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I was just checking his github page and there it says Giant batteries use canbus and are incompatible with that hack. https://github.com/gamerpaddy/yamaha-ebike-battery-dongle

Looks like it's the wire that the battery uses to send some data to the motor(like batt % etc). I read about it here using google translate some time ago https://www.pedelecforum.de/forum/index.php?threads/yamaha-reverse-engineering.39480/ Interesting it works even without it connected. I...

Actually if he buys a +6T chainring he needs a +3 links longer chain because the chain travels only on half of the chainring all the time. So a 2 links or 4 links longer chain since you can't do 3.

Try this from the manual:

Is it a narrow-wide chainring?

Maybe one of the chain linkages are locked together.

Interesting. Why are your battery numbers showing -1?

I managed to damage the chain with the new auto mode yesterday. The chain was due for replecament anyway but I'm waiting for the replacement cassette and chainring. The problem was that when I started pedaling I shifted from 7h to 6h gear but the auto mode decided to change to full power at...

I can say that after 26 cycles my battery health is still at 100%. I charge it only if I know I will ride it the next day, otherwise I keep it half charged.

Sounds like some sort of overcurrent protection of the BMS. Or possibly the battery voltage sags so much on high power that it kicks in an undervoltage protection of the BMS and shuts it down.

One of the secrets for lithium battery longevity is to keep the battery to 50-70% charged when you're not using it. So if see you'll have bad weather for the entire week, or during the winter, don't keep it fully charged for extended periods of time.

Mine does the same since it was new, only from the front disk and when I tilt into a left curve. Also does a buzzing sound when braking. The disk on the rear wheel is quiet.