Zpao Electric Bike Manual -

A: Tighten with a long 8mm Allen key until it feels "very tight, but not grunting tight." Then ride 1 mile and re-check. Loose cranks destroy the square taper.

Note: To unlock "off-road" speed (if legal in your area), set P08 to 45. This voids the warranty per the Zpao manual. The most frequent reason people search for a "Zpao Electric Bike Manual" is an error code flashing on the display. Here is the full diagnostic table based on official Zpao technical bulletins. Zpao Electric Bike Manual

| C Code | Function | Safe Range | Zpao Stock | | :--- | :--- | :--- | :--- | | C1 | Low voltage cutoff | 30V-34V (36V) / 40V-44V (48V) | 31V / 41V | | C2 | Current limit (Amps) | 12A-17A | 15A | | C3 | Pedal assist startup time (ms) | 200-500 | 300 | | C4 | Regen braking strength | 0-5 | 0 (if no regen) | | C5 | Throttle mode | 0 (dumb) / 1 (intelligent) | 1 | A: Tighten with a long 8mm Allen key

Turn off bike. Hold UP + DOWN. Turn on bike. Release buttons after 5 seconds. This voids the warranty per the Zpao manual