Alternator
Harley Bike Alternators & Regulators at JJ Motorsports
Keep your Harley charged and running strong with premium regulators and rectifying regulators from JJ Motorsports, engineered for reliable voltage control and maximum charging output on Sportster XL, FL/FLH Touring, and Big Twin models. These high-quality units prevent overcharging and ensure steady power for lights, ignition, and accessories.
Shop Cycle Electric and Drag Specialties regulators for proven durability. Explore related categories such as Harley lights and electrical for stators and batteries, or Harley for wiring and switches to complete your charging system upgrade.
Top Harley Alternators & Regulators
- Cycle Electric Inc Rectifying Regulator Harley-Davidson CE-324 – High-output rectifying regulator; built-in rectifier for Big Twin and Sportster charging systems.
- Drag Specialties Regulator XL 92-93 Chrome 74523-92CHR – Chrome voltage regulator for 1992-1993 Sportster; direct OEM replacement with classic look.
- Drag Specialties Voltage Regulator FL/FLH MC-DRAG009 – Solid-state regulator for FL/FLH Touring; reliable charging for 1989-1999 models.
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
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COMPU-FIRE Voltage Regulator 38A - Harley Davidson 55150
COMPU-FIRE
$295.85A weak or failing voltage regulator doesn't just dim your lights—it strains your stator, robs you of engine efficiency, and leaves you stranded on the road. The COMPU-FIRE 38A Voltage Regulator is engineered to eliminate that load when your bike isn't...09131703- SKU:
- 09131703
- Availability:
- Ships Same Business Day
- Weight:
- 1.34 LBS
- AMPS:
- 38 A
- PRODUCT NAME:
- REGULATOR
- BATTERY VOLTAGE:
- 12 V
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK
- TYPE:
- SERIES-TYPE
$295.85 -
COMPU-FIRE 32A Charging System Kit - Harley Davidson 55520
COMPU-FIRE
$449.20A reliable charging system is the foundation of any hardworking Harley engine—without it, you're stranded. The COMPU-FIRE 32A kit delivers a complete stator, rotor, and regulator solution that restores charging capacity and reduces parasitic drag on your...DS195201- SKU:
- DS195201
- Availability:
- Ships Same Business Day
- Weight:
- 8.15 LBS
- AMPS:
- 32 A
- UNITS:
- KIT
- BATTERY VOLTAGE:
- 12 V
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- CHARGING SYSTEM
$449.20Qty in Cart: 0Quantity:Price:$449.20Subtotal: -
COMPU-FIRE Charging - System - 40A 55560
COMPU-FIRE
$635.33Provide 25A at idle and 40A continuously above 2800 rpm, Unique narrow rotor and stator fit into Softail/Dyna/FLT primary cases as used by most custom builders and the voltage regulator bolts on the stock location without any frame modifications,...21120097- SKU:
- 21120097
- Availability:
- Ships Same Business Day
- Weight:
- 9.81 LBS
- AMPS:
- 40 A
- BATTERY VOLTAGE:
- 12 V
- PRODUCT NAME:
- CHARGING SYSTEM
- ALTERNATOR PHASE TYPE:
- THREE-PHASE
- UNITS:
- EACH
- RIDING STYLE:
- STREET
$635.33 -
COMPU-FIRE Charging - System - 40A 55576
COMPU-FIRE
$660.61If you're running a fuel-injected Softail, Dyna, or FLT with modern electrical demands, the stock charging system likely can't keep up—especially at idle or during low-RPM cruising. The COMPU-FIRE 40A Charging System delivers reliable output when you...21120152- SKU:
- 21120152
- Availability:
- Ships Same Business Day
- Weight:
- 10.75 LBS
- ALTERNATOR PHASE TYPE:
- THREE-PHASE
- AMPS:
- 40 A
- BATTERY VOLTAGE:
- 12 V
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- CHARGING SYSTEM
$660.61 -
COMPU-FIRE Charging - System - 40A 55566
COMPU-FIRE
$674.63If you're running a fuel-injected engine or overdrive transmission on your Harley, your charging system needs to keep pace with increased electrical demands—and a stock alternator simply won't cut it. The COMPU-FIRE 40A Charging System delivers...21120153- SKU:
- 21120153
- Availability:
- Ships Same Business Day
- Weight:
- 10.55 LBS
- BATTERY VOLTAGE:
- 12 V
- AMPS:
- 40 A
- PRODUCT NAME:
- CHARGING SYSTEM
- ALTERNATOR PHASE TYPE:
- THREE-PHASE
- UNITS:
- EACH
- RIDING STYLE:
- STREET
$674.63 -
DRAG SPECIALTIES Regulator - FX/FLST '07 - Black 74540-07BLK
DRAG SPECIALTIES
$166.87A faulty regulator compromises your electrical system's ability to maintain consistent voltage, leading to dimming lights, weak starting, and potential damage to your battery and alternator. This Drag Specialties regulator delivers the reliability that...21121026- SKU:
- 21121026
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- BATTERY VOLTAGE:
- 12 V
- COLOR/FINISH:
- BLACK
- UNITS:
- EACH
- AMPS:
- 40 A
- PRODUCT NAME:
- REGULATOR
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
$166.87 -
DRAG SPECIALTIES Regulator - FX/FLST '08-'10 - Black 74540-08BLK
DRAG SPECIALTIES
$209.67A weak or failing regulator can leave you stranded with a dead battery or inconsistent charging, especially during high-demand riding or racing conditions. This DRAG SPECIALTIES regulator delivers the thermal stability and electrical reliability your...21121028- SKU:
- 21121028
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- UNITS:
- EACH
- BATTERY VOLTAGE:
- 12 V
- COLOR/FINISH:
- BLACK
- AMPS:
- 40 A
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- REGULATOR
- RIDING STYLE:
- STREET
$209.67 -
DRAG SPECIALTIES Regulator - FXS '11-'17 - Black 74540-11BLK
DRAG SPECIALTIES
$209.67A voltage regulator is critical to maintaining stable charging output across your electrical system—especially under the demands of high-performance riding or extended use. The Drag Specialties regulator for FXS models ('11-'17) delivers reliable,...21121030- SKU:
- 21121030
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- PRODUCT NAME:
- REGULATOR
- AMPS:
- 45 A
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- AMPS:
- 60 A
- BATTERY VOLTAGE:
- 12 V
- COLOR/FINISH:
- BLACK
$209.67 -
DRAG SPECIALTIES Regulator - FL '99-'01 - Black 74505-97BLK
DRAG SPECIALTIES
$209.67A faulty regulator compromises your charging system's stability, leaving you stranded or facing electrical gremlins that are notoriously difficult to diagnose. DRAG Specialties engineered this regulator through two years of rigorous development to...21121032- SKU:
- 21121032
- Availability:
- Ships Same Business Day
- Weight:
- 2.35 LBS
- UNITS:
- EACH
- AMPS:
- 38 A
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- REGULATOR
- RIDING STYLE:
- STREET
- BATTERY VOLTAGE:
- 12 V
- COLOR/FINISH:
- BLACK
$209.67Qty in Cart: 0Quantity:Price:$209.67Subtotal: -
DRAG SPECIALTIES Regulator - FL '99-'01 - Chrome 74505-97CHR
DRAG SPECIALTIES
$216.09A voltage regulator is critical to maintaining stable electrical output across your bike's charging system—undersized or poorly engineered units cause battery drain, dim lighting, and premature component failure. This Drag Specialties regulator was...21121033- SKU:
- 21121033
- Availability:
- Ships Same Business Day
- Weight:
- 2.35 LBS
- COLOR/FINISH:
- CHROME
- BATTERY VOLTAGE:
- 12 V
- UNITS:
- EACH
- AMPS:
- 38 A
- PRODUCT NAME:
- REGULATOR
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
$216.09Qty in Cart: 0Quantity:Price:$216.09Subtotal: -
DRAG SPECIALTIES Regulator - FL '02-'03 - Black 74505-02BLK
DRAG SPECIALTIES
$209.67A failed voltage regulator leaves you stranded—or worse, damages your charging system beyond repair. This DRAG Specialties regulator delivers the thermal stability and electrical precision your FL needs, backed by rigorous domestic assembly and testing...21121034- SKU:
- 21121034
- Availability:
- Ships Same Business Day
- Weight:
- 2.30 LBS
- AMPS:
- 38 A
- AMPS:
- 45 A
- BATTERY VOLTAGE:
- 12 V
- PRODUCT NAME:
- REGULATOR
- COLOR/FINISH:
- BLACK
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
$209.67Qty in Cart: 0Quantity:Price:$209.67Subtotal: -
DRAG SPECIALTIES Regulator - FL '02-'03 - Chrome 74622-02CHR
DRAG SPECIALTIES
$216.09A voltage regulator is the unsung guardian of your electrical system—it keeps your battery charging at the correct rate, preventing overcharge damage and ensuring consistent power delivery to ignition, fuel systems, and accessories. The DRAG Specialties...21121035- SKU:
- 21121035
- Availability:
- Ships Same Business Day
- Weight:
- 2.30 LBS
- AMPS:
- 38 A
- AMPS:
- 45 A
- BATTERY VOLTAGE:
- 12 V
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
- PRODUCT NAME:
- REGULATOR
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
$216.09Qty in Cart: 0Quantity:Price:$216.09Subtotal: -
DRAG SPECIALTIES Regulator - FL '04-'05 - Black 74505-04BLK
DRAG SPECIALTIES
$209.67A regulator that fails mid-race costs you consistency and reliability when it matters most. DRAG SPECIALTIES engineered this regulator through two years of dedicated development and rigorous testing to deliver stable voltage output and superior heat...21121036- SKU:
- 21121036
- Availability:
- Ships Same Business Day
- Weight:
- 2.20 LBS
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- REGULATOR
- AMPS:
- 45 A
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- AMPS:
- 38 A
- BATTERY VOLTAGE:
- 12 V
- COLOR/FINISH:
- BLACK
$209.67 -
DRAG SPECIALTIES Regulator - FL '04-'05 - Chrome 74622-04CHR
DRAG SPECIALTIES
$216.09A quality voltage regulator is critical to maintaining stable charging output and protecting your electrical system from voltage spikes that can damage components or drain your battery prematurely. This DRAG Specialties regulator delivers the reliability...21121037- SKU:
- 21121037
- Availability:
- Ships Same Business Day
- Weight:
- 2.15 LBS
- PRODUCT NAME:
- REGULATOR
- UNITS:
- EACH
- AMPS:
- 45 A
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- AMPS:
- 38 A
- BATTERY VOLTAGE:
- 12 V
$216.09 -
DRAG SPECIALTIES Regulator - FL '06-'08 - Black 74505-06BLK
DRAG SPECIALTIES
$209.67A failing regulator on your Harley-Davidson is a direct path to electrical gremlins—dim lights, weak charging, and unpredictable performance. Drag Specialties engineered this regulator through two years of rigorous development and real-world testing to...21121038- SKU:
- 21121038
- Availability:
- Ships Same Business Day
- Weight:
- 2.10 LBS
- PRODUCT NAME:
- REGULATOR
- UNITS:
- EACH
- AMPS:
- 45 A
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- AMPS:
- 60 A
- BATTERY VOLTAGE:
- 12 V
- COLOR/FINISH:
- BLACK
$209.67 -
DRAG SPECIALTIES Regulator - FL '06-'08 - Chrome 74622-06CHR
DRAG SPECIALTIES
$216.09A voltage regulator is critical to maintaining electrical system stability on your FL—undersized or failing units cause charging inconsistencies, battery drain, and potential damage to aftermarket electronics. This DRAG Specialties regulator delivers the...21121039- SKU:
- 21121039
- Availability:
- Ships Same Business Day
- Weight:
- 2.05 LBS
- AMPS:
- 45 A
- UNITS:
- EACH
- AMPS:
- 60 A
- BATTERY VOLTAGE:
- 12 V
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- REGULATOR
- RIDING STYLE:
- STREET
$216.09 -
DRAG SPECIALTIES Regulator - FXD '04-'05 - Black 74631-04BLK
DRAG SPECIALTIES
$181.85A failing regulator doesn't just drain your battery—it compromises charging system stability and can strand you mid-ride. This Drag Specialties unit delivers rock-solid voltage regulation with domestic engineering and rigorous quality control, giving you...21121040- SKU:
- 21121040
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- AMPS:
- 40 A
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- REGULATOR
- RIDING STYLE:
- STREET
- BATTERY VOLTAGE:
- 12 V
- COLOR/FINISH:
- BLACK
- UNITS:
- EACH
$181.85 -
DRAG SPECIALTIES Regulator - FXD '06-'07 - Chrome 74561-06CHR
DRAG SPECIALTIES
$183.99A voltage regulator is critical to maintaining stable electrical output on your FXD—without it, you risk battery drain, dim lighting, and unreliable charging at idle. This Drag Specialties unit delivers the thermal management and reliability you need for...21121043- SKU:
- 21121043
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
- UNITS:
- EACH
- AMPS:
- 40 A
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- REGULATOR
- RIDING STYLE:
- STREET
- BATTERY VOLTAGE:
- 12 V
$183.99 -
DRAG SPECIALTIES Regulator - FXD '08-'17 - Chrome 74561-08CHR
DRAG SPECIALTIES
$176.50A voltage regulator is critical to maintaining stable electrical output across your charging system—inconsistent voltage leads to premature battery failure, dim lighting, and unreliable ignition. This DRAG SPECIALTIES regulator combines American...21121045- SKU:
- 21121045
- Availability:
- Ships Same Business Day
- Weight:
- 1.71 LBS
- COLOR/FINISH:
- CHROME
- AMPS:
- 40 A
- PRODUCT NAME:
- REGULATOR
- BATTERY VOLTAGE:
- 12 V
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
$176.50 -
DRAG SPECIALTIES Regulator - FXD '99-'03 - Chrome 74518-99ACHR
DRAG SPECIALTIES
$149.75A reliable voltage regulator is the foundation of any stable electrical system, and this DRAG SPECIALTIES unit delivers the thermal management and precision your FXD needs to keep power flowing consistently whether you're cruising or pushing hard. Two...21121051- SKU:
- 21121051
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- RIDING STYLE:
- STREET
- BATTERY VOLTAGE:
- 12 V
- AMPS:
- 32 A
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- REGULATOR
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
$149.75
