Harley Carburetor Rebuild Kits
Harley-Davidson Carburetor Rebuild Kits at JJ Motorsports
Restore crisp throttle response on your Harley with premium carburetor rebuild kits from JJ Motorsports, featuring high-quality jets, needles, gaskets, and seals for Mikuni HSR 42/45, S&S Super B, and classic CV carbs on Sportster, Big Twin, and Evo models. These complete kits make carb refresh fast and reliable.
Shop Mikuni, Drag Specialties, and S&S Cycle rebuild kits for proven performance. Explore related categories such as Harley air and fuel for jets and air cleaners, or Harley for exhaust and cams to complete your tuning and ride with perfect carburetion.
Top Harley-Davidson Carburetor Rebuild Kits
- Mikuni HSR Series 42/45 Carburetor Rebuild Kit KHS-016 – Full kit for Mikuni HSR42/45 carbs; includes all seals, jets, and needle for total refresh.
- Drag Specialties Carburetor Rebuild Kit 42 Mikuni I03102-0704 – Complete rebuild for 42mm Mikuni HSR; high-quality parts for Evo and Twin Cam Harleys.
- S&S Cycle Super B Carburetor Rebuild Kit 11-2903 – Rebuild kit for S&S Super B carb; restores performance on classic Big Twins.
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
-
On Sale
S&S CYCLE Acceleration Pump Lever 11-2376
S&S CYCLE
MSRP: $14.95Now: $13.46Was: $14.95The S&S Cycle Acceleration Pump Lever (11-2376) is essential for Harley-Davidson riders who demand crisp throttle response and smooth fuel delivery under acceleration. This precision-engineered component directly improves cold-start performance and...10031713- SKU:
- 10031713
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- ACTUATOR LEVER
- TYPE:
- PUMP
- UNITS:
- EACH
- RIDING STYLE:
- STREET
MSRP: $14.95Now: $13.46Was: $14.95Qty in Cart: 0Quantity:Price:MSRP: $14.95Now: $13.46Was: $14.95Subtotal: -
On Sale
S&S CYCLE Accelerator Pump Spring - 5 Pack 11-3501
S&S CYCLE
MSRP: $14.95Now: $13.46Was: $14.95The S&S Cycle Accelerator Pump Spring maintains consistent fuel delivery under varying throttle conditions, ensuring responsive engine performance across your riding range. A worn or weakened pump spring creates hesitation and flat spots in...10031714- SKU:
- 10031714
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MODEL:
- SUPER E
- PRODUCT NAME:
- SPRING
- TYPE:
- ACCELERATOR PUMP
- MODEL:
- SUPER G
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
MSRP: $14.95Now: $13.46Was: $14.95Qty in Cart: 0Quantity:Price:MSRP: $14.95Now: $13.46Was: $14.95Subtotal: -
On Sale
S&S CYCLE Acceleration Pump Arm 11-2377
S&S CYCLE
MSRP: $8.95Now: $8.06Was: $8.95The S&S Cycle Acceleration Pump Arm 11-2377 is essential for maintaining precise fuel delivery during hard acceleration and throttle transitions. A worn or damaged pump arm directly compromises carburetor response and engine performance, making this...10031715- SKU:
- 10031715
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- ACTUATOR ARM
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TYPE:
- PUMP
MSRP: $8.95Now: $8.06Was: $8.95 -
On Sale
S&S CYCLE Speed Idle Screw - 10-Pack 50-0150
S&S CYCLE
MSRP: $13.95Now: $12.56Was: $13.95Keeping your carburetor idle precisely calibrated is critical to engine reliability and throttle response, especially on high-performance builds where marginal tuning errors can compound into real problems. The S&S Cycle Speed Idle Screw is a direct...10031716- SKU:
- 10031716
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- UNITS:
- 10 PACK
- TYPE:
- SLOTTED
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- IDLE SCREW
MSRP: $13.95Now: $12.56Was: $13.95 -
On Sale
S&S CYCLE Acceleration Pump Adjuster Screw - 10-Pack 50-0146
S&S CYCLE
MSRP: $9.95Now: $8.96Was: $9.95Fine-tuning carburetor response separates a dialed-in engine from one that merely runs. The S&S Cycle Acceleration Pump Adjuster Screw allows precise control over fuel delivery during throttle transitions, eliminating hesitation and ensuring consistent...10031717- SKU:
- 10031717
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- FLAT HEAD SCREW
- UNITS:
- 10 PACK
- MATERIAL:
- ZINC PLATED
- RIDING STYLE:
- STREET
- TYPE:
- SLOTTED
MSRP: $9.95Now: $8.96Was: $9.95 -
On Sale
S&S CYCLE Acceleration Pump/Idle Spring - 10 Pack 11-2053
S&S CYCLE
MSRP: $12.95Now: $11.66Was: $12.95The S&S Cycle Acceleration Pump/Idle Spring is essential for maintaining precise fuel delivery and smooth throttle response in high-performance Harley-Davidson engines. These OEM-quality components ensure consistent carburetor operation under demanding...10031718- SKU:
- 10031718
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- MODEL:
- S&S
- TYPE:
- ACCELERATOR PUMP
- PRODUCT NAME:
- IDLE SPRING
MSRP: $12.95Now: $11.66Was: $12.95 -
On Sale
S&S CYCLE Acceleration Pump Plunger Nut - 10-Pack 11-2372
S&S CYCLE
MSRP: $19.95Now: $17.96Was: $19.95S&S Cycle acceleration pump plunger nuts are essential wear items for high-performance carburetors, particularly in racing and modified engine applications where fuel delivery consistency directly impacts throttle response and performance. Upgrading to...10031719- SKU:
- 10031719
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- TYPE:
- ACCELERATOR PUMP
- PRODUCT NAME:
- PLUNGER NUTS
MSRP: $19.95Now: $17.96Was: $19.95Qty in Cart: 0Quantity:Price:MSRP: $19.95Now: $17.96Was: $19.95Subtotal: -
On Sale
S&S CYCLE Acceleration Pump Plunger Spring - 10 Pack 11-2359
S&S CYCLE
MSRP: $15.95Now: $14.36Was: $15.95Carburetor performance hinges on consistent fuel atomization, and a worn acceleration pump plunger spring directly undermines throttle response and cold-start reliability. This OEM-quality replacement from S&S Cycle restores precise pump actuation,...10031720- SKU:
- 10031720
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MODEL:
- SUPER E
- MODEL:
- SUPER G
- PRODUCT NAME:
- PLUNGER SPRING
- TYPE:
- ACCELERATOR PUMP
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
MSRP: $15.95Now: $14.36Was: $15.95 -
On Sale
S&S CYCLE Float Pin Screw - 10-Pack 50-0062
S&S CYCLE
MSRP: $9.95Now: $8.96Was: $9.95Float pin screws are critical fasteners in high-performance engine builds, securing your float bowl assembly with precision and reliability. Using OEM-equivalent S&S Cycle hardware ensures proper carburetor function and prevents fuel delivery issues that...10031721- SKU:
- 10031721
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- SLOTTED
- UNITS:
- 10 PACK
- PRODUCT NAME:
- SCREW
- RIDING STYLE:
- STREET
MSRP: $9.95Now: $8.96Was: $9.95Qty in Cart: 0Quantity:Price:MSRP: $9.95Now: $8.96Was: $9.95Subtotal: -
On Sale
S&S CYCLE Bowl Vent Plug - 10-Pack 50-0105
S&S CYCLE
MSRP: $6.95Now: $6.26Was: $6.95Carburetor bowl vent plugs are critical for maintaining proper fuel system integrity and preventing fuel leakage during storage, transportation, or high-performance riding. A damaged or missing vent plug compromises your fuel system's ability to regulate...10031722- SKU:
- 10031722
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- ZINC PLATED
- RIDING STYLE:
- STREET
- TYPE:
- SWIVEL HEAD
- UNITS:
- 10 PACK
- PRODUCT NAME:
- SCREW
MSRP: $6.95Now: $6.26Was: $6.95 -
On Sale
S&S CYCLE Main Super E/Super G Carburetor Tube 11-2085
S&S CYCLE
MSRP: $17.95Now: $16.16Was: $17.95The S&S Cycle Main Super E/Super G Carburetor Tube (11-2085) is essential for optimizing fuel delivery and air-fuel mixture consistency in high-performance applications. This OEM-quality component ensures reliable carburetor operation under demanding...10031723- SKU:
- 10031723
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- EACH
- TYPE:
- MAIN DISCHARGE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- TUBE
MSRP: $17.95Now: $16.16Was: $17.95 -
On Sale
S&S CYCLE Super E/G Carburetor Float Pin - 5-Pack 11-2370
S&S CYCLE
MSRP: $12.95Now: $11.66Was: $12.95Carburetor float pins are critical wear items that directly impact fuel delivery precision and engine idle quality. A worn or damaged float pin compromises needle seat performance, leading to fuel starvation, overflow, and inconsistent jetting across...10031724- SKU:
- 10031724
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MODEL:
- SUPER E
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- FLOAT PIN
- UNITS:
- 5 PACK
- MODEL:
- SUPER G
MSRP: $12.95Now: $11.66Was: $12.95 -
On Sale
S&S CYCLE Acceleration Pump Cap Screw - 10-Pack 50-0098
S&S CYCLE
MSRP: $10.95Now: $9.86Was: $10.95If you're rebuilding or maintaining S&S Cycle carburetors, having quality OEM replacement fasteners on hand is essential—worn or stripped acceleration pump cap screws can compromise fuel atomization and throttle response. This 10-pack ensures you have...10031729- SKU:
- 10031729
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- ROUND HEAD SCREW
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- MATERIAL:
- ZINC PLATED
- TYPE:
- SLOTTED
MSRP: $10.95Now: $9.86Was: $10.95 -
On Sale
S&S CYCLE Screw - 3/8-16X1" 50-0161
S&S CYCLE
MSRP: $4.95Now: $4.46Was: $4.95When you're building or maintaining high-performance engines, fastener quality directly impacts reliability and longevity. This S&S Cycle socket head cap screw is engineered to exacting tolerances, ensuring secure fastening on critical engine components...10031730- SKU:
- 10031730
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- SCREW
- THREAD LENGTH IMPERIAL:
- 1.00'
- TYPE:
- CARBURETOR
- THREAD DIAMETER IMPERIAL:
- 0.38'
- THREAD PITCH IMPERIAL:
- 0.63'
- UNITS:
- EACH
- RIDING STYLE:
- STREET
MSRP: $4.95Now: $4.46Was: $4.95 -
On Sale
S&S CYCLE Screw - 3/8-16X1.25" 50-0162
S&S CYCLE
MSRP: $6.95Now: $6.26Was: $6.95When you're building or maintaining high-performance engines, fastener quality directly impacts reliability and longevity. S&S Cycle's precision-machined socket head cap screws are engineered to OEM specifications, ensuring proper clamping force and...10031731- SKU:
- 10031731
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- SCREW
- RIDING STYLE:
- STREET
- THREAD DIAMETER IMPERIAL:
- 0.38'
- TYPE:
- CARBURETOR
- THREAD LENGTH IMPERIAL:
- 1.25'
- THREAD PITCH IMPERIAL:
- 0.63'
- UNITS:
- EACH
MSRP: $6.95Now: $6.26Was: $6.95 -
On Sale
S&S CYCLE Screw - 3/8-16X1.37" 50-0163
S&S CYCLE
MSRP: $8.95Now: $8.06Was: $8.95When you're building or maintaining high-performance engines, fastener quality directly impacts reliability and longevity. This S&S Cycle socket head cap screw is engineered to OEM specifications, ensuring proper clamping force and vibration resistance...10031732- SKU:
- 10031732
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- SCREW
- TYPE:
- CARBURETOR
- THREAD DIAMETER IMPERIAL:
- 0.38'
- RIDING STYLE:
- STREET
- THREAD LENGTH IMPERIAL:
- 1.37'
- THREAD PITCH IMPERIAL:
- 0.63'
- UNITS:
- EACH
MSRP: $8.95Now: $8.06Was: $8.95 -
On Sale
S&S CYCLE Screw - 3/8-16X2" 50-0164
S&S CYCLE
MSRP: $7.95Now: $7.16Was: $7.95S&S Cycle fasteners are engineered to meet the exacting tolerances required in high-performance engine builds and drivetrain assemblies. This socket head cap screw delivers the clamping force and reliability you need in critical applications where...10031733- SKU:
- 10031733
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- SCREW
- RIDING STYLE:
- STREET
- THREAD LENGTH IMPERIAL:
- 2.00'
- THREAD DIAMETER IMPERIAL:
- 0.38'
- TYPE:
- CARBURETOR
- THREAD PITCH IMPERIAL:
- 0.63'
- UNITS:
- EACH
MSRP: $7.95Now: $7.16Was: $7.95 -
On Sale
S&S CYCLE Tube Fast Idle 0381F
S&S CYCLE
MSRP: $10.95Now: $9.86Was: $10.95The S&S Cycle Tube Fast Idle keeps your engine running at the precise RPM needed for smooth cold starts and efficient warm-up cycles. This OEM-replacement component ensures consistent idle quality across varying ambient temperatures, eliminating the...10031734- SKU:
- 10031734
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- PRODUCT NAME:
- TUBE
- RIDING STYLE:
- STREET
- TYPE:
- FAST IDLE
- UNITS:
- EACH
MSRP: $10.95Now: $9.86Was: $10.95 -
On Sale
S&S CYCLE O-Ring - 5x3x1mm - 10-Pack 500-0148
S&S CYCLE
MSRP: $12.95Now: $11.66Was: $12.95O-rings are critical sealing components that prevent fluid leakage in high-pressure applications—whether you're rebuilding carburetors, fuel systems, or engine components. Using OEM-spec replacement o-rings ensures proper fit and durability, eliminating...10031735- SKU:
- 10031735
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- O-RING
- UNITS:
- 10 PACK
MSRP: $12.95Now: $11.66Was: $12.95 -
On Sale
S&S CYCLE Fitting Hose - .04" 16-0134
S&S CYCLE
MSRP: $8.95Now: $8.06Was: $8.95Precision fuel and fluid delivery is non-negotiable in high-performance applications, and proper hose sizing is critical to maintaining system integrity under load. The S&S Cycle Fitting Hose (.04" ID) provides the exact dimensional accuracy needed for...10031736- SKU:
- 10031736
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- HOSE
- TYPE:
- CARBURETOR
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $8.95Now: $8.06Was: $8.95
Buying Guide and FAQs
Buying Guide: Factors to Consider When Choosing Harley Bike Carburetor Rebuild Kits
- Compatibility: Ensure the kit fits your Harley's carburetor type (e.g., S&S Super E/G, Keihin CV, Mikuni HSR42/45/48, HS40) and model (e.g., Big Twin 1970-2006, XL 1973-1985, Twin Cam 1999-2006). Use the vehicle selector for year-specific matches to avoid incomplete repairs or performance issues.
- Type of Use: For vintage or stock rebuilds, opt for basic kits with gaskets and jets; performance or modified engines benefit from comprehensive sets including diaphragms, needles, and O-rings for smooth throttle response in street or touring conditions.
- Components and Upgrades: Select kits with gaskets, diaphragms, needles, jets, O-rings, springs, and seals; upgrade to ethanol-resistant materials or brass jets for durability against modern fuels.
- Brand and Quality: Choose S&S Cycle for Super E/G kits, K&L Supply for Keihin CV rebuilds, or Mikuni for HSR/HS40 options. Prioritize high-quality, OEM-matching components for reliable sealing and long-term performance.
- Installation and Cost: Kits are designed for DIY carb overhauls with basic tools; prices range from $24.95 for basic sets to $102.95 for premium options—factor in expert support for fitment and free shipping over $99 for value.
Frequently Asked Questions (FAQs)
- What Harley models and carburetors do these rebuild kits support? Kits support models like Big Twin (1970-2006), XL (1973-1985), Twin Cam (1999-2006), with compatibility for S&S Super E/G, Keihin CV, Mikuni HSR42/45/48, and HS40—use the year/make/model filter for exact matches.
- How do rebuild kits restore carburetor performance? They include components to replace worn seals, jets, and diaphragms, ensuring smooth operation, preventing leaks, and improving throttle response for stock or modified engines.
- What is typically included in a kit? Most kits contain gaskets, diaphragms, needles, jets, O-rings, springs, and seals; check details for specific inclusions like accelerator pump or idle mixture screws.
- Are these kits suitable for ethanol fuels? Yes, many feature ethanol-resistant materials to withstand modern E10 blends without degradation.
- What if a kit doesn't fit my Harley? Verify carb type and model before buying. Our returns policy allows exchanges or refunds if it doesn't match.
- Can I find related air and fuel parts? Yes—explore air cleaners, fuel filters, or full carbs in the Harley air and fuel category to complement your rebuild for optimal engine efficiency.
