SSS STAGE 2.1 KIT CRF300 UPGRADE KIT

SSS STAGE 2.1 KIT CRF300 UPGRADE KITSSS Stage 2. 1 Performance Upgrade Kit Honda CRF300 CR300 The SSS Stage 2. 1 Performance Upgrade Kit is engineered to unlock the true potential of the Honda CRF300 and CR300, delivering smoother throttle response, stronger mid range power, and a noticeable improvement in overall rideability. One of the most significant improvements is the considerable reduction in low RPM throttle snatchiness, resulting in smoother off idle response and far better

SSS Stage 2.1 Performance Upgrade Kit – Honda CRF300 / CR300

The SSS Stage 2.1 Performance Upgrade Kit is engineered to unlock the true potential of the Honda CRF300 and CR300, delivering smoother throttle response, stronger mid-range power, and a noticeable improvement in overall rideability.

One of the most significant improvements is the considerable reduction in low-RPM throttle snatchiness, resulting in smoother off-idle response and far better control in technical riding, traffic, and slow-speed conditions.

Developed and tested in real-world conditions and validated on the SSS Motorcycles in-house dyno, this kit is designed as a complete, matched system to ensure reliable and consistent performance gains.

Dyno-Proven Performance

Depending on the exhaust system used, rear-wheel horsepower increased from approximately 22 HP in stock form to up to 27 HP, based on testing conducted on the SSS Motorcycles dyno.

Actual results will vary depending on exhaust configuration and supporting components.

What’s Included

1 × SSS Stage 2.1 ECU (Outright Purchase)

This 2.1 ECU flash variation is specifically calibrated to run with a vented airbox lid, which is included in this kit. Fuel and ignition mapping are optimised to reduce low-RPM throttle snatchiness and improve overall power delivery.

1 × Twin Air Filter System

Increased airflow with industry-leading filtration.

1 × Twin Air Airbox Vent (Fitted to OEM Lid)

Required for correct operation of the Stage 2.1 ECU calibration and included as part of the kit.

Exhaust Compatibility

This kit is designed for use with:

Yoshimura Genuine Full Exhaust System

Motox Thailand Exhaust

SSS Performance Exhaust System 

Performance Benefits

Considerably smoother throttle response at low RPM

Significant reduction in on/off throttle snatchiness

Improved control in technical and slow-speed riding

Stronger, smoother mid-range power

Dyno-verified rear-wheel horsepower gains

Important Installation Note

If the engine warning light illuminates after installation:

Cycle the ignition key ON and OFF three (3) times

Start the motorcycle and recheck

For a step-by-step guide, visit our YouTube channel and search:

“CRF300 Engine Light – SSS Motorcycles”