Hello to everyone and thanks in advance for all the inputs and shares. I've read as much as I've been able to and found some interesting information, but I need some help hoping I can also contribute in the future.
I'm an ex racer and builder from Spain. I'm building a Kx80e 1996 with a qs138 v3 and a votol em150sp2 with a claimed 45ah battery from gtk. The goal is to have a small bike to do some trial excursions and wheelies. Top speed not needed at all. Quick response and very low speed torque is.
After a few weeks installing everything, making the wire harness for something it should be plug and play and and trying to understand the meaning of the very short explanations of the manual, I'm a bit stuck on some issues. My present settings pages are below.
I first loaded the configuration that Siaecosys sent me for my kit. Then I had bms cutting problems when the battery gets about 50% of its capacity. From that moment I was aware of having a cheap battery (although I paid extra for a 150 amps bms update) which I have to deal with trying to make the most of it.
What I've tried so far is:
Setting the 3 speeds as shown with the idea of manually switching them as the capacity drops so I can keep riding somehow.
Then I turned the soft start of as I was realizing the throttle response was poor. It improved but not enough.
Then I read here about the issue and how sport mode could override other settings to give more reponse. However, even having the sport mode wire correctly routed to be grounded and activated on demand, It never wanted to turn on.
I still had the start torque settings to play with (those shown are the originally given) and I read here also that the flux weakening comp had something to do with it.
I tried non of them. Instead, I looked at the ports settings. The problem is that I don't have a clue what the letters mean and in the manual it's not explained. But I dared to untick the SW box where sport mode was ported at. What happened was that the sport mode came on. The desired Instant start torque appeart. Happy wheelies. But not for long. I can't use the 3 speeds now. It doesn't let me do it. I ticked the sport mode port SW box back on but nothing reverts. I'm stuck in sport mode. Not a bad place to be at, but losing the 3 speeds doesn't let me make the most of the battery.
Everytime the bms cuts I have to disconnect the monster Anderson and plug it back on.
Finally, I decided to play with soft undervoltage, trying to find a way of softening things when the battery is not capable of wheeling anymore, so I can still ride back home. I set 72 soft undervoltage and it went better about the bms cuts, but not enough. When I accelerate (still on sport mode) I get the wheelie with no problems but as the bike passes about 15mph, even rolling of a bit, the bms cuts (it's supposed to do it when it drops below 50v as described in the battery manufacturer specs).
The last thing to try which came to mind was flux wreaking. What about flux weakling demanding to many amps after the wheelie? I don't need any speed, so I set the sport mode wreaking boxes so zero. The motor didn't spin.
Although I managed to get good settings in the 3 speeds config boxes, I never fully understood their logic, nor is explained in the manual.
Sorry for the long text but I thought I rather explain everything at once given the messy thread.
Thanks again in advance for any inputs.
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