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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 Exhaust Valve 20-21062K

    KIBBLEWHITE Exhaust Valve 20-21062K

    KIBBLEWHITE

    $41.29
    White Diamond™ valves are CNC machined from one-piece forgings of EV8 Stainless Steel or Inconel-751, Electroplated with a 360º anode, to produce an even coat of the highest grade hard chrome finish, Made in the U.S.A.
    09263345
    SKU:
    09263345
    Availability:
    Ships Same Business Day
    Weight:
    0.15 LBS
    MATERIAL:
    STAINLESS STEEL
    SIZE METRIC:
    OVERSIZE (+1.00 MM)
    UNITS:
    EACH
    APPLICATION:
    EXHAUST
    PRODUCT NAME:
    VALVE
    TULIP ANGLE:
    20°
    HEAD DIAMETER IMPERIAL:
    1.299'
    MODEL:
    WHITE DIAMONDâ„¢
    LENGTH IMPERIAL:
    4.055'
    RIDING STYLE:
    STREET
    STEM DIAMETER IMPERIAL:
    0.2342'
    $41.29
    Qty in Cart: 0
    Quantity:
    Price:
    $41.29
    Subtotal:
  • KIBBLEWHITE Spring Kit 20-23500

    KIBBLEWHITE Spring Kit 20-23500

    KIBBLEWHITE

    $226.58
    Spring kit is designed with increased spring rates and high lift compatibility compared to the stock springs, Compatible with boosted or turbocharged applications, CNC-machined titanium retainers and Cr-Si dual springs provide valvetrain control at high...
    09263347
    SKU:
    09263347
    Availability:
    Ships Same Business Day
    Weight:
    1.55 LBS
    RIDING STYLE:
    STREET
    APPLICATION:
    EXHAUST
    SPRING OPEN PRESSURE:
    440 LB
    TYPE:
    VALVE
    APPLICATION:
    INTAKE
    SPRING LIFT:
    0,650'
    SPRING LIFT IMPERIAL:
    0.650'
    SPRING SEAT PRESSURE:
    185 IB
    PRODUCT NAME:
    SPRING KIT
    UNITS:
    KIT
    $226.58
    Qty in Cart: 0
    Quantity:
    Price:
    $226.58
    Subtotal:
  • KIBBLEWHITE Valve Seat 10-HC541

    KIBBLEWHITE Valve Seat 10-HC541

    KIBBLEWHITE

    $14.47
    Copper-based material designed specifically for use with titanium valves in high performance applications, Give the seat excellent thermal characteristics as well as resistance to corrosion and wear, These seats are the result of a two year KPMI R&D...
    09263365
    SKU:
    09263365
    Availability:
    Ships Same Business Day
    Weight:
    0.16 LBS
    RIDING STYLE:
    STREET
    INSIDE DIAMETER IMPERIAL:
    1.800'
    OUTSIDE DIAMETER IMPERIAL:
    2.132'
    PRODUCT NAME:
    VALVE SEAT
    APPLICATION:
    EXHAUST
    APPLICATION:
    INTAKE
    UNITS:
    EACH
    $14.47
    Qty in Cart: 0
    Quantity:
    Price:
    $14.47
    Subtotal:
  • JOKER MACHINE Points Cover - Black/Chrome 02-99TC

    JOKER MACHINE Points Cover - Black/Chrome 02-99TC

    JOKER MACHINE

    $65.95
    Include mounting screws, Made in the U.S.A.
    09400996
    SKU:
    09400996
    Availability:
    Ships Same Business Day
    Weight:
    0.22 LBS
    COLOR/FINISH:
    ANODIZED
    MATERIAL:
    BILLET ALUMINUM
    TYPE:
    POINT
    COLOR/FINISH:
    BLACK
    PRODUCT NAME:
    COVER
    RIDING STYLE:
    STREET
    STYLE:
    FINNED
    UNITS:
    EACH
    COLOR/FINISH:
    SILVER
    $65.95
    Qty in Cart: 0
    Quantity:
    Price:
    $65.95
    Subtotal:
  • GARDNER-WESTCOTT Male Elbow - 1/4" x 1/8" - Chrome 7-91HB-4X2

    GARDNER-WESTCOTT Male Elbow - 1/4" x 1/8" - Chrome 7-91HB-4X2

    GARDNER-WESTCOTT

    $12.95
    Chrome finish, Made in the U.S.A.
    DS245260
    SKU:
    DS245260
    Availability:
    Ships Same Business Day
    Weight:
    0.05 LBS
    CONNECTION TYPE:
    1/4' HOSE FITTING
    TYPE:
    HOSE
    CONNECTOR ANGLE:
    90°
    PRODUCT NAME:
    FITTING
    CONNECTION TYPE:
    1/8' NPT (MALE)
    COLOR/FINISH:
    CHROME
    RIDING STYLE:
    STREET
    UNITS:
    EACH
    $12.95
    Qty in Cart: 0
    Quantity:
    Price:
    $12.95
    Subtotal:
  • GARDNER-WESTCOTT 90 Fitting - 1/8" NPT 7-116PSE-2

    GARDNER-WESTCOTT 90 Fitting - 1/8" NPT 7-116PSE-2

    GARDNER-WESTCOTT

    $8.95
    Chrome finish, Made in the U.S.A.
    DS245205
    SKU:
    DS245205
    Availability:
    Ships Same Business Day
    Weight:
    0.05 LBS
    COLOR/FINISH:
    CHROME
    UNITS:
    EACH
    CONNECTOR ANGLE:
    90°
    PRODUCT NAME:
    FITTING
    RIDING STYLE:
    STREET
    TYPE:
    OIL PUMP
    CONNECTION TYPE:
    1/8' NPT (MALE)
    $8.95
    Qty in Cart: 0
    Quantity:
    Price:
    $8.95
    Subtotal:
  • KIBBLEWHITE Intake Valve Guide 20-2120 KIBBLEWHITE Intake Valve Guide 20-2120

    KIBBLEWHITE Intake Valve Guide 20-2120

    KIBBLEWHITE

    $31.71
    Precision-machined from C630, Compatible with no-lead fuel and accept any type of valve-stem material, Provide maximum service with chromed valve stems, Feature a tapered nose design for maximum bearing service and minimal port obstruction; improves flow...
    09260318
    SKU:
    09260318
    Availability:
    Ships Same Business Day
    Weight:
    0.08 LBS
    INSIDE DIAMETER IMPERIAL:
    0.3085'
    PRODUCT NAME:
    VALVE GUIDE
    MATERIAL:
    C630 BRONZE
    APPLICATION:
    INTAKE
    COLOR/FINISH:
    BRONZE
    RIDING STYLE:
    STREET
    SIZE IMPERIAL:
    STANDARD
    BASE COLOR:
    BROWN
    OUTSIDE DIAMETER IMPERIAL:
    0.5620'
    UNITS:
    EACH
    $31.71
    Qty in Cart: 0
    Quantity:
    Price:
    $31.71
    Subtotal:
  • KIBBLEWHITE Intake Valve Guide 20-2121

    KIBBLEWHITE Intake Valve Guide 20-2121

    KIBBLEWHITE

    $31.71
    Precision-machined from C630, Compatible with no-lead fuel and accept any type of valve-stem material, Provide maximum service with chromed valve stems, Feature a tapered nose design for maximum bearing service and minimal port obstruction; improves flow...
    09260319
    SKU:
    09260319
    Availability:
    Ships Same Business Day
    Weight:
    0.09 LBS
    MATERIAL:
    C630 BRONZE
    PRODUCT NAME:
    VALVE GUIDE
    RIDING STYLE:
    STREET
    BASE COLOR:
    BROWN
    INSIDE DIAMETER IMPERIAL:
    0.3085'
    OUTSIDE DIAMETER IMPERIAL:
    0.5630'
    SIZE IMPERIAL:
    OVERSIZE (+0.001')
    APPLICATION:
    INTAKE
    COLOR/FINISH:
    BRONZE
    UNITS:
    EACH
    $31.71
    Qty in Cart: 0
    Quantity:
    Price:
    $31.71
    Subtotal:
  • KIBBLEWHITE Exhaust Valve Guide 20-2130

    KIBBLEWHITE Exhaust Valve Guide 20-2130

    KIBBLEWHITE

    $31.71
    Precision-machined from C630, Compatible with no-lead fuel and accept any type of valve-stem material, Provide maximum service with chromed valve stems, Feature a tapered nose design for maximum bearing service and minimal port obstruction; improves flow...
    09260320
    SKU:
    09260320
    Availability:
    Ships Same Business Day
    Weight:
    0.09 LBS
    BASE COLOR:
    BROWN
    MATERIAL:
    C630 BRONZE
    OUTSIDE DIAMETER IMPERIAL:
    0.5620'
    RIDING STYLE:
    STREET
    SIZE IMPERIAL:
    STANDARD
    APPLICATION:
    EXHAUST
    INSIDE DIAMETER IMPERIAL:
    0.3085'
    PRODUCT NAME:
    VALVE GUIDE
    UNITS:
    EACH
    COLOR/FINISH:
    BRONZE
    $31.71
    Qty in Cart: 0
    Quantity:
    Price:
    $31.71
    Subtotal:
  • KIBBLEWHITE Exhaust Valve Guide 20-2131

    KIBBLEWHITE Exhaust Valve Guide 20-2131

    KIBBLEWHITE

    $31.71
    Precision-machined from C630, Compatible with no-lead fuel and accept any type of valve-stem material, Provide maximum service with chromed valve stems, Feature a tapered nose design for maximum bearing service and minimal port obstruction; improves flow...
    09260321
    SKU:
    09260321
    Availability:
    Ships Same Business Day
    Weight:
    0.09 LBS
    MATERIAL:
    C630 BRONZE
    PRODUCT NAME:
    VALVE GUIDE
    SIZE IMPERIAL:
    OVERSIZE (+0.001')
    BASE COLOR:
    BROWN
    INSIDE DIAMETER IMPERIAL:
    0.3085'
    OUTSIDE DIAMETER IMPERIAL:
    0.5630'
    APPLICATION:
    EXHAUST
    RIDING STYLE:
    STREET
    COLOR/FINISH:
    BRONZE
    UNITS:
    EACH
    $31.71
    Qty in Cart: 0
    Quantity:
    Price:
    $31.71
    Subtotal:
  • KIBBLEWHITE Cast Iron Valve Seat - Intake - Evolution 10-SC510

    KIBBLEWHITE Cast Iron Valve Seat - Intake - Evolution 10-SC510

    KIBBLEWHITE

    $12.62
    Tests have proven that the machinability, wear and thermal conductivity surpasses all standards, Compatible with all fuel blends, Made in the U.S.A.
    09260323
    SKU:
    09260323
    Availability:
    Ships Same Business Day
    Weight:
    0.17 LBS
    APPLICATION:
    INTAKE
    INSIDE DIAMETER IMPERIAL:
    1.562'
    UNITS:
    EACH
    PRODUCT NAME:
    VALVE SEAT
    RIDING STYLE:
    STREET
    VALVE SEAT HEIGHT IMPERIAL:
    0.450'
    MATERIAL:
    CAST IRON
    OUTSIDE DIAMETER IMPERIAL:
    2.007'
    $12.62
    Qty in Cart: 0
    Quantity:
    Price:
    $12.62
    Subtotal:
  • KIBBLEWHITE Cast Iron Valve Seat - Intake - Evolution 10-SC541

    KIBBLEWHITE Cast Iron Valve Seat - Intake - Evolution 10-SC541

    KIBBLEWHITE

    $13.18
    Tests have proven that the machinability, wear and thermal conductivity surpasses all standards, Compatible with all fuel blends, Made in the U.S.A.
    09260324
    SKU:
    09260324
    Availability:
    Ships Same Business Day
    Weight:
    0.16 LBS
    APPLICATION:
    INTAKE
    UNITS:
    EACH
    VALVE SEAT HEIGHT IMPERIAL:
    0.450'
    INSIDE DIAMETER IMPERIAL:
    1.690'
    PRODUCT NAME:
    VALVE SEAT
    RIDING STYLE:
    STREET
    MATERIAL:
    CAST IRON
    OUTSIDE DIAMETER IMPERIAL:
    2.1320'
    $13.18
    Qty in Cart: 0
    Quantity:
    Price:
    $13.18
    Subtotal:
  • ANDREWS N6 Cam - XL 298165

    ANDREWS N6 Cam - XL 298165

    ANDREWS

    $504.95
    Cams run to 6500 rpm with stock hydraulic lifters; recommend solids not be installed, Stock base circle sizes allow the use of stock pushrods, Made in the U.S.A., N6 designed for modified 1200s to 80" and/or high-compression pistons: stock springs and...
    DS199114
    SKU:
    DS199114
    Availability:
    Ships Same Business Day
    Weight:
    4.30 LBS
    EXHAUST CLOSE IMPERIAL:
    28°
    EXHAUST LOBE CENTERLINE IMPERIAL:
    104°
    GRIND:
    N6
    INTAKE OPEN IMPERIAL:
    34°
    APPLICATION:
    EXHAUST
    EXHAUST OPEN IMPERIAL:
    56°
    INTAKE LIFT AT TDC IMPERIAL:
    0.241'
    INTAKE LIFT IMPERIAL:
    0.500'
    TYPE:
    CHAIN
    APPLICATION:
    INTAKE
    EXHAUST DURATION IMPERIAL:
    264°
    EXHAUST LIFT IMPERIAL:
    0.500'
    INTAKE LOBE CENTERLINE IMPERIAL:
    98°
    PRODUCT NAME:
    CAM KIT
    RIDING STYLE:
    STREET
    EXHAUST LIFT AT TDC IMPERIAL:
    0.212'
    INTAKE CLOSE IMPERIAL:
    50°
    INTAKE DURATION IMPERIAL:
    264°
    UNITS:
    4 PACK
    $504.95
    Qty in Cart: 0
    Quantity:
    Price:
    $504.95
    Subtotal:
  • ANDREWS Cam Set 288126G

    ANDREWS Cam Set 288126G

    ANDREWS

    $463.95
    Cams work well with fuel injection or carburetor models, Run best with low restriction exhausts (1700-5200 rpm), Works well with carbs or fuel injection, Bolt-in cam for more torque with stock compression, Can be used with stock valve springs and...
    DS199117
    SKU:
    DS199117
    Availability:
    Ships Same Business Day
    Weight:
    2.70 LBS
    EXHAUST OPEN IMPERIAL:
    41°
    GRIND:
    26 SERIES
    INTAKE OPEN IMPERIAL:
    11°
    PRODUCT NAME:
    CAM KIT
    RIDING STYLE:
    STREET
    APPLICATION:
    INTAKE
    EXHAUST LIFT IMPERIAL:
    0.490'
    EXHAUST LOBE CENTERLINE IMPERIAL:
    106°
    INTAKE DURATION IMPERIAL:
    226°
    INTAKE LIFT AT TDC IMPERIAL:
    0.138'
    TYPE:
    GEAR
    EXHAUST CLOSE IMPERIAL:
    9°
    EXHAUST DURATION IMPERIAL:
    266°
    EXHAUST LIFT AT TDC IMPERIAL:
    0.120'
    INTAKE CLOSE IMPERIAL:
    35°
    INTAKE LOBE CENTERLINE IMPERIAL:
    102°
    UNITS:
    PAIR
    APPLICATION:
    EXHAUST
    INTAKE LIFT IMPERIAL:
    0.490'
    $463.95
    Qty in Cart: 0
    Quantity:
    Price:
    $463.95
    Subtotal:
  • ANDREWS Cam - M450 - M8 217450

    ANDREWS Cam - M450 - M8 217450

    ANDREWS

    $268.95
    Bolt-in cam for stock compression 107" and 114" engines, For touring-style riding, Bolt-in cam for stock compression 107" and 114" engines, Also for 117" big bore kits with higher compression, Great low to mid RPM power (1700-5500 rpm), For more...
    09251165
    SKU:
    09251165
    Availability:
    Ships Same Business Day
    Weight:
    1.80 LBS
    APPLICATION:
    INTAKE
    EXHAUST LIFT IMPERIAL:
    0.450'
    RIDING STYLE:
    STREET
    UNITS:
    EACH
    APPLICATION:
    EXHAUST
    INTAKE LIFT IMPERIAL:
    0.080'
    PRODUCT NAME:
    CAM
    TYPE:
    CHAIN
    $268.95
    Qty in Cart: 0
    Quantity:
    Price:
    $268.95
    Subtotal:
  • ANDREWS Cam - M504 - M8 217504

    ANDREWS Cam - M504 - M8 217504

    ANDREWS

    $268.95
    Bolt-in cam for stock compression 107" and 114" engines, For touring-style riding, Bolt-in cam for stock compression 107" and 114" engines, Also for 117" big bore kits with higher compression, Great low to mid RPM power (1700-5500 rpm), For more...
    09251167
    SKU:
    09251167
    Availability:
    Ships Same Business Day
    Weight:
    1.80 LBS
    INTAKE DURATION IMPERIAL:
    216°
    RIDING STYLE:
    STREET
    APPLICATION:
    EXHAUST
    EXHAUST OPEN IMPERIAL:
    56°
    INTAKE CLOSE IMPERIAL:
    30°
    INTAKE LIFT IMPERIAL:
    0.105'
    INTAKE OPEN IMPERIAL:
    6°
    TYPE:
    CHAIN
    EXHAUST CLOSE IMPERIAL:
    0°
    EXHAUST DURATION IMPERIAL:
    236°
    EXHAUST LIFT IMPERIAL:
    0.504'
    PRODUCT NAME:
    CAM
    UNITS:
    EACH
    APPLICATION:
    INTAKE
    $268.95
    Qty in Cart: 0
    Quantity:
    Price:
    $268.95
    Subtotal:
  • ANDREWS Cam Sprocket 216324

    ANDREWS Cam Sprocket 216324

    ANDREWS

    $73.95
    Made in the U.S.A.
    09251204
    SKU:
    09251204
    Availability:
    Ships Same Business Day
    Weight:
    0.21 LBS
    TYPE:
    SPROCKET
    UNITS:
    EACH
    PRODUCT NAME:
    CAMSHAFT
    RIDING STYLE:
    STREET
    $73.95
    Qty in Cart: 0
    Quantity:
    Price:
    $73.95
    Subtotal:
  • ANDREWS Performance Cam 269420

    ANDREWS Performance Cam 269420

    ANDREWS

    $851.95
    ANDREWS Performance Cam
    09251368
    SKU:
    09251368
    Availability:
    Ships Same Business Day
    Weight:
    5.54 LBS
    RIDING STYLE:
    STREET
    PRODUCT NAME:
    CAM
    UNITS:
    EACH
    $851.95
    Qty in Cart: 0
    Quantity:
    Price:
    $851.95
    Subtotal:
  • ANDREWS Valve Spring Collars - Big Twin 293115

    ANDREWS Valve Spring Collars - Big Twin 293115

    ANDREWS

    $89.95
    Provide .050" more spring travel than stock, Stronger and lighter than stock, Use stock keepers, Made in the U.S.A.
    09261439
    SKU:
    09261439
    Availability:
    Ships Same Business Day
    Weight:
    0.26 LBS
    RIDING STYLE:
    STREET
    UNITS:
    4 PACK
    PRODUCT NAME:
    SPRING COLLAR
    APPLICATION:
    EXHAUST
    TYPE:
    VALVE
    APPLICATION:
    INTAKE
    $89.95
    Qty in Cart: 0
    Quantity:
    Price:
    $89.95
    Subtotal:
  • ANDREWS Cam Drive Gear - Big Twin 212055

    ANDREWS Cam Drive Gear - Big Twin 212055

    ANDREWS

    $69.95
    High-quality heat-treated gears, Made in the U.S.A.
    09250579
    SKU:
    09250579
    Availability:
    Ships Same Business Day
    Weight:
    0.70 LBS
    PRODUCT NAME:
    DRIVE GEAR
    DIAMETER IMPERIAL:
    2.7354'
    RIDING STYLE:
    STREET
    UNITS:
    EACH
    TYPE:
    CAMSHAFT
    $69.95
    Qty in Cart: 0
    Quantity:
    Price:
    $69.95
    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

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