - 630 Series 1010

    FEULING OIL PUMP CORP.

    $399.95
    Carburetor and or throttle body work required along with a performance exhaust and intake system, Maintains low end performance with eye-blurring mid and top end power, High-performance valve springs, pushrods and lifters required, 2500-6900+ RPM power...
    09250431
    SKU:
    09250431
    Availability:
    Ships Same Business Day
    Weight:
    2.80 LBS
    PRODUCT NAME:
    CAMSHAFT
    UNITS:
    PAIR
    APPLICATION:
    INTAKE
    EXHAUST CLOSE IMPERIAL:
    19°
    EXHAUST OPEN IMPERIAL:
    64°
    INTAKE DURATION IMPERIAL:
    258°
    INTAKE LIFT IMPERIAL:
    0.630'
    INTAKE OPEN IMPERIAL:
    20°
    RIDING STYLE:
    STREET
    TYPE:
    GEAR
    EXHAUST DURATION IMPERIAL:
    263°
    GRIND:
    630 SERIES
    APPLICATION:
    EXHAUST
    EXHAUST LIFT IMPERIAL:
    0.630'
    INTAKE CLOSE IMPERIAL:
    58°
    MODEL:
    REAPER
    $399.95
    Qty in Cart: 0
    Quantity:
    Price:
    $399.95
    Subtotal:
  • FEULING OIL PUMP CORP. Race Series Camshaft Kit 7210P

    FEULING OIL PUMP CORP. Race Series Camshaft Kit 7210P

    FEULING OIL PUMP CORP.

    $1,879.95
    FEULING OIL PUMP CORP. Race Series Camshaft Kit
    09251381
    SKU:
    09251381
    Availability:
    Ships Same Business Day
    Weight:
    11.26 LBS
    PRODUCT NAME:
    CAMSHAFT KIT
    UNITS:
    KIT
    MODEL:
    RACE SERIES®
    RIDING STYLE:
    STREET
    TYPE:
    GEAR
    GRIND:
    630 SERIES
    $1,879.95
    Qty in Cart: 0
    Quantity:
    Price:
    $1,879.95
    Subtotal:
  • FEULING OIL PUMP CORP. Race Series Camshaft Kit 7270

    FEULING OIL PUMP CORP. Race Series Camshaft Kit 7270

    FEULING OIL PUMP CORP.

    $2,049.95
    FEULING OIL PUMP CORP. Race Series Camshaft Kit
    09251417
    SKU:
    09251417
    Availability:
    Ships Same Business Day
    Weight:
    11.40 LBS
    RIDING STYLE:
    STREET
    GRIND:
    538 SERIES
    PRODUCT NAME:
    CAMSHAFT KIT
    TYPE:
    CHAIN
    UNITS:
    KIT
    MODEL:
    RACE SERIES®
    $2,049.95
    Qty in Cart: 0
    Quantity:
    Price:
    $2,049.95
    Subtotal:
  • FEULING OIL PUMP CORP. Race Series Camshaft Kit 7270ST

    FEULING OIL PUMP CORP. Race Series Camshaft Kit 7270ST

    FEULING OIL PUMP CORP.

    $2,069.95
    FEULING OIL PUMP CORP. Race Series Camshaft Kit
    09251418
    SKU:
    09251418
    Availability:
    Ships Same Business Day
    Weight:
    11.45 LBS
    PRODUCT NAME:
    CAMSHAFT KIT
    RIDING STYLE:
    STREET
    UNITS:
    KIT
    MODEL:
    RACE SERIES®
    TYPE:
    CHAIN
    GRIND:
    538 SERIES
    $2,069.95
    Qty in Cart: 0
    Quantity:
    Price:
    $2,069.95
    Subtotal:
  • FEULING OIL PUMP CORP. Race Series Camshaft Kit 7271

    FEULING OIL PUMP CORP. Race Series Camshaft Kit 7271

    FEULING OIL PUMP CORP.

    $2,049.95
    FEULING OIL PUMP CORP. Race Series Camshaft Kit
    09251419
    SKU:
    09251419
    Availability:
    Ships Same Business Day
    Weight:
    11.70 LBS
    PRODUCT NAME:
    CAMSHAFT KIT
    RIDING STYLE:
    STREET
    GRIND:
    538 SERIES
    MODEL:
    RACE SERIES®
    TYPE:
    CHAIN
    UNITS:
    KIT
    Qty in Cart: 0
    Quantity:
    Price:
    $2,049.95
    Subtotal:
  • FEULING OIL PUMP CORP. Valve Seals 1075

    FEULING OIL PUMP CORP. Valve Seals 1075

    FEULING OIL PUMP CORP.

    $15.95
    High-quality Viton® valve seals, Designed to handle high engine temperatures with a built-in spring-loaded wiper to clean excess oil from valve stem with minimal friction, Include four seals and seal installer tool, Made in the U.S.A.
    09261166
    SKU:
    09261166
    Availability:
    Ships Same Business Day
    Weight:
    0.05 LBS
    APPLICATION:
    EXHAUST
    TYPE:
    VALVE
    MATERIAL:
    VITON
    PRODUCT NAME:
    SEAL
    UNITS:
    4 PACK
    APPLICATION:
    INTAKE
    RIDING STYLE:
    STREET
    $15.95
    Qty in Cart: 0
    Quantity:
    Price:
    $15.95
    Subtotal:
  • FEULING OIL PUMP CORP. Valve Seals - Twin Cam 1076

    FEULING OIL PUMP CORP. Valve Seals - Twin Cam 1076

    FEULING OIL PUMP CORP.

    $15.95
    High-quality Viton® valve seals, Designed to handle high engine temperatures with a built-in spring-loaded wiper to clean excess oil from valve stem with minimal friction, Include four seals and seal installer tool, Made in the U.S.A.
    09261167
    SKU:
    09261167
    Availability:
    Ships Same Business Day
    Weight:
    0.10 LBS
    APPLICATION:
    INTAKE
    APPLICATION:
    EXHAUST
    TYPE:
    VALVE
    PRODUCT NAME:
    SEAL
    MATERIAL:
    VITON
    RIDING STYLE:
    STREET
    UNITS:
    4 PACK
    $15.95
    Qty in Cart: 0
    Quantity:
    Price:
    $15.95
    Subtotal:
  • ROUGH CRAFTS Black Cam Cover - Grooved RC-610-002

    ROUGH CRAFTS Black Cam Cover - Grooved RC-610-002

    ROUGH CRAFTS

    $359.95
    CNC machined from forged billet aluminum, Designed for M8 Engines, Mounting hardware included
    09401958
    SKU:
    09401958
    Availability:
    Ships Same Business Day
    Weight:
    1.66 LBS
    RIDING STYLE:
    STREET
    COLOR/FINISH:
    BLACK
    TYPE:
    CAM
    UNITS:
    EACH
    MATERIAL:
    BILLET ALUMINUM
    PRODUCT NAME:
    COVER
    STYLE:
    GROOVED
    $359.95
    Qty in Cart: 0
    Quantity:
    Price:
    $359.95
    Subtotal:
  • ROUGH CRAFTS Chrome Cam Cover - Grooved RC-610-003

    ROUGH CRAFTS Chrome Cam Cover - Grooved RC-610-003

    ROUGH CRAFTS

    $359.95
    CNC machined from forged billet aluminum, Designed for M8 Engines, Mounting hardware included
    09401959
    SKU:
    09401959
    Availability:
    Ships Same Business Day
    Weight:
    1.51 LBS
    TYPE:
    CAM
    UNITS:
    EACH
    COLOR/FINISH:
    CHROME
    PRODUCT NAME:
    COVER
    RIDING STYLE:
    STREET
    MATERIAL:
    BILLET ALUMINUM
    STYLE:
    GROOVED
    $359.95
    Qty in Cart: 0
    Quantity:
    Price:
    $359.95
    Subtotal:
  • THRASHIN SUPPLY CO. Point Cover - Dish - Polished - Twin Cam TSC-3026-2

    THRASHIN SUPPLY CO. Point Cover - Dish - Polished - Twin Cam TSC-3026-2

    THRASHIN SUPPLY CO.

    $59.95
    Made in the U.S.A., 6061 billet aluminum construction
    09401716
    SKU:
    09401716
    Availability:
    Ships Same Business Day
    Weight:
    0.15 LBS
    MATERIAL:
    BILLET ALUMINUM
    TYPE:
    POINT
    RIDING STYLE:
    STREET
    STYLE:
    DISHED
    COLOR/FINISH:
    POLISHED
    PRODUCT NAME:
    COVER
    UNITS:
    EACH
    $59.95
    Qty in Cart: 0
    Quantity:
    Price:
    $59.95
    Subtotal:
  • THRASHIN SUPPLY CO. Point Cover - Dish - Black - Twin Cam TSC-3026-4

    THRASHIN SUPPLY CO. Point Cover - Dish - Black - Twin Cam TSC-3026-4

    THRASHIN SUPPLY CO.

    $59.95
    Made in the U.S.A., 6061 billet aluminum construction
    09401717
    SKU:
    09401717
    Availability:
    Ships Same Business Day
    Weight:
    0.15 LBS
    MATERIAL:
    BILLET ALUMINUM
    COLOR/FINISH:
    BLACK
    PRODUCT NAME:
    COVER
    UNITS:
    EACH
    RIDING STYLE:
    STREET
    STYLE:
    DISHED
    TYPE:
    POINT
    $59.95
    Qty in Cart: 0
    Quantity:
    Price:
    $59.95
    Subtotal:
  • Total: items /

Adding your products to cart

Big Power, Nice Sound!

Picked up a Pro Circuit pipe and silencer for my YZ125 it’s a game changer. The power feels way better and the sound is awesome.

Tyler D. - 06/12

Perfect Fit

First time ordering here and dang y’all knocked it outta the park! The wheels fit my Ranger UTV perfect, and I’ll definitely be back for more 5 stars all day!

Sarah L. - 08/24

Fast Shipping!!

Ordered on a Monday, and it was on my doorstep by Wednesday! Super impressed with how fast the shipping was.

Jason P. - 09/13

Helps keep cool, works great!

Bought the dual pass Allstar radiator for my build, and it’s been solid. Keeps the engine running cool even on the hottest days no complaints here!

Jake M. - 05/21

SECURE & SAFE PAYMENT

EASY RETURNS

FAST DELIVERY

AUTHORIZED DEALER