docw009

12A is close enough to 750W. That's the main reason. The bike was designed to meet the Canadian and US power limits. Does the S830 show...

The old blue is ground, The new black goes to it, And the new yellow/green also connects to old yellow. That;s battery power, which...

Wow. That motor sure chatters and it's gearless too, Both controllers do that?

Knowing what's possible, and trying to buy one as a hobbyist are quite different. Add a third constraint of affordability. I was quite...

I only looked at your schematic, and didn't see that on the old throttle, ground is both black and blue. Yellow is NOT ground. You have...

Let's look your old throttle's wiring diagram Red- is battery power. Black - ground for both the LED panal and the Hall device Green -...

That's a KT display that I never heard of, the LCD800. Can't find it in Google. This is just a recap from your document. P2 = magnets x...

Maybe the power wires behind the XT60 have frayed down to a few strands? That could drop 10-20 volts.

The battery is a lie. With the best cells in the world, a 7s3p arrangement will be 10.5Ah. This battery is probably 6-7 AH if you're...

P1 is (the number of magnets) x (gear ratio). Your count includes the gears turning the motor. If you're getting the right speed, then...

I think the big clue is the drop to 30V. A 52V or 48V battery with a BMS cannot show 30V on the output. If you see that, it's just...

I wouldn't call them slick but we all have different standards The Marathon tires can get pretty aggressive but are specialized in...

Motors should have different windings when offered with 20" rims versus 29* rims, You want the higher speed windings for same wheel...

Start with a full charged battery. Put it under load and monitor the Ah or WH or whatever your "coulumb counter" measures along with the...

Almost certainly either your throttle ground is broken, or you have something else (PAS, etc) connected to the throttle signal wire that...