I've Swapped Over Yamaha PW Series ST Motor And Also Added Yamaha Display C

[INVISIBLE]

've Swapped Over Yamaha PW Series ST Motor And Also Added Yamaha Display C Everything Is Working Spot On , Was Just Wondering How I Can Check My Battery Health 630 Battery

 

[Greg Watts]

've Swapped Over Yamaha PW Series ST Motor And Also Added Yamaha Display C Everything Is Working Spot On , Was Just Wondering How I Can Check My Battery Health 630 Battery

Everything Is Working Spot On

Glad the swap's behaving - after the bracket saga you've been having, "everything works" is basically a bank holiday for you.

On battery health: honestly, there's no simple menu on Display C where you tap through and get a "State of Health: 92%" readout the way some Bosch systems (via the eBike Flow app) offer. Yamaha's consumer-facing side mainly gives you remaining charge and ride stats - it doesn't expose cell balance, internal resistance or true capacity fade to the rider.

To actually get a health figure on a 630Wh Yamaha pack you're looking at: • A Yamaha-authorised dealer running their diagnostic tool (it can pull charge cycle count and capacity degradation from the BMS) - this is really the only route to a proper number.

• Indirect signs in the meantime: compare real-world range now vs when it was newer at the same assist level, and watch how fast it drops from 100% to the first bar - a pack that's lost capacity tends to fall off that top segment quicker than it used to.

Given you've already swapped the motor and display over, I'd double-check with the dealer that the pack, motor and display are all talking the same firmware/generation language too - mismatches there can sometimes throw up spurious errors that look like a battery problem but aren't. If you get a specific error code off Display C at any point, flag it here - that I can actually chase down.