Custom 125 mx conversion

[E_by_Gum]

Hi there folks,

I have recently acquired a new bike. Could those who know more than me look at the below settings and let me know if they look okay in general.

Qs138 90h
Fardriver nd72360
72v 70ah battery

I would like to move the torque curve up the rpm range a bit as atm just spinning off the line.

Thoughts, opinions and advice appreciated.

 

[E_by_Gum]

Couple pics of bike

 

[E_by_Gum]

Couple pics of bike

59t rear and 10t front.

 

[dominik h]

Reduce ratios in speed for the first 2-4 values to 50% and you will loose half the starting tourque.

 

[E_by_Gum]

Thanks for that. Was looking at changing StartKi and MidKi to 4 and 8 respectively.....as I understand this also has influence on when the torque is in the rev range unless I've got confused!

 

[dominik h]

Ratios in Speed is percentage of max phase amps in your actual set gear.
If you set 50% at your first rpm (500) then the controller will reduce phase amps to 170A.
You can enter every value between 1-100%, and it is better to smoothen the curve. But if you set 4 values to 50% then you will directly feel how it reacts. Afterwards change to the values you can handle on your track.

You could also work with the 3 speed gear settings to reduce phase amps overall.
For example
Gear 1 50%
Gear 2 75%
Gear 3 100%
This value gets multiplied with the settings in ratios of speed, so you have three different tourque levels.

When the controller hits the battery current limt it will automatically reduce phase amps.

 

[E_by_Gum]

Thanks Dom...where do I find the 3 gear setting you have mentioned please.

 

[dominik h]

Settings are in "Ratios in gear".
There you can set different current and speed values.
Do you have installed a switch to change between low , mid and high speed/gear?

 

[E_by_Gum]

Ah ....I see thanks, I have a switch for 2 modes, but its wired incorrectly as it's just functioning just as a on off switch.