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!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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TECHNORESEARCH TRO2 Sensor System TRO2-002-001
TECHNORESEARCH
$532.95Accurate air-fuel ratio data is non-negotiable when tuning forced induction systems or dialing in engine modifications. The TECHNORESEARCH TRO2 Sensor System gives you real-time O² feedback that integrates seamlessly with industry-standard tuning...38070343- SKU:
- 38070343
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
- BASE COLOR:
- BLACK
- PHYSICAL CONNECTION:
- PLUG-IN (OEM STYLE CONNECTORS)
- BASE COLOR:
- ORANGE
- MODEL:
- TRO2
- RIDING STYLE:
- STREET
- FEATURE:
- INCLUDES TWO OXYGEN SENSORS
- PROGRAMMING:
- PRE-PROGRAMMED
- TYPE:
- AIR/FUEL RATIO
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- ORANGE
- OXYGEN SENSOR BAND:
- WIDE-BAND
- PRODUCT NAME:
- TUNING MODULE
$532.95Qty in Cart: 0Quantity:Price:$532.95Subtotal: -
NAMZ Fuel Injector Enrichener - '07-'10 Big Twin Race NR-XIED
NAMZ
$132.95When you're running high-flow intake and exhaust systems, your fuel mixture needs to adapt—or risk heat buildup that'll compromise engine reliability and performance. The NAMZ Fuel Injector Enrichener automatically adjusts your fuel delivery by...10201151- SKU:
- 10201151
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- COLOR/FINISH:
- BLACK
- UNITS:
- PAIR
- BASE COLOR:
- BLACK
- PHYSICAL CONNECTION:
- PLUG-IN (OEM STYLE CONNECTORS)
- PRODUCT NAME:
- OXYGEN SENSOR CONTROLLER
- PROGRAMMING:
- PRE-PROGRAMMED
- RIDING STYLE:
- STREET
$132.95Qty in Cart: 0Quantity:Price:$132.95Subtotal: -
THUNDERMAX USB Pigtail 309-424
THUNDERMAX
$20.95If you're running a ThunderMax ECM on a Dyna, Softail Rocker, or early V-Rod with limited space around the engine control module, the THUNDERMAX USB Pigtail 309-424 solves a real installation challenge. This harness adapter lets you connect a second...10201855- SKU:
- 10201855
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- COLOR/FINISH:
- BLACK
- PHYSICAL CONNECTION:
- SPLICE-IN
- TYPE:
- REPLACEMENT COMPONENT
- UNITS:
- KIT
- BASE COLOR:
- BLACK
- PRODUCT NAME:
- USB PIG TAIL HARNESS
- MODEL:
- THUNDERMAX
- RIDING STYLE:
- STREET
$20.95 -
THUNDERMAX ECM with Auto Tune - '17+ FLHT 309-588
THUNDERMAX
$1,088.95Factory ECM tuning leaves performance on the table—the THUNDERMAX ECM with Auto-Tune gives you closed-loop control over your air/fuel ratio, ignition timing, and startup maps without requiring expensive dyno sessions. Load the map that matches your...10202664- SKU:
- 10202664
- Availability:
- Ships Same Business Day
- Weight:
- 2.30 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- TUNING SYSTEM
- UNITS:
- KIT
$1,088.95 -
THUNDERMAX ECU with Auto Tune - '18 Softail 309-589
THUNDERMAX
$1,088.95Factory ECUs limit your Softail's potential, leaving performance gains on the table and throttle response compromised. The ThunderMax ECU with Auto-Tune replaces guesswork with precision—continuously self-adjusting your air/fuel ratio across all riding...10202795- SKU:
- 10202795
- Availability:
- Ships Same Business Day
- Weight:
- 2.35 LBS
- BASE COLOR:
- BLACK
- FEATURE:
- INCLUDES TWO OXYGEN SENSORS
- PHYSICAL CONNECTION:
- PLUG-IN (OEM STYLE CONNECTORS)
- PRODUCT NAME:
- ELECTRONIC CONTROL MODULE
- MODEL:
- THUNDERMAX
- OXYGEN LOOP CONTROL:
- CLOSED LOOP
- OXYGEN SENSOR BAND:
- WIDE-BAND
- PROGRAMMING:
- AUTOTUNE
- TYPE:
- AIR/FUEL RATIO
- UNITS:
- KIT
- PROGRAMMING:
- DOWNLOADABLE MAPS
- RIDING STYLE:
- STREET
$1,088.95
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.
