but it looks as if bodging the wheel size may be the only solution for max speed.
I have the Chinese version of the LCD manual, here are the settings (don't change before discussing with Andy):
P01:Backlight brightness, level 1 is the darkest, level 3 is the brightest;
P02:Mileage unit,0:KM;1:MILE;
P03:Voltage level:24V,36V,48V,60V,64V; Default 36V;
P04:Sleep time:0,Not dormant;Other numbers refer to sleep time,Range:1-60;Unit minute;
P05:Assist level: 0, 3 level mode:
1, 5level mode:
P06: Wheel diameter:unit: inch;
2#Protocol Wheel diameter:5.0~50 Accuracy:0.1 inch
5S Protocol Wheel diameter:0:16 inch, 1:18 inch, 2:20 inch, 3:22 inch,
4:24 inch, 5:26 inch, 6:700c, 7:28 inch;
This parameter is related to the displayed speed on the instrument and needs to be entered correctly;
P07: Number of speed measuring magnetic steel:range:1-100;
This parameter is related to the displayed speed on the instrument and needs to be entered correctly;
If it is a regular hub motor, directly input the number of magnetic steel;
If it is a high-speed motor, the reduction ratio needs to be calculated, and the input data is the number of magnetic steel × Reduction ratio;
For example, the number of magnetic steel in the motor is 20, and the reduction ratio is 4.3. The input data is: 86=20×4.3
P08:Speed limit:2#Protocol, range 0-100km/h,100 represents unlimited speed;
5S Protocol 0-41km/h;
The input data here represents the maximum operating speed of the vehicle:For example, entering 25 indicates that the maximum operating speed of the vehicle will not exceed 25km/h; Maintain the driving speed at the set value,
- Error: ± 1km/h; (Speed limit for power assistance and rotating handle)
Note:The value here is based on kilometers. When the unit setting is converted from kilometers to miles, the speed value on the display interface will automatically be converted to the correct mile value. However, the speed limit data set in this menu under the mile interface will not be converted, which is inconsistent with the actual displayed mile speed limit value;
P09:Zero start and non zero start settings, 0: Zero start; 1: Non zero start;
P10:Drive mode setting
0: Power assisted drive (determines how much power is output through the power assisted gear, and at this time, the handle is invalid).
1 : Electric drive (driven by a rotating handle, at which point the assist gear is invalid).
2 : Coexistence of power assisted drive and electric drive.
P11:Assist sensitivity setting range:1-24;
P12:Power start intensity setting range:1-5;
P13:There are three types of magnetic steel discs for assistance: 5, 8, and 12 magnetic steel discs;
P14:Controller current limit setting default 12A range: 1-20A
P15:Controller undervoltage value
P16: ODO reset setting: Press and hold the up button for 5 seconds to reset ODO
I have emailed my supplier about the issue you raised (P08). When I get their reply, I will get back to you.