Platform
CRF300L 2025
XR250 lineage — Toei's donor
AI support mecha on the Honda CRF300L — direct descendant of the XR250 the original prop rode on. Same pump gasoline, same tank. It rides like a dirt bike, balances itself at stops, follows you on foot, and fetches itself when called. No Battle Mode. The mission is the bike that comes back to you.
Actuators idle. The CRF300L rides 100% stock — by-wire hardware only shadows your inputs and never overrides them.
FULL HUMAN CONTROLUWB tag in your pocket. It trails you on foot or on trail, self-balancing with Honda Riding Assist-style steer correction. No gyros.
2–25 KM/HRTK-GNSS waypoints + LiDAR obstacle avoidance. Whistle from the app; it drives itself across open ground to you.
15–30 KM/H OPEN GROUNDAt any stop it holds itself upright — the exact trick Honda demoed at CES 2017. Drops the bike's most common failure: the slow-speed tip-over.
0 KM/H / STATIONARY| TIER | RUNS ON | JOB | WHY THERE |
| REFLEX | Bike MCU | Balance servo @500 Hz · kill switch · dead-man | Hard real-time. Phone crash ≠ fallen bike. |
| SKILLS | Jetson (bike) | LiDAR SLAM · perception · trajectory | GPU-class compute, P4. |
| COMMAND | K-A phone / K-B TC27 — docked | Voice AI · missions · modes · dash | Dock handoff = Complete Form. Undock → bike fallback, HOLD in 10 s. |
| SPEC | VALUE |
| Body | Custom matte-black 3D-printed slab — Decadriver silhouette, visible screws; LattePanda Mu Ultra inside, commission-assembled |
| Opened up | ≈ 19 × 12.5 cm × 3 cm; 7″ 1280×800 IPS touch; fullscreen launcher — no keyboard, by design |
| Deck | Touch launcher + 3× Sanwa arcade buttons printed into the shell |
| Heart | LattePanda Mu Ultra — Intel Lunar Lake, 16 GB LPDDR5X, 115 TOPS; real x86 Linux, real terminal, desktop apps |
| Power | Swappable 74 Wh USB-PD bank in the base — ~5–6 h active; USB-C PD on the bench |
| EXT bay | M.2 2280 slot — 1 TB NVMe rides inside; LTE/5G dongle or Wi-Fi 7 when it leaves the bench |
Look: a Game Boy XL grown up — matte-black slab, visible screws, Decadriver silhouette on the bench. Your GB color era, grown up.
Jobs: workshop bench by default, bag-portable street/dry · 7″ K-Touch twin — nine-tile launcher fullscreen · K-BRAIN dev box (8B-class models at ~10–15 tok/s on its iGPU) · K-DOCK bench tester · telemetry historian — every ride logged & replayed.
Modularity: M.2 2280 bay + USB-C/USB-A on the back panel — NVMe storage, LTE/5G dongle, whatever the mission needs.
Dock: garage shelf by default; optional rear-rack “Den cradle” (+$700) for street/dry missions — latched cradle, pogo-pin 20 W feed (drop-in, no cable, lifts clean in a get-off), Wi-Fi client, crash tether. Rain days it stays home.
Doesn’t gate anything — add any time (+$2,075, 20 h). Not pocket, but bag-portable; the phone still does pocket.
The owner-director path, spelled out end to end. You never swing a wrench or touch a soldering iron — every step is either a purchase, a commission, a gate you watch pass, or an agent-run desk job. Prices are supplier-listed; hours are contractor estimates at $80/h.
Buy: nothing yet — this phase is desk work. If you don't have one, a QGroundControl-class laptop ($1,200).
Commission: 2D inverted-pendulum kinematic sim of steer-correction balance (Python + ROS2 mock) plus a failure-mode matrix (by-wire fault at 40 km/h, UWB dropout mid-follow, GNSS multipath near buildings). This is remote/agent work — no shop needed.
Pre-order long-lead: Livox Mid-360 LiDAR ($750) + first Emlid Reach RS2+ ($2,700) at the end of this step so they arrive during the by-wire build.
Gate 0 — sim holds a virtual CRF300L upright at 3–25 km/h for 10 simulated minutes of trail noise. Watch the trace; no pass, no next step.
Buy (used, Swappa/Back Market grade B+): Galaxy S21+ or Pixel 7 Pro 256 GB, native UWB — $200. Rugged case + tempered glass — $30 (Amazon). LTE data SIM, any MVNO — ~$10/mo.
Commission (agent/dev, 30 h): K-Touch launcher app — 9-tile grid, jingles, mode logic, kiosk mode; K-BRAIN stack — Llama-3.2-3B Q4 + Whisper-tiny + Piper + openWakeWord, all offline ~2.5 GB, measured 10–15 tok/s on SD888-class; native UWB bring-up phone ↔ bike-side DW3000 anchors (10 h). The device is built before a single bike part is bought.
Optional parallel build — K-SLAB mission HQ (+$2,075, 20 h): all-retail kit per the K-C buy-list — Mu Ultra 256V kit $733 (lattepanda.com/dfrobot product-3147), 1 TB NVMe $50, VSDISPLAY 7″ 1280×800 touch kit $70 (ASIN B0CRNX8K29), 74 Wh PD bank $40, 3× Sanwa OBSF-30 + zero-delay encoder $35, wiring $45, shell print + 2 mm aluminum base $100 (JLCPCB/SendCutSend). Hardware $1,075; commission assembly $1,000. No keyboard, by design. Optional Den cradle later (+$700, 9 h): Tusk top rack + 4-pin pogo PD feed — drop-in power, lifts clean in a get-off, street/dry only.
Gate K — daily-driver the launcher for a week; tiles fire commands on a bench rig; native UWB ranges to one bench anchor at ±15 cm.
Buy the donor: used CRF300L, 2021–23, under 8k miles, $4,800–5,600 (CycleTrader / Facebook Marketplace / eBay Motors). Inspect: valve service done, chain & sprockets <50%, no tip-over scars on the bars.
Commission (shop): full service — oil, air filter, valve clearance check, fresh brake fluid; suspension clickers set for +25 kg payload (rear spring swap ~$120 if needed); Tusk pannier racks $180; 6 mm 6061 mounting plates on rack + handlebar clamps, $250.
You do: photograph every connector; record base ride data (0–60, braking, figure-8) as the control baseline.
Gate 1 — bike rides flawlessly stock. All later phases are additive and reversible.
Buy: Roboteq-class steering servo 15 N·m @ bars $4,500; e-bike linear brake actuator $900 (actuonix.com); throttle by-wire servo $600; hardware dead-man relay $400; Blue Sea-class inverter/relays/fuse block $800; custom harness $1,200; limit switches + E-stop $700.
Commission (shop, 80 h): bolt steering servo to triple clamp with quick-release coupling; brake servo on rear lever; throttle servo + cable on twist grip (reversible). Every connection soldered by the shop — you never touch it.
Human-priority proof (the one test that matters): servo active, yank the bars — the servo must yield every time, mechanically, not in code.
Escalation: straight-line hold at walking pace in an empty lot → 10 → 20 km/h straight lines → gentle sweepers.
Gate 2 — computer holds a straight line at 20 km/h for 500 m; dead-man proven with the cut-power yank test.
Buy: magnet array + 8-pin pogo assembly ~$120 (promaxpogopin-class), CAN-to-USB bridge ~$80, 20 W buck charge circuit ~$40, machined dock shell on RAM-Mount-class tower ~$160.
Commission (inside P2/P3 labor): dock mates at ~45°, magnets self-align in <2 s; 20 W pogo charge (full top-up ~48 min); USB2 over pogo = the handheld becomes the bike's dashboard; CAN bridge carries real commands; BLE/NFC handshake so a stranger's device gets dumb charge only.
Safety rule (never violated): docking alone never enables ignition — the physical key/fob stays a requirement. Dock = command authority, not a hotwire.
Lore skin (+$15, worth it): Final Kamen Ride jingle on mate, handlebar console backlights magenta while docked.
Buy: VectorNav VN-100 or Bosch BMI088 IMU stack $1,500; 2× Hall wheel encoders $300; 3× Qorvo DWM3000 UWB modules $450 (Mouser/Digi-Key); pocket tag $250; 2× 48 V 20 Ah Li-ion saddle packs $1,600 (em3ev.com); balance contingency $700.
Commission (90 h): IMU at CG hard-wired to compute; balance loop — steer-correction, no gyros, tuned at 3 km/h first; two bike anchors + pocket tag → follow controller; self-balancing stop-and-hold (the CES 2017 Honda trick); follow tests parking lot → gravel → mild trail.
Gate 3 — bike follows you 100 m through a parking lot, self-balances at every stop, never drops.
Buy: Jetson Orin NX 16 GB $1,300; Livox Mid-360 (from Step 0) $750; 2× Emlid Reach RS2+ rover+base $5,400; Insta360-class 360 cam $400; LTE link $150; geofence/kill-switch integration $600.
Commission (70 h): sensor fusion LiDAR + camera + RTK → local costmap (ROS2 Nav2); waypoint nav at 15–30 km/h; obstacle tests — pedestrian dummy, parked car, 30 cm drop; geofence + hard kill (relay cuts ignition + by-wire power).
Gate 4 — 20 successful fetches across a field with obstacles. The money shot: whistle from 200 m, it drives to you. Ship.
Daily: phone in pocket = FOLLOW brain. Whistle or slam the FETCH tile — it comes. At stops it holds itself upright.
Docked: K-Touch on the K-DOCK = Complete Form — all four modes armed, phone runs the HMI, logging. Undock → authority returns to bike fallback, HOLD after 10 s.
Never: Battle Mode, transformation hardware, dock-enables-ignition. The walls are held on purpose.
Standing rule — every gate is a video you watch and an approval you give. No phase starts without your GO.
| Component | Function | Status |
|---|---|---|
| Steer-by-wire servo | Computer applies steering torque; disengages fully under rider input | SHIPPING TECH |
| Brake + throttle by-wire | Speed control for autonomous modes; layered over stock controls | SHIPPING TECH |
| IMU + wheel encoders | Balance controller — steer-correction method, no reaction wheel | PROVEN (HONDA) |
| UWB follow tag | Centimeter-grade relative positioning for follow-me | SHIPPING TECH |
| RTK-GNSS (base + rover) | ~2 cm absolute positioning for fetch waypoints | SHIPPING TECH |
| 360° cam + solid-state LiDAR | Obstacle detection and path planning at low speed | SHIPPING TECH |
| Jetson Orin NX | Onboard autonomy compute; the "support mecha AI" | SHIPPING TECH |
| Trail-speed autonomy | Self-riding at pace on uneven terrain | RESEARCH-GRADE |
| Battle Mode / flight | Out of scope — power density wall, not attempted | FICTION (HELD) |