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S&S CYCLE

S&S CYCLE

S&S CYCLE

Shop S&S Cycle Harley-Davidson Performance Parts: Big Bore Kits, Engines & Exhaust at JJ Motorsports

Discover legendary S&S Cycle performance parts, the premier USA-based manufacturer of high-horsepower motorcycle engines and components since 1958. Founded by George J. Smith and Stanley Stankos, S&S is the go-to brand for serious Harley-Davidson builders and racers seeking maximum power, reliability, and American-made quality. From complete long-block engines and big bore top-end kits to flywheels, cams, carburetors, and race-proven exhaust systems, S&S delivers groundbreaking innovations like the T143 engine, MK45 mufflers, and Shovelhead-style heads that transform stock Harleys into fire-breathing machines.

At JJ Motorsports, we stock the full line of S&S Cycle parts at competitive prices with fast shipping. Build more cubic inches, add serious torque, or upgrade your exhaust note with the brand trusted by champions for over 65 years. Explore related categories such as motorcycle engines and components for complete builds or motorcycle exhaust for power gains.

Top S&S Cycle Products

  • S&S Cycle Top End Kit - Big Twin 90-0097 – Complete bolt-on top-end kit with Shovelhead-style heads, stock bore cylinders, 8:1 forged pistons, gaskets, and hardware — no machining required for instant big-inch power.
  • S&S Cycle Flywheel Assembly 320-0598 – Forged steel flywheel assembly with keyed 6" tapered sprocket shaft, balanced to stock HD 80" pistons, includes crankpin and connecting rods — built for high-performance and custom applications.
  • S&S Cycle 4-1/2" Chrome MK45 Cutlass Performance Mufflers 550-1011 – Bold 4-1/2" chrome mufflers with stainless steel baffles, RaceTEX packing for deep bass rumble, removable dB reducer, and 50-state legal — massive looks with serious performance gains.

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
  • S&S CYCLE Flywheel Assembly 320-0605

    S&S CYCLE Flywheel Assembly 320-0605

    S&S CYCLE

    $1,995.95
    Made of high-strength forged steel and designed for stock and high-performance custom applications, Special keyed 6° large diameter tapered sprocket shaft that provides more contact area for...
    09220168
    SKU:
    09220168
    Availability:
    Ships Same Business Day
    Weight:
    46.90 LBS
    MATERIAL:
    FORGED STEEL
    PRODUCT NAME:
    FLYWHEEL ASSEMBLY
    FEATURES:
    FULL WRIST PIN
    STROKE LENGTH IMPERIAL:
    4-5/8'
    UNITS:
    EACH
    RIDING STYLE:
    STREET
    $1,995.95
    Qty in Cart: 0
    Quantity:
    Price:
    $1,995.95
    Subtotal:
  • S&S CYCLE Replacement Rings 94-2208X

    S&S CYCLE Replacement Rings 94-2208X

    S&S CYCLE

    $54.95
    Replacement rings come as sets for two pistons, Made in the U.S.A.
    09120091
    SKU:
    09120091
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    RIDING STYLE:
    STREET
    PRODUCT NAME:
    PISTON RING
    TYPE:
    REPLACEMENT
    UNITS:
    SET
    BORE SIZE IMPERIAL:
    3.4375'
    PISTON SIZE IMPERIAL:
    +0.080'
    $54.95
    Qty in Cart: 0
    Quantity:
    Price:
    $54.95
    Subtotal:
  • S&S CYCLE Replacement Rings 94-2209X

    S&S CYCLE Replacement Rings 94-2209X

    S&S CYCLE

    $54.95
    Replacement ring set for S&S Pistons
    09120092
    SKU:
    09120092
    Availability:
    Ships Same Business Day
    Weight:
    0.20 LBS
    RIDING STYLE:
    STREET
    TYPE:
    REPLACEMENT
    BORE SIZE IMPERIAL:
    3.4375'
    PISTON SIZE IMPERIAL:
    +0.090'
    PRODUCT NAME:
    PISTON RING
    UNITS:
    SET
    $54.95
    Qty in Cart: 0
    Quantity:
    Price:
    $54.95
    Subtotal:
  • S&S CYCLE Replacement Rings 94-1200X

    S&S CYCLE Replacement Rings 94-1200X

    S&S CYCLE

    $54.95
    Replacement ring set for S&S Pistons
    09120093
    SKU:
    09120093
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    TYPE:
    REPLACEMENT
    UNITS:
    SET
    RIDING STYLE:
    STREET
    BORE SIZE IMPERIAL:
    3.625'
    PISTON SIZE IMPERIAL:
    STANDARD
    PRODUCT NAME:
    PISTON RING
    $54.95
    Qty in Cart: 0
    Quantity:
    Price:
    $54.95
    Subtotal:
  • S&S CYCLE Replacement Rings 94-1201X

    S&S CYCLE Replacement Rings 94-1201X

    S&S CYCLE

    $54.95
    Replacement ring set for S&S Pistons
    09120094
    SKU:
    09120094
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    PISTON SIZE IMPERIAL:
    +0.010'
    RIDING STYLE:
    STREET
    TYPE:
    REPLACEMENT
    UNITS:
    SET
    BORE SIZE IMPERIAL:
    3.625'
    PRODUCT NAME:
    PISTON RING
    $54.95
    Qty in Cart: 0
    Quantity:
    Price:
    $54.95
    Subtotal:
  • S&S CYCLE Replacement Rings 94-1213X

    S&S CYCLE Replacement Rings 94-1213X

    S&S CYCLE

    $64.95
    Replacement ring set for S&S Pistons
    09120098
    SKU:
    09120098
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    UNITS:
    SET
    BORE SIZE IMPERIAL:
    3.625'
    PRODUCT NAME:
    PISTON RING
    PISTON SIZE IMPERIAL:
    +0.030'
    RIDING STYLE:
    STREET
    TYPE:
    REPLACEMENT
    $64.95
    Qty in Cart: 0
    Quantity:
    Price:
    $64.95
    Subtotal:
  • S&S CYCLE Piston Rings 106-3709A

    S&S CYCLE Piston Rings 106-3709A

    S&S CYCLE

    $74.95
    Replacement rings come as sets for two pistons, Made in the U.S.A.
    09120640
    SKU:
    09120640
    Availability:
    Ships Same Business Day
    Weight:
    0.15 LBS
    TYPE:
    REPLACEMENT
    PISTON SIZE IMPERIAL:
    STANDARD
    PRODUCT NAME:
    PISTON RING
    BORE SIZE IMPERIAL:
    3.927'
    RIDING STYLE:
    STREET
    UNITS:
    SET
    $74.95
    Qty in Cart: 0
    Quantity:
    Price:
    $74.95
    Subtotal:
  • S&S CYCLE Piston Rings 940-0014

    S&S CYCLE Piston Rings 940-0014

    S&S CYCLE

    $85.95
    Replacement rings come as sets for two pistons, Made in the U.S.A.
    09120641
    SKU:
    09120641
    Availability:
    Ships Same Business Day
    Weight:
    0.15 LBS
    BORE SIZE IMPERIAL:
    4.125'
    RIDING STYLE:
    STREET
    PRODUCT NAME:
    PISTON RING
    TYPE:
    REPLACEMENT
    PISTON SIZE IMPERIAL:
    STANDARD
    UNITS:
    SET
    $85.95
    Qty in Cart: 0
    Quantity:
    Price:
    $85.95
    Subtotal:
  • S&S CYCLE Piston Rings 940-0013

    S&S CYCLE Piston Rings 940-0013

    S&S CYCLE

    $84.95
    Replacement rings come as sets for two pistons, Made in the U.S.A.
    09120646
    SKU:
    09120646
    Availability:
    Ships Same Business Day
    Weight:
    0.15 LBS
    TYPE:
    REPLACEMENT
    UNITS:
    SET
    PRODUCT NAME:
    PISTON RING
    BORE SIZE IMPERIAL:
    4.125'
    RIDING STYLE:
    STREET
    PISTON SIZE IMPERIAL:
    +0.020'
    $84.95
    Qty in Cart: 0
    Quantity:
    Price:
    $84.95
    Subtotal:
  • S&S CYCLE Clips 94-9254

    S&S CYCLE Clips 94-9254

    S&S CYCLE

    $7.95
    For use with S&S Cycle forged pistons
    09130244
    SKU:
    09130244
    Availability:
    Ships Same Business Day
    Weight:
    0.05 LBS
    TYPE:
    PIN
    UNITS:
    4 PACK
    PRODUCT NAME:
    CIRCLIP
    APPLICATION:
    PISTON
    RIDING STYLE:
    STREET
    $7.95
    Qty in Cart: 0
    Quantity:
    Price:
    $7.95
    Subtotal:
  • S&S CYCLE REED VALVE, 93-99 STD 31-2096

    S&S CYCLE REED VALVE, 93-99 STD 31-2096

    S&S CYCLE

    $165.95
    New-style breather is not dependent on the rotation of the crankshaft to make it open and close. Instead, reeds open when pressure in the crankcase becomes greater than pressure in the cam chest, and...
    09200008
    SKU:
    09200008
    Availability:
    Ships Same Business Day
    Weight:
    0.21 LBS
    COLOR/FINISH:
    SILVER
    DIAMETER - THREAD SIZE IMPERIAL:
    STANDARD
    PRODUCT NAME:
    BREATHER VALVE
    RIDING STYLE:
    STREET
    TYPE:
    CRANKCASE
    UNITS:
    EACH
    BASE COLOR:
    SILVER
    $165.95
    Qty in Cart: 0
    Quantity:
    Price:
    $165.95
    Subtotal:
  • S&S CYCLE REED VALVE, 84-99 +.030 31-2100

    S&S CYCLE REED VALVE, 84-99 +.030 31-2100

    S&S CYCLE

    $171.95
    New-style breather is not dependent on the rotation of the crankshaft to make it open and close. Instead, reeds open when pressure in the crankcase becomes greater than pressure in the cam chest, and...
    09200009
    SKU:
    09200009
    Availability:
    Ships Same Business Day
    Weight:
    0.20 LBS
    COLOR/FINISH:
    SILVER
    PRODUCT NAME:
    BREATHER VALVE
    RIDING STYLE:
    STREET
    TYPE:
    CRANKCASE
    UNITS:
    EACH
    DIAMETER - THREAD SIZE IMPERIAL:
    +0.030'
    BASE COLOR:
    SILVER
    $171.95
    Qty in Cart: 0
    Quantity:
    Price:
    $171.95
    Subtotal:
  • S&S CYCLE Standard Pistons 92-1210

    S&S CYCLE Standard Pistons 92-1210

    S&S CYCLE

    $546.95
    These forged 3-7/8" bore stroker pistons for 1999-'16 HD® Big Twin are required for the S&S 106" stock bore stroker kit with 4-1/2" stroke flywheels, They are compatible with stock or S&S® Super...
    09200001
    SKU:
    09200001
    Availability:
    Ships Same Business Day
    Weight:
    2.95 LBS
    BORE - OVERSIZE:
    STANDARD
    BORE OVERSIZE - IMPERIAL:
    STANDARD
    UNITS:
    SET
    BORE SIZE IMPERIAL:
    3.875'
    DISPLACEMENT:
    106'
    RIDING STYLE:
    STREET
    STROKE LENGTH IMPERIAL:
    4-1/2'
    PISTON MATERIAL:
    FORGED ALUMINUM
    PRODUCT NAME:
    PISTON KIT
    $546.95
    Qty in Cart: 0
    Quantity:
    Price:
    $546.95
    Subtotal:
  • S&S CYCLE Engine Case - Twin Cam 310-0369

    S&S CYCLE Engine Case - Twin Cam 310-0369

    S&S CYCLE

    $2,155.95
    Replacement Twin Cam "A" engine cases for stock H-D chassis only (carb and EFI), Feature greater overall strength than stock crankcases, Strong, dependable Timken®-style sprocket shaft bearings,...
    09200093
    SKU:
    09200093
    Availability:
    Ships Same Business Day
    Weight:
    35.80 LBS
    BASE COLOR:
    BLACK
    BASE FINISH:
    POWDER-COATED
    BORE SIZE IMPERIAL:
    4.125'
    COLOR/FINISH:
    BLACK
    COLOR/FINISH:
    POWDER-COATED
    PRODUCT NAME:
    ENGINE CASE
    RIDING STYLE:
    STREET
    UNITS:
    EACH
    Qty in Cart: 0
    Quantity:
    Price:
    $2,155.95
    Subtotal:
  • S&S CYCLE Super Stock¢â€žÂ¢ Engine Case 31-0055

    S&S CYCLE Super Stock¢â€žÂ¢ Engine Case 31-0055

    S&S CYCLE

    $1,995.95
    Cast from A356 T-6 heat-treated aluminum alloy, Machined to accept an oil filter assembly that mounts on the front of stock motor cases, All races are line-honed and breather cavity is...
    09200063
    SKU:
    09200063
    Availability:
    Ships Same Business Day
    Weight:
    29.38 LBS
    COLOR/FINISH:
    BLACK
    MATERIAL:
    A356 T-6 ALUMINUM ALLOY
    RIDING STYLE:
    STREET
    BORE SIZE IMPERIAL:
    3.500'
    UNITS:
    KIT
    COLOR/FINISH:
    POWDER-COATED
    MODEL:
    SUPER STOCK®
    PRODUCT NAME:
    ENGINE CASE
    $1,995.95
    Qty in Cart: 0
    Quantity:
    Price:
    $1,995.95
    Subtotal:
  • S&S CYCLE Super Stock¢â€žÂ¢ Engine Case 31-0078

    S&S CYCLE Super Stock¢â€žÂ¢ Engine Case 31-0078

    S&S CYCLE

    $1,995.95
    Cast from A356 T-6 heat-treated aluminum alloy, Machined to accept an oil filter assembly that mounts on the front of stock motor cases, All races are line-honed and breather cavity is...
    09200064
    SKU:
    09200064
    Availability:
    Ships Same Business Day
    Weight:
    29.00 LBS
    RIDING STYLE:
    STREET
    COLOR/FINISH:
    BLACK
    PRODUCT NAME:
    ENGINE CASE
    UNITS:
    KIT
    BORE SIZE IMPERIAL:
    3.625'
    MATERIAL:
    A356 T-6 ALUMINUM ALLOY
    COLOR/FINISH:
    POWDER-COATED
    MODEL:
    SUPER STOCK®
    $1,995.95
    Qty in Cart: 0
    Quantity:
    Price:
    $1,995.95
    Subtotal:
  • S&S CYCLE Crankcase - Black 310-0878

    S&S CYCLE Crankcase - Black 310-0878

    S&S CYCLE

    $2,195.95
    Stock or 4-1/8" bore crankcases to be used as a foundation for a custom engine or replacement for T111, T124, or T143, Stock looking, but stronger; thicker wall sections and superior 356-T6 aircraft...
    09200155
    SKU:
    09200155
    Availability:
    Ships Same Business Day
    Weight:
    35.80 LBS
    MATERIAL:
    356 T-6 ALUMINUM
    BASE COLOR:
    BLACK
    BORE SIZE IMPERIAL:
    STANDARD
    COLOR/FINISH:
    POWDER-COATED
    MODEL:
    SUPER STOCK
    PRODUCT NAME:
    CRANKCASE
    RIDING STYLE:
    STREET
    UNITS:
    EACH
    BASE FINISH:
    POWDER-COATED
    COLOR/FINISH:
    BLACK
    $2,195.95
    Qty in Cart: 0
    Quantity:
    Price:
    $2,195.95
    Subtotal:
  • S&S CYCLE Crankcase - Black 310-0856

    S&S CYCLE Crankcase - Black 310-0856

    S&S CYCLE

    $2,245.95
    Stock or 4-1/8" bore crankcases to be used as a foundation for a custom engine or replacement for T111, T124, or T143, Stock looking, but stronger; thicker wall sections and superior 356-T6 aircraft...
    09200157
    SKU:
    09200157
    Availability:
    Ships Same Business Day
    Weight:
    35.40 LBS
    BASE COLOR:
    BLACK
    PRODUCT NAME:
    CRANKCASE
    MATERIAL:
    356 T-6 ALUMINUM
    BASE FINISH:
    POWDER-COATED
    BORE SIZE IMPERIAL:
    4.125'
    COLOR/FINISH:
    BLACK
    COLOR/FINISH:
    POWDER-COATED
    MODEL:
    SUPER STOCK
    RIDING STYLE:
    STREET
    UNITS:
    EACH
    $2,245.95
    Qty in Cart: 0
    Quantity:
    Price:
    $2,245.95
    Subtotal:
  • S&S CYCLE Special Application Crankcase 31-0047

    S&S CYCLE Special Application Crankcase 31-0047

    S&S CYCLE

    $1,995.95
    Cam chest is moved outward .250" to allow crankcases to handle large cylinder bore sizes, Relocated cam chest oil pick-up increases gear case scavenging and virtually eliminates oil carry-over at...
    09200158
    SKU:
    09200158
    Availability:
    Ships Same Business Day
    Weight:
    34.20 LBS
    PRODUCT NAME:
    CRANKCASE
    RIDING STYLE:
    STREET
    UNITS:
    KIT
    $1,995.95
    Qty in Cart: 0
    Quantity:
    Price:
    $1,995.95
    Subtotal:
  • S&S CYCLE Crankcase - Natural 31-0008

    S&S CYCLE Crankcase - Natural 31-0008

    S&S CYCLE

    $2,195.95
    Cast from A356 T-6 heat-treated aluminum alloy, Include crankcase bolts, washers and nuts, cylinder mounting studs, timing hole plug, magnetic drain plug, assorted breather and oil line fittings, top...
    09200124
    SKU:
    09200124
    Availability:
    Ships Same Business Day
    Weight:
    31.40 LBS
    COLOR/FINISH:
    NATURAL
    MATERIAL:
    A356 T-6 ALUMINUM ALLOY
    MODEL:
    SUPER STOCK®
    PRODUCT NAME:
    ENGINE CASE
    RIDING STYLE:
    STREET
    TYPE:
    GENERATOR
    UNITS:
    KIT
    $2,195.95
    Qty in Cart: 0
    Quantity:
    Price:
    $2,195.95
    Subtotal:
  • S&S CYCLE Crankcase - Black 31-0052

    S&S CYCLE Crankcase - Black 31-0052

    S&S CYCLE

    $1,995.95
    Cast from A356 T-6 heat-treated aluminum alloy, Include crankcase bolts, washers and nuts, cylinder mounting studs, timing hole plug, magnetic drain plug, assorted breather and oil line fittings, top...
    09200132
    SKU:
    09200132
    Availability:
    Ships Same Business Day
    Weight:
    29.65 LBS
    BORE SIZE IMPERIAL:
    3.500'
    COLOR/FINISH:
    BLACK
    UNITS:
    KIT
    MATERIAL:
    ALUMINUM
    MODEL:
    SUPER STOCK®
    RIDING STYLE:
    STREET
    PRODUCT NAME:
    ENGINE CASE
    $1,995.95
    Qty in Cart: 0
    Quantity:
    Price:
    $1,995.95
    Subtotal:
  • S&S CYCLE Breather Valve - Twin Cam 310-0742

    S&S CYCLE Breather Valve - Twin Cam 310-0742

    S&S CYCLE

    $152.95
    Solves the problem of oil carryover in Twin Cam "A" motors with stock oil pump, Oil carryover is oil that comes out of your breather and all over your bike, Easy-to-install when changing cams or...
    09200136
    SKU:
    09200136
    Availability:
    Ships Same Business Day
    Weight:
    0.45 LBS
    PRODUCT NAME:
    BREATHER VALVE
    RIDING STYLE:
    STREET
    TYPE:
    CRANKCASE
    UNITS:
    EACH
    $152.95
    Qty in Cart: 0
    Quantity:
    Price:
    $152.95
    Subtotal:
  • S&S CYCLE Magnetic Oil Drain Plug 50-8335

    S&S CYCLE Magnetic Oil Drain Plug 50-8335

    S&S CYCLE

    $19.95
    Made in the U.S.A.
    09200141
    SKU:
    09200141
    Availability:
    Ships Same Business Day
    Weight:
    0.05 LBS
    FEATURES:
    MAGNETIC
    PRODUCT NAME:
    PLUG
    RIDING STYLE:
    STREET
    UNITS:
    EACH
    DIAMETER - THREAD SIZE IMPERIAL:
    1/2-20
    TYPE:
    OIL DRAIN
    $19.95
    Qty in Cart: 0
    Quantity:
    Price:
    $19.95
    Subtotal:
  • S&S CYCLE Engine Case 310-0367A

    S&S CYCLE Engine Case 310-0367A

    S&S CYCLE

    $2,195.95
    Replacement Twin Cam "A" engine cases for stock H-D chassis only (carb and EFI), Feature greater overall strength than stock crankcases, Strong, dependable Timken®-style sprocket shaft bearings,...
    09200142
    SKU:
    09200142
    Availability:
    Ships Same Business Day
    Weight:
    35.80 LBS
    PRODUCT NAME:
    ENGINE CASE
    BASE COLOR:
    BLACK
    COLOR/FINISH:
    POWDER-COATED
    UNITS:
    EACH
    BASE FINISH:
    POWDER-COATED
    BORE SIZE IMPERIAL:
    3.750'
    COLOR/FINISH:
    BLACK
    RIDING STYLE:
    STREET
    $2,195.95
    Qty in Cart: 0
    Quantity:
    Price:
    $2,195.95
    Subtotal:
  • S&S CYCLE Nut Crankpin 1-20 Black 34-2104

    S&S CYCLE Nut Crankpin 1-20 Black 34-2104

    S&S CYCLE

    $14.95
    Designed to fit L81-99 S&S® flywheels, Made in the U.S.A.
    09200148
    SKU:
    09200148
    Availability:
    Ships Same Business Day
    Weight:
    0.10 LBS
    BASE COLOR:
    BLACK
    BASE FINISH:
    MATTE
    MEASUREMENT SYSTEM:
    SAE
    APPLICATION:
    FLYWHEEL
    RIDING STYLE:
    STREET
    TYPE:
    CRANKPIN
    UNITS:
    EACH
    PRODUCT NAME:
    NUT
    $14.95
    Qty in Cart: 0
    Quantity:
    Price:
    $14.95
    Subtotal:
  • S&S CYCLE Flywheel Assembly - Big Twin 32-2239

    S&S CYCLE Flywheel Assembly - Big Twin 32-2239

    S&S CYCLE

    $1,595.95
    Made of high-strength forged steel and designed for stock and high-performance custom applications, Special keyed 6° large diameter tapered sprocket shaft that provides more contact area for...
    09210250
    SKU:
    09210250
    Availability:
    Ships Same Business Day
    Weight:
    36.75 LBS
    ENGINE TYPE:
    4-STROKE
    MATERIAL:
    STEEL
    PRODUCT NAME:
    FLYWHEEL ASSEMBLY
    UNITS:
    EACH
    RIDING STYLE:
    STREET
    STROKE LENGTH IMPERIAL:
    4-1/4'
    $1,595.95
    Qty in Cart: 0
    Quantity:
    Price:
    $1,595.95
    Subtotal:
  • S&S CYCLE Engine Case 31-0172A

    S&S CYCLE Engine Case 31-0172A

    S&S CYCLE

    $2,195.95
    Replacement Twin Cam "A" engine cases for stock H-D chassis only (carb and EFI), Feature greater overall strength than stock crankcases, Strong, dependable Timken®-style sprocket shaft bearings,...
    09200187
    SKU:
    09200187
    Availability:
    Ships Same Business Day
    Weight:
    33.80 LBS
    BASE COLOR:
    BLACK
    COLOR/FINISH:
    BLACK
    PRODUCT NAME:
    ENGINE CASE
    RIDING STYLE:
    STREET
    BORE SIZE IMPERIAL:
    STANDARD
    UNITS:
    EACH
    $2,195.95
    Qty in Cart: 0
    Quantity:
    Price:
    $2,195.95
    Subtotal:
  • S&S CYCLE Engine Case 31-0181A

    S&S CYCLE Engine Case 31-0181A

    S&S CYCLE

    $2,155.95
    Replacement Twin Cam "A" engine cases for stock H-D chassis only (carb and EFI), Feature greater overall strength than stock crankcases, Strong, dependable Timken®-style sprocket shaft bearings,...
    09200188
    SKU:
    09200188
    Availability:
    Ships Same Business Day
    Weight:
    33.30 LBS
    BASE FINISH:
    WRINKLE BLACK
    BORE SIZE IMPERIAL:
    4.125'
    COLOR/FINISH:
    BLACK
    PRODUCT NAME:
    CRANKCASE
    RIDING STYLE:
    STREET
    BASE COLOR:
    BLACK
    UNITS:
    EACH
    $2,155.95
    Qty in Cart: 0
    Quantity:
    Price:
    $2,155.95
    Subtotal:
  • S&S CYCLE Crankpin - Big Twin 34-2007

    S&S CYCLE Crankpin - Big Twin 34-2007

    S&S CYCLE

    $163.95
    Include crankpin, nuts and key, Made in the U.S.A.
    09210160
    SKU:
    09210160
    Availability:
    Ships Same Business Day
    Weight:
    1.35 LBS
    RIDING STYLE:
    STREET
    MATERIAL:
    STEEL
    PRODUCT NAME:
    CRANKPIN ASSEMBLY
    TYPE:
    OVERSIZED
    UNITS:
    EACH
    $163.95
    Qty in Cart: 0
    Quantity:
    Price:
    $163.95
    Subtotal:
  • S&S CYCLE Crankpin - Big Twin 34-2102

    S&S CYCLE Crankpin - Big Twin 34-2102

    S&S CYCLE

    $163.95
    Include crankpin, nuts and key, Made in the U.S.A.
    09210161
    SKU:
    09210161
    Availability:
    Ships Same Business Day
    Weight:
    1.50 LBS
    RIDING STYLE:
    STREET
    UNITS:
    EACH
    PRODUCT NAME:
    CRANKPIN ASSEMBLY
    TYPE:
    STANDARD
    MATERIAL:
    STEEL
    $163.95
    Qty in Cart: 0
    Quantity:
    Price:
    $163.95
    Subtotal:
  • S&S CYCLE Crankpin - Big Twin 34-2103

    S&S CYCLE Crankpin - Big Twin 34-2103

    S&S CYCLE

    $163.95
    Include crankpin, nuts and key, Made in the U.S.A.
    09210162
    SKU:
    09210162
    Availability:
    Ships Same Business Day
    Weight:
    1.50 LBS
    RIDING STYLE:
    STREET
    MATERIAL:
    STEEL
    PRODUCT NAME:
    CRANKPIN ASSEMBLY
    TYPE:
    OVERSIZED
    UNITS:
    EACH
    $163.95
    Qty in Cart: 0
    Quantity:
    Price:
    $163.95
    Subtotal:
  • S&S CYCLE Crankpin - XL 34-2503

    S&S CYCLE Crankpin - XL 34-2503

    S&S CYCLE

    $245.95
    Include crankpin, nuts and key, Made in the U.S.A.
    09210163
    SKU:
    09210163
    Availability:
    Ships Same Business Day
    Weight:
    1.10 LBS
    TYPE:
    STANDARD
    MATERIAL:
    STEEL
    PRODUCT NAME:
    CRANKPIN ASSEMBLY
    UNITS:
    EACH
    RIDING STYLE:
    STREET
    $245.95
    Qty in Cart: 0
    Quantity:
    Price:
    $245.95
    Subtotal:
  • S&S CYCLE Crankpin - XL 34-2602

    S&S CYCLE Crankpin - XL 34-2602

    S&S CYCLE

    $189.95
    Include crankpin, nuts and key, Made in the U.S.A.
    09210164
    SKU:
    09210164
    Availability:
    Ships Same Business Day
    Weight:
    1.05 LBS
    TYPE:
    STANDARD
    RIDING STYLE:
    STREET
    PRODUCT NAME:
    CRANKSHAFT ASSEMBLY
    MATERIAL:
    STEEL
    UNITS:
    EACH
    $189.95
    Qty in Cart: 0
    Quantity:
    Price:
    $189.95
    Subtotal:
  • S&S CYCLE Pinion Shaft - Big Twin 33-2021

    S&S CYCLE Pinion Shaft - Big Twin 33-2021

    S&S CYCLE

    $205.95
    Includes shaft, nut and keys, Made in the U.S.A.
    09210166
    SKU:
    09210166
    Availability:
    Ships Same Business Day
    Weight:
    0.95 LBS
    MATERIAL:
    STEEL
    UNITS:
    EACH
    PRODUCT NAME:
    PINION SHAFT ASSEMBLY
    RIDING STYLE:
    STREET
    $205.95
    Qty in Cart: 0
    Quantity:
    Price:
    $205.95
    Subtotal:
  • S&S CYCLE Pinion Shaft - Big Twin 33-2024

    S&S CYCLE Pinion Shaft - Big Twin 33-2024

    S&S CYCLE

    $199.95
    Includes shaft, nut and keys, Made in the U.S.A.
    09210167
    SKU:
    09210167
    Availability:
    Ships Same Business Day
    Weight:
    1.15 LBS
    MATERIAL:
    STEEL
    UNITS:
    EACH
    RIDING STYLE:
    STREET
    PRODUCT NAME:
    PINION SHAFT ASSEMBLY
    $199.95
    Qty in Cart: 0
    Quantity:
    Price:
    $199.95
    Subtotal:
  • S&S CYCLE Pinion Shaft - Big Twin 33-2027

    S&S CYCLE Pinion Shaft - Big Twin 33-2027

    S&S CYCLE

    $183.95
    For use with standard bearing diameter, Made in the U.S.A.
    09210168
    SKU:
    09210168
    Availability:
    Ships Same Business Day
    Weight:
    1.10 LBS
    UNITS:
    EACH
    MATERIAL:
    STEEL
    PRODUCT NAME:
    PINION SHAFT ASSEMBLY
    RIDING STYLE:
    STREET
    $183.95
    Qty in Cart: 0
    Quantity:
    Price:
    $183.95
    Subtotal:
  • S&S CYCLE Flywheel - Stroker - Twin Cam 320-0361

    S&S CYCLE Flywheel - Stroker - Twin Cam 320-0361

    S&S CYCLE

    $1,695.95
    S&S 3-piece flywheels with integral main shafts are the strongest yet, made from 4140 steel and feature a larger 1.671" crankpin, Flywheel assemblies are designed for use with Timken bearing...
    09210524
    SKU:
    09210524
    Availability:
    Ships Same Business Day
    Weight:
    39.40 LBS
    STROKE LENGTH IMPERIAL:
    4-3/8'
    ENGINE TYPE:
    'A' MOTOR
    FEATURES:
    WITHOUT SPROCKET BEARING RACE
    PRODUCT NAME:
    FLYWHEEL ASSEMBLY
    RIDING STYLE:
    STREET
    MATERIAL:
    STEEL
    UNITS:
    EACH
    $1,695.95
    Qty in Cart: 0
    Quantity:
    Price:
    $1,695.95
    Subtotal:
  • S&S CYCLE Motor Sprocket Shaft Assembly '36-'51 Big Twin 33-2001

    S&S CYCLE Motor Sprocket Shaft Assembly '36-'51 Big Twin 33-2001

    S&S CYCLE

    $183.95
    Include tapered shaft, nut and keys, For use with standard diameter bearing, Made in the U.S.A
    09210556
    SKU:
    09210556
    Availability:
    Ships Same Business Day
    Weight:
    1.15 LBS
    PRODUCT NAME:
    SPROCKET SHAFT
    RIDING STYLE:
    STREET
    UNITS:
    KIT
    $183.95
    Qty in Cart: 0
    Quantity:
    Price:
    $183.95
    Subtotal:
  • S&S CYCLE Flywheel - Stroker - Twin Cam 320-0396

    S&S CYCLE Flywheel - Stroker - Twin Cam 320-0396

    S&S CYCLE

    $1,794.95
    S&S 3-piece flywheels with integral main shafts are the strongest yet, made from 4140 steel and feature a larger 1.671" crankpin, Flywheel assemblies are designed for use with Timken bearing...
    09220120
    SKU:
    09220120
    Availability:
    Ships Same Business Day
    Weight:
    38.73 LBS
    FEATURES:
    WITH SPROCKET BEARING RACE
    MATERIAL:
    STEEL
    PRODUCT NAME:
    FLYWHEEL ASSEMBLY
    UNITS:
    EACH
    ENGINE TYPE:
    'B' MOTOR
    RIDING STYLE:
    STREET
    STROKE LENGTH IMPERIAL:
    4'
    $1,794.95
    Qty in Cart: 0
    Quantity:
    Price:
    $1,794.95
    Subtotal:
  • S&S CYCLE Flywheel - Stroker - Twin Cam 320-0352

    S&S CYCLE Flywheel - Stroker - Twin Cam 320-0352

    S&S CYCLE

    $1,695.95
    S&S 3-piece flywheels with integral main shafts are the strongest yet, made from 4140 steel and feature a larger 1.671" crankpin, Flywheel assemblies are designed for use with Timken bearing...
    09220121
    SKU:
    09220121
    Availability:
    Ships Same Business Day
    Weight:
    38.73 LBS
    PRODUCT NAME:
    FLYWHEEL ASSEMBLY
    UNITS:
    EACH
    RIDING STYLE:
    STREET
    STROKE LENGTH IMPERIAL:
    4-3/8'
    ENGINE TYPE:
    'A' MOTOR
    FEATURES:
    WITH SPROCKET BEARING RACE
    MATERIAL:
    STEEL
    $1,695.95
    Qty in Cart: 0
    Quantity:
    Price:
    $1,695.95
    Subtotal:
  • Total: items /

Adding your products to cart

S&S Cycle
 S&S Cycle stands as a towering icon in the motorcycle industry, renowned for its unwavering commitment to excellence and innovation in performance motorcycle parts. Founded in 1958 by the dynamic duo of George J. Smith and Stanley Stankos, S&S Cycle has carved its niche as the premier engineer and manufacturer of motorcycle engines and parts in America. Originating from a passion for racing, the company has spent over six decades perfecting the art of motorcycle performance, ensuring each piece that comes out of their factory not only meets but exceeds the high expectations of the powersports community. With a deep-rooted history in enhancing the power and performance of Harley-Davidson® motorcycles, S&S Cycle is the go-to brand for enthusiasts seeking unmatched quality and proven performance.

 

 S&S Cycle Parts
 S&S Cycle's product line extends far beyond just engines; it encompasses a broad array of components designed to elevate the performance of your motorcycle. From the initial solid lifter conversion kit featuring lightweight aluminum pushrods to state-of-the-art carburetors, air cleaners, and throttle bodies, every part is engineered with precision. The brand's dedication to innovation means continually refining and expanding their offerings to include everything a motorcycle might need for optimal performance and reliability.

 

 S&S Cycle Engines
 At the heart of S&S Cycle's legacy are its engines. Renowned for their robustness and reliability, S&S engines come in various styles, including the iconic Knucklehead, Shovelhead, Panhead, Evolution-style, and Twin-cam style engines. Each engine, like the T143 Assembled Long Block Engine, is meticulously constructed to provide unmatched power and torque, transforming any motorcycle into a high-performance machine. S&S's commitment to quality ensures that whether you're cruising the streets or dominating the racetrack, their engines will deliver unparalleled performance.

 

 S&S Cams
 S&S cams are designed to unlock the full potential of your motorcycle's engine. With a focus on maximizing horsepower, torque, and overall engine efficiency, S&S cams are a critical component for anyone looking to boost their bike's performance. Each cam is the result of exhaustive research and development, ensuring compatibility and impressive gains across various riding conditions. Whether you're upgrading an existing engine or building a custom setup, S&S cams are essential for achieving peak performance.

 

 S&S Motorcycle Exhausts
 To complement their engines and performance parts, S&S Cycle also offers a range of high-quality motorcycle exhaust systems. These exhausts are not only built to withstand the rigors of high-performance riding but are also designed to optimize exhaust flow, enhancing both sound and power output. From aggressive race-inspired designs to more subdued styles for daily riding, S&S Cycle's exhaust systems combine performance improvements with aesthetic appeal, making them a favorite among discerning riders.

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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