2017+

Harley-Davidson Milwaukee-Eight (M8)

The Milwaukee-Eight (M8) is an electronic leap forward: ride-by-wire (drive-by-wire throttle), HDLAN with authenticated messages between ECM, ABS, cluster and key fob, factory per-cylinder knock sensors. Tuning the M8 without ride-by-wire is not viable. Note: the M8 is wave 3 of the roadmap. Nothing specific to it is built, and there is no announced date.

Electronics

What is inside.

Crankshaft: VR sensor, similar pattern to Twin Cam.
Trigger wheel: 32-2 wheel preserved.
Knock sensor: OEM piezo knock sensor, one per cylinder. Reading both and pulling timing per cylinder is planned, not implemented.
Coils: Independent coils per cylinder, internal igniter.
Ride-by-wire: Yes, the bike has it — redundant TPS (2 signals), DBW motor. It needs an ECU with a throttle PID.
HDLAN: Planned, not implemented. There is no HDLAN code in the firmware today.

Practical notes

What you need to know.

No ride-by-wire means no M8 tune.
HDLAN security bypass requires hands-on technical work — not as plug-and-play as Twin Cam.
Calibration updates flow via Pistonix Garage with versioned history.

Typical builds

Where we have seen it run.

M8 Touring 107/114 + Stage 2

Worked heads, cams.

M8 Softail FXDR turbo

High-complexity build — turbo and flex fuel.

Race-only M8 drag

Dedicated drag bike, closed course only.

Pistonix Garage

Basemaps ready for this platform.

No basemaps published yet for Milwaukee-Eight. Curated calibrations land at commercial launch — join the waitlist below to get notified.

Waitlist

Be the first to know.

Pistonix is under active development. Sign up for product updates, early basemaps, invites to ride at Milwaukee Garage Drag Racing events, and priority when pre-orders open.

Monthly roadmap and firmware updates
Invite to pre-sale tuning sessions
Priority on the first batch
Early access to per-engine basemaps