MY19+ CRF450RL | ECU Tuning

Product Overview: 

The CRF450L/RL Tune Series delivers a comprehensive suite of calibrations for the factory ECU, tailored to various hardware configurations. Regardless of the specific setup, users can anticipate substantial improvements in both power output and drivability. Notably, low-speed drivability has been significantly enhanced compared to the stock configuration. The rider-experienced physical jerk (measured in G/s) has been rigorously characterized and reduced by nearly 50%. Additionally, the fuel cut, which contributes to abrupt deceleration (negative jerk), has been eliminated, virtually eradicating flame-out events.

This tuning series is optimized for 91 octane (R+M)/2 (95 RON) fuel and supports typical airbox modifications and common aftermarket air filters. The series is segmented into three distinct tunes based on exhaust hardware configurations:

• Stock Improved: Compatible with the stock exhaust system, with support for modifications to the existing setup.
• Stage 0.5: Requires a slip-on exhaust system, such as the Graves or FMF PowerCore4/Q4 silencers.
• Stage 1.0: Designed for a full exhaust system, such as the Yoshimura RS4, FMF Megabomb with Q4/PC4, or Graves.

Both primary and secondary fuel maps have been meticulously revised and calibrated to ensure continued operation in the event of critical system sensor failures. For instance, if the TPS sensor fails, the bike will maintain operational integrity without significant degradation in performance.

550Performance LLC provides free tune updates for existing CRF450L/RL tune customers. If you initially purchase the Stock Improved tune and later upgrade to a full exhaust system, we will update your ECU at no additional cost—customers are only responsible for shipping and handling fees.

Technical Features:

• Engine Speed Limiter: Set between 10,500 - 10,750 RPM, depending on the selected tune
• Ignition Timing: Revised tables optimized for maximum power and drivability
• Primary Fuel Mapping: Calibrated for peak power output
• Secondary Fuel Mapping: Designed for component protection
• Startup/Post-Start Fuel Mapping: Redefined for improved startup behavior
• Tip-In Accelerator Pump Fueling: Adjusted for responsive throttle input
• Deceleration Fuel Cut: Eliminated to reduce on/off throttle sensitivity

Hardware Compatibility:

• Model: 2019+ Honda CRF450L/RL
• ECU Part Numbers: 38770-MKE-A52, 38770-MKE-AK1, 38770-MKE-B41

Important Notice:

550Performance LLC is not liable for any additional charges incurred upon the arrival of products at international destinations. This includes, but is not limited to:

• Import Duties
• Import VAT
• Customs Fees
• Warehousing Fees
• Parcelforce UK Fees
• Any other charges related to the importation of goods ordered from 550Performance LLC.

Disclaimer:

FOR CLOSED COURSE COMPETITION USE ONLY. NOT INTENDED FOR STREET USE.
NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION-CONTROLLED MOTOR VEHICLES.