Setup & Settings Changing the Speed Unit from KM/H to MPH One parameter — P02 — and the two settings people change by mistake instead. Applies to: D-series Change Speed Unit from KM/H to MPH — if the player does not load, open the video on YouTube. The setting P02 controls the speed unit: Value Unit 0 KM/H 1 MPH Steps Power on the bike and open the parameter menu (the display's settings entry). Navigate to P02. Change the value — 0 for KM/H, 1 for MPH. Save and exit the menu properly. Power cycle — off, then on. Confirm the speedo now reads in the unit you chose. Watch out for The two adjacent settings are not the speed unit, and changing them causes real problems: P06 (wheel diameter) — changes speedo accuracy. Set it wrong and the displayed speed is wrong in either unit. P07 (speed signal magnets) — changes the speedo calibration. Wrong value = wrong speed reading. If your speedo is reading a plausible but incorrect number, the unit is probably fine and P06/P07 is the real problem. See the P-Setting Guide. Related P-Setting Guide How to Limit Speed Display & Settings Tutorials Index Resetting the CEMOTO Controller to Factory Settings The FarDriver dongle procedure — and the cases where a reset is the wrong answer. Applies to: D-series with the FarDriver programmable controller How to Reset CEMOTO Controller to Factory Settings | FarDriver Tutorial — if the player does not load, open the video on YouTube. What you need Item Notes FarDriver Bluetooth dongle CEMOTO D-Series part — see Spare Parts FarDriver mobile app Installed on your phone A charged 12V auxiliary supply Some procedures need the controller held powered Steps Locate the controller's programming connector — usually under the side panel or seat area. Plug in the dongle and power the bike on. Pair the dongle with the FarDriver app. Read the current parameters first and save or photograph them. A factory reset discards every value you have set, including any that were correct for your wheel size or voltage. Issue the factory reset from the app. Re-verify the critical parameters after the reset — particularly P03 (voltage), P06 (wheel diameter), P07 (magnets), P13 (magnet disk) and P15 (undervoltage). A generic factory profile will not necessarily match your bike. Power cycle and confirm the bike behaves normally at low speed. When a reset is the wrong answer A factory reset is not a diagnostic tool. Do not use it as a first response to an error code. Situation Do this instead An error code (E02, E06, E07, E08, E09, E13) Work the specific diagnostic — see Error Code Tutorials A parameter you changed produced a fault Set that parameter back to its previous value Intermittent electrical faults Check connectors — see Wiring & Connectors A genuinely scrambled or replaced controller A reset is the right tool ⚠ Warranty note. Damage caused by parameter values outside specification is not covered. Never use a reset as a way to load a more aggressive profile than the bike is rated for. See Warranty Claims. Related P-Setting Guide Wiring & Connectors Spare Parts & Compatibility Tutorials Index How to Limit Speed on a CEMOTO Electric Dirt Bike Three ways to cap the top speed — and what each one actually does. Applies to: D-series How to Limit Speed on Your CEMOTO Electric Dirt Bike | Easy Setup Tutorial — if the player does not load, open the video on YouTube. The three methods Method Parameter What it does Speed limit P08 Caps top speed. 0 = no limit; the value is in km/h Drive mode P10 0 = power, 1 = electric, 2 = coexist Start intensity P12 0– 5 — how hard the motor comes in from a stop Steps Decide which you actually want. If the concern is top speed, use P08. If the concern is how abruptly the bike launches, that is P12, not P08. Open the parameter menu and navigate to the chosen parameter. Set the value. For P08, the number is in km/h — 25 km/h ≈ 16 mph. Save, exit, and power cycle. Test at low speed in a safe open area, then confirm the cap holds. A speed cap is not the same as gentler acceleration A common misconception. Lowering P08 limits how fast the bike will eventually go. It does not change how hard it accelerates up to that speed — the bike still comes off the line just as sharply. For a new or younger rider, P12 is usually the more useful setting. Watch out for Setting P08 to 0 expecting "slow". 0 means no limit, not "stop". Assuming a speed cap makes the bike suitable for a smaller rider. Fit, reach and weight matter more than top speed — see Rider Fit & Sizing. Changing P03 or P14 while you are in the menu. Neither has anything to do with speed, and both cause real faults. Related P-Setting Guide Rider Fit & Sizing Riding Laws & Compliance Tutorials Index D-Series P-Setting Guide (P01–P17) Every controller parameter, what it does, and the handful that cause real faults when set wrong. Applies to: D-series with the FarDriver controller D-Series P-Setting Guide in 20 Seconds — if the player does not load, open the video on YouTube. Before you change anything ⚠ Read this page fully first. Two parameters — P03 (voltage) and P14 (current limit) — can damage the battery, controller and motor if set outside specification. Damage caused by out-of-spec parameter values is not covered by warranty. See Warranty Claims. Write down the current value of any parameter before you change it. The parameters Parameter Setting Notes P01 Display brightness / backlight Cosmetic P02 Speed unit — 0 = KM/H, 1 = MPH See Changing the Speed Unit P03 Voltage level Must match your pack — 36V / 48V / 72V. Wrong value = real faults P04 Dormancy / sleep timer Minutes before the display sleeps P05 Backlight brightness Cosmetic P06 Wheel diameter Affects speedo accuracy P07 Speed signal magnets 1– 255. Wrong value makes the speedo read wrong P08 Speed limit 0– 100 km/h. 0 = no limit P09 Zero-start / non-zero-start Whether the throttle works from a standstill P10 Drive mode 0 = power, 1 = electric, 2 = coexist (pedal + motor) P11 Assist sensitivity 1– 24 P12 Start intensity 0– 5. How hard the motor comes in from a stop P13 Magnet disk count 5 / 8 / 12 — must match the PAS disk fitted P14 Controller current limit Default 12 A, range 1–20 A. Above specification damages the controller and motor P15 Undervoltage threshold Protects the pack from over-discharge. Do not lower this to chase range P16 ODO reset Long-press up for ~5 seconds to clear P17 Cruise control On/off The three that actually matter P03 voltage. Set it to the wrong level and the controller misreads the pack state — producing low-voltage and charging faults that look like hardware failures. P14 current limit. Raising it beyond specification is the fastest way to destroy a controller and motor. It is not a safe "free power" upgrade. P15 undervoltage. Lowering it to squeeze out more range deep-discharges the pack, which shortens its life. The protection is there for a reason. After changing a parameter Save / exit the menu properly. Power cycle — off, then on. Confirm the expected change (speedo unit, speed cap, assist level). Record what you changed in the Maintenance Log. Related Display & Error Codes — full E00–E13 reference Display & Settings Changing the Speed Unit · Limit Speed · Controller Reset Tutorials Index