Rieju 50cc conversion

Discussions related to motors other than hub motors.
This includes R/C motors, botttom bracket, roller and geared drives.
User avatar
eee291   10 kW

10 kW
Posts: 848
Joined: Nov 05 2015 4:35pm
Location: Austria, Burgenland

Re: Rieju 50cc conversion

Post by eee291 » May 13 2019 10:48pm

Sweet 8)

What's the top speed gearing on your moped?

larsb   10 kW

10 kW
Posts: 939
Joined: Dec 10 2014 5:12am
Location: Gothenburg, Sweden

Re: Rieju 50cc conversion

Post by larsb » May 13 2019 11:43pm

110km/h (when not restricted)
22/105 gearing
17" tires
Ride on :D

larsb   10 kW

10 kW
Posts: 939
Joined: Dec 10 2014 5:12am
Location: Gothenburg, Sweden

Re: Rieju 50cc conversion

Post by larsb » May 21 2019 1:03pm

That was short :( .. My controller died today when i was out driving. Turns out that the max battery current possible in APT AE96600 program is 250A, the only reason i got higher reading on the BMS is that the current sensor has gone whack. It showed erratic reading in the program and eventually died completely. Now motor only twitches at throttle. So much for large chunks of cheap controllers.

Damn it!
Last edited by larsb on May 22 2019 10:37am, edited 1 time in total.
Ride on :D

User avatar
eee291   10 kW

10 kW
Posts: 848
Joined: Nov 05 2015 4:35pm
Location: Austria, Burgenland

Re: Rieju 50cc conversion

Post by eee291 » May 21 2019 2:07pm

Ouch.. another one bites the dust.

I think it's worth looking into something better like the Nucular or Besc project.

larsb   10 kW

10 kW
Posts: 939
Joined: Dec 10 2014 5:12am
Location: Gothenburg, Sweden

Re: Rieju 50cc conversion

Post by larsb » May 21 2019 2:30pm

I'll try the Votol again, if it's the same for me as johnnydrive then the problems were caused by the old program. We'll see!
Ride on :D

larsb   10 kW

10 kW
Posts: 939
Joined: Dec 10 2014 5:12am
Location: Gothenburg, Sweden

Re: Rieju 50cc conversion

Post by larsb » May 25 2019 4:19pm

I later saw that controller was showing hall sensor error, i checked and one hall is dead..
Water has leaked into motor and there's salt and muck on the PCB.
image.jpeg
image.jpeg (160.27 KiB) Viewed 164 times
image.jpeg
image.jpeg (146.63 KiB) Viewed 113 times
I'll try to switch to new halls or a new PCB from QS.

There's a magnet ring behind the pcb that's also quite corroded, the rotor might also be affected. I wonder if this might be the start of the end of this motor..
Last edited by larsb on May 28 2019 1:09am, edited 1 time in total.
Ride on :D

User avatar
fechter   100 GW

100 GW
Posts: 13713
Joined: Dec 31 2006 3:23pm
Location: California Bay Area, USA

Re: Rieju 50cc conversion

Post by fechter » May 27 2019 9:50pm

That looks ugly.

Any idea where it leaked in? This is one of the constant challenges with bike design. Totally sealed tends to be bad because water can't escape, but you need to keep it out in the first place. Potting won't work on moving parts.
"One test is worth a thousand opinions"

larsb   10 kW

10 kW
Posts: 939
Joined: Dec 10 2014 5:12am
Location: Gothenburg, Sweden

Re: Rieju 50cc conversion

Post by larsb » May 27 2019 11:58pm

I guess water got in the seam of the opening in the picture or through the side covers. It was not sealed at all and since we have about 3 months of rain in the winter it gets sprayed a lot. I'll do a splash cover when i get the time.

QS will send a free pcb to replace it :thumb:
Last edited by larsb on May 28 2019 1:54pm, edited 2 times in total.
Ride on :D

User avatar
fechter   100 GW

100 GW
Posts: 13713
Joined: Dec 31 2006 3:23pm
Location: California Bay Area, USA

Re: Rieju 50cc conversion

Post by fechter » May 28 2019 7:51am

Nice on the new board. It looks like the water pooled up inside the compartment. A small drain hole on the bottom might be a good thing. If the magnet is not too damaged, you could coat it with epoxy to prevent further corrosion.
"One test is worth a thousand opinions"

Post Reply