Harley Fuel Injection Tuning Systems
Harley-Davidson Fuel Injection Tuning Systems at JJ Motorsports
Optimize your Harley's EFI performance with premium tuning systems from JJ Motorsports, featuring advanced ECU controllers and auto-tune modules for precise fuel mapping, throttle-by-wire integration, and dyno-level gains on Twin Cam, Milwaukee-Eight Softail, and Touring models. These plug-and-play kits deliver smoother power delivery, better throttle response, and self-learning calibration without dyno visits.
Shop Daytona Twin Tec and ThunderMax EFI tuning systems for race-proven reliability. Explore related categories such as Harley air and fuel for air cleaners and jets, or Harley for exhaust and cams to complete your EFI upgrade and unleash V-Twin potential.
Top Harley-Davidson Fuel Injection Tuning Systems
- Daytona Twin Tec LLC Fuel Injector Generation 6 Controller Twin Cam 17700 – Gen 6 EFI controller for Twin Cam engines; USB tuning with closed-loop O2 feedback for custom mapping.
- ThunderMax ECM with Auto-Tune 14-16 FLT 309-562 – Plug-and-play ECM for 2014-2016 Touring; self-tuning with touchscreen interface for throttle-by-wire models.
- ThunderMax ECU with Auto-Tune 18 Softail 309-589 – Auto-tuning ECU for 2018 Softail; seamless integration with Milwaukee-Eight for instant gains.
- ThunderMax ECM with Auto-Tune Non Throttle by Wire 309-460 – ECM for non-TBW Harleys; automatic fuel tuning for cleaner running and more torque.
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!
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DYNOJET Power Commander 6 with Ignition Adjustment - V-Rod PC6-15006
DYNOJET
$533.32The Power Commander 6 gives you cylinder-by-cylinder control over fuel and ignition timing, transforming a stock V-Rod's air/fuel ratio and spark advance into a precision-tuned powerplant. Whether you're running a bolt-on intake, exhaust, or built motor,...10203575- SKU:
- 10203575
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
$533.32 -
DYNOJET Power Commander 6 with Ignition Adjustment - Sportster PC6-15009
DYNOJET
$513.32Stock Sportster fueling and ignition curves leave performance on the table—especially when running modified engines or aftermarket intake and exhaust systems. The DynoJet Power Commander 6 delivers cylinder-by-cylinder tuning control and ignition...10203577- SKU:
- 10203577
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
$513.32 -
DYNOJET Power Commander 6 with Ignition Adjustment - Sportster PC6-15010
DYNOJET
$533.32The stock ECU on your Sportster leaves performance on the table—the Power Commander 6 reclaims it through precise fuel and ignition mapping tailored to your engine's actual operating conditions. Whether you've added bolt-on modifications or are running a...10203578- SKU:
- 10203578
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
$533.32 -
DYNOJET Power Commander 6 with Ignition Adjustment - Touring PC6-15011
DYNOJET
$533.32The DynoJet Power Commander 6 gives you precise control over fuel and ignition timing on a cylinder-by-cylinder basis, letting you extract maximum performance from your motorcycle without guesswork or expensive trial-and-error tuning. Whether you're...10203579- SKU:
- 10203579
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
$533.32 -
DYNOJET Power Commander 6 with Ignition Adjustment - Street PC6-15014
DYNOJET
$465.54Stock fuel and ignition maps leave performance on the table—the Power Commander 6 with Ignition Adjustment unlocks that potential through precise cylinder-by-cylinder tuning. Whether you're running forced induction, naturally aspirated, or a heavily...10203581- SKU:
- 10203581
- Availability:
- Ships Same Business Day
- Weight:
- 0.82 LBS
$465.54 -
DYNOJET Power Commander 6 with Ignition Adjustment - Sportster PC6-15017
DYNOJET
$533.32Factory fuel and ignition maps are one-size-fits-all compromises that leave performance on the table. The Power Commander 6 lets you dial in precise fuel and timing adjustments across the entire RPM range, unlocking measurable gains in horsepower and...10203583- SKU:
- 10203583
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
$533.32 -
DYNOJET Power Commander 6 with Ignition Adjustment - Sportster PC6-15018
DYNOJET
$533.32Stock fuel and ignition mapping leaves performance on the table—the Power Commander 6 unlocks your Sportster's true potential through cylinder-by-cylinder and gear-specific tuning. This plug-and-play ECU controller gives you precise control over fueling...10203584- SKU:
- 10203584
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
$533.32 -
DYNOJET Power Commander 6 with Ignition Adjustment - Touring PC6-15019
DYNOJET
$533.32Stock ECU tuning limits your engine's potential and leaves power on the table across the rev range. The DynoJet Power Commander 6 gives you cylinder-by-cylinder, gear-by-gear fuel and ignition control—letting you extract every bit of performance your...10203585- SKU:
- 10203585
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
$533.32 -
DYNOJET Power Commander 6 with Ignition Adjustment - Softail PC6-15021
DYNOJET
$533.32If you're running a Softail and want to extract real performance gains from your engine, fuel mapping and ignition timing control are non-negotiable. The DynoJet Power Commander 6 gives you cylinder-by-cylinder, gear-by-gear tuning authority—transforming...10203586- SKU:
- 10203586
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
$533.32 -
DYNOJET Power Commander 6 with Ignition Adjustment - Dyna PC6-15022
DYNOJET
$533.32Stock engine mapping leaves performance on the table and limits your ability to optimize for different riding conditions, fuel grades, and modifications. The Power Commander 6 with Ignition Adjustment puts precise fuel and ignition control directly in...10203587- SKU:
- 10203587
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
$533.32 -
DYNOJET Power Commander 6 with Ignition Adjustment - V-Rod PC6-15023
DYNOJET
$533.32The Power Commander 6 gives you granular control over fuel and ignition timing on your V-Rod—critical when you're extracting real horsepower from a modified engine. Factory ECU maps are one-size-fits-all; this tuner lets you optimize for your specific...10203588- SKU:
- 10203588
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
$533.32 -
DYNOJET Power Commander 6 with Ignition Adjustment - Softail PC6-15024
DYNOJET
$533.32Stock EFI mapping leaves power on the table—the Power Commander 6 unlocks that potential through cylinder-by-cylinder, gear-specific tuning that responds to real-world conditions. Whether you're running bolt-on bolt-ons or forced induction, this tuner...10203589- SKU:
- 10203589
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
$533.32 -
DYNOJET Power Commander 6 with Ignition Adjustment - Dyna PC6-15025
DYNOJET
$533.32Precision fuel and ignition tuning separates competitive riders from the rest. The Power Commander 6 delivers individual cylinder mapping and real-time adjustments without requiring extensive fabrication or dyno time, giving you the ability to extract...10203590- SKU:
- 10203590
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
$533.32 -
DYNOJET Power Commander 6 with Ignition Adjustment - V-Rod PC6-15026
DYNOJET
$533.32The DynoJet Power Commander 6 gives you cylinder-by-cylinder fuel and ignition control without factory ECU limitations—critical for extracting maximum horsepower and torque from your V-Rod platform. Whether you're running bolt-on modifications or a...10203591- SKU:
- 10203591
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
$533.32 -
DYNOJET Power Commander 6 with Ignition Adjustment - Touring PC6-15027
DYNOJET
$533.32The stock ECU limits your motorcycle's performance potential—the Power Commander 6 puts that control back in your hands. With cylinder-by-cylinder and gear-specific mapping, you can extract measurable gains in power and throttle response while optimizing...10203592- SKU:
- 10203592
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
$533.32 -
DYNOJET Power Commander 6 with Ignition Adjustment - Touring PC6-15028
DYNOJET
$533.32The Power Commander 6 with Ignition Adjustment puts precise fuel and timing control directly in your hands—critical when you're upgrading components or chasing peak performance on the dyno. This plug-and-play tuner eliminates generic factory maps,...10203593- SKU:
- 10203593
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
$533.32 -
DYNOJET Power Commander 6 with Ignition Adjustment - Softail PC6-15039
DYNOJET
$533.32The Power Commander 6 puts precise fuel and ignition control directly in your hands, letting you extract maximum performance from your Softail without sacrificing reliability or aesthetics. Whether you're compensating for intake and exhaust modifications...10203594- SKU:
- 10203594
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
$533.32 -
DYNOJET Power Commander 6 with Ignition Adjustment - Touring PC6-15040
DYNOJET
$588.88The Power Commander 6 gives you cylinder-by-cylinder, gear-by-gear fuel and ignition control—something your bike's stock ECU simply cannot deliver. Whether you're running bolt-on upgrades or forced induction, this tuning platform lets you extract maximum...10203595- SKU:
- 10203595
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
$588.88 -
DYNOJET Power Commander 6 with Ignition Adjustment - Dyna PC6-15041
DYNOJET
$533.32Stock fuel and ignition maps leave performance on the table—the Power Commander 6 lets you reclaim it through precise, cylinder-by-cylinder tuning. Whether you're running a custom air intake, exhaust system, or forced induction setup, this unit adapts...10203596- SKU:
- 10203596
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
$533.32 -
DYNOJET Power Commander 6 with Ignition Adjustment - Touring/Trike PC6-15049
DYNOJET
$588.88Stock fuel mapping leaves performance on the table—the Power Commander 6 with Ignition Adjustment lets you reclaim it through precise cylinder-by-cylinder tuning tailored to your touring bike or trike. Whether you're running a slip-on exhaust, air...10203599- SKU:
- 10203599
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
$588.88
Buying Guide and FAQs
Buying Guide: Factors to Consider When Choosing Harley Bike Fuel Injection Tuning Systems
- Compatibility: Ensure the tuner fits your Harley's model (e.g., Twin Cam, V-Rod 2002-2013, Touring FLHT 2014-2016, Softail 2016-2017) and engine type (e.g., fuel-injected, throttle-by-wire or non-TBW). Use the vehicle selector for year-specific matches to avoid wiring or calibration issues.
- Type of Use: For street touring or modified bikes, select auto-tune ECMs for self-calibrating efficiency; high-performance or dyno-tuned setups benefit from wideband controllers with data logging for precise air/fuel adjustments in demanding conditions.
- Components and Upgrades: Choose systems with ECU controllers, auto-tune modules, wide-band O2 sensors (e.g., Bosch LSU 4.2), harnesses, and USB interfaces. Add upgrades like target tune kits for adaptive control or shop tuners for multi-bike use.
- Brand and Quality: Opt for ThunderMax for ECMs with touchscreen auto-tune, Dynojet for Power Vision wideband systems with datalogging, or Daytona Twin Tec for Gen 6 controllers with O2 feedback. Prioritize dyno-proven, plug-and-play designs for reliability and performance gains.
- Installation and Cost: Most are plug-in with OEM connectors for easy DIY setup; include software and manuals. Prices range from $595 for basic tuners to $1,285 for advanced controllers—factor in free software updates and free shipping over $99 for value.
Frequently Asked Questions (FAQs)
- What Harley models do these fuel injection tuning systems support? Systems support models like Twin Cam, V-Rod (2002-2013), Touring FLHT (2008-2016), Softail (2016-2017), and more—use the year/make/model filter for exact compatibility with throttle-by-wire or non-TBW setups.
- How do auto-tune systems improve performance? They self-calibrate air/fuel ratios using wide-band O2 sensors for smoother power, better throttle response, and no dyno required, ideal for modified engines.
- What is typically included in a tuning kit? Kits often include ECU/modules, wide-band sensors, harnesses, USB cables, software, weld nuts, and manuals for complete installation and tuning.
- Are these systems plug-and-play? Yes, with OEM-style connectors and closed-loop feedback, they install easily without ECU removal, supporting custom maps via PC.
- What if a system doesn't fit my Harley? Verify engine type, year, and throttle system 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 pumps, or carbs in the Harley air and fuel category to complement your tuning system for optimal efficiency.
