TuneFI
The only fuel controller that tunes from your engine's real data — not guesswork.
TuneFI logs throttle, RPM, injector pulse width, and wideband AFR at 100 Hz, then builds a corrected fuel map straight from your ride. You tune it from your phone — no laptop, no dyno, no black box. And on the KLX300, it's the only piggyback that also recovers the factory ignition retard above 8000 RPM.
The Advantage
Tune from your phone.
No laptop, no dyno. The app source opens up.
Learn more →See every pulse.
100 snapshots a second — RPM, throttle, injector pulse width, AFR, plus ECU sensors. ~1,000 data points a second.
Know rich or lean.
Real air-fuel ratio from any wideband controller. Measured, not guessed.
Kills the accel bog.
Adds fuel at the tail of each pulse without fighting the ECU's own acceleration enrichment — the transient bog other controllers cause.
Learn more →Gets better after you own it.
Firmware ships from the app. The Full tier keeps evolving.
Reads the factory brain.
K-line reads RPM, throttle, temps, manifold pressure, speed and FI codes through the diagnostic port.
Recovers the factory timing retard.
Above 8000 RPM the KLX300 ECU pulls timing — a power cliff built into the map. TuneFI's TPS-spoof holds timing fully advanced. The only piggyback that touches ignition. Where this project started. The data →
New Owner
Setup Guide
Wire it, pair it, tune it — step by step.
Keep Exploring
Latest Updates
All updates →Proof
TuneFI Reveal — Hardware, Software & Live Demo
ECU Sensor Access — Live Factory Data on Your Phone
Latest Lab Report
KLX300 Secondary Throttle Plate: What It Does & Why Removing It Adds Power
Decoded factory ECU maps show the KLX300 holds its secondary throttle plate (STP) at ~50% right through 7000 RPM in 1st/2nd gear — so the top half of your throttle does nothing. What it does, why Kawasaki fit it, and the honest delete tradeoff.
Pre-order & Community
Reserve a unit with a $5 deposit — Lite ($250) or Full ($350, +ignition/TPS spoof), credited to your unit, refundable until it ships.
The first production batch is building now, and the platform keeps evolving — firmware ships over the air. Technical discussion on Discord.