Sur-Ron - New Mid drive Bike

[sens_dep]

Anyone know of good turn signals for the front shocks?

I used to use https://www.amazon.com/dp/B07D6JN2S...abc_48SZ44XWZX8VMH2MRMKH?_encoding=UTF8&psc=1, but the new models don’t actually work with a 12v flasher. If the white light is powered, amber is solid. They seem to be shorting because it breaks the back turn signals I use too, they simply don’t work.

I’ve opted to remove the white running light and my whole system works now. Very strange. I contacted the manufacturer and haven’t gotten a response yet.

 

[fechter]

I have what look like the same signal lights. I had to place a load resistor across the amber input to ground to make the flasher work. I think I used 150 ohm resistors. It's pretty common to need load resistors when using LED lights with a flasher. My load resistors were installed in the rear signal lights.

Another trick I figured out was to slide a long, skinny zip tie through the tube that holds the LEDs so it wraps tightly against the fork without stretching the tube.

 

[Hawaiiguy]

I also had some experiences with my '15 Zero FX that made me want to keep the tip sensor connected on my SurRon (I bought from Luna). I immediately disconnected the other SurRon cut-out sensors (brakes, kick). After almost a year, I think the tip sensor still works (been a while since I tested it though).

I installed a kill switch that cuts power if my hand comes off the handlebar( lanyard type kill switch)after installing a Bac8000 as all the safeties are removed on installation .

 

[KeithT]

I just removed my tip sensor, pretty sure it is bad. I ride a lot of very rough trail, perhaps it wears somehow. It rattles but that's no surprise. Hopefully my intermittent troubles are now over. And I've now been into every nook an cranny of the machine, well at least all the wiring. So there's dielectric grease where it should be, all connectors are cared for. Had some rust on the top controller bracket, the screws are good but the steel weld nuts rust. Had to drill one out to get under the controller.

 

[sens_dep]

I have what look like the same signal lights. I had to place a load resistor across the amber input to ground to make the flasher work. I think I used 150 ohm resistors. It's pretty common to need load resistors when using LED lights with a flasher. My load resistors were installed in the rear signal lights.

Another trick I figured out was to slide a long, skinny zip tie through the tube that holds the LEDs so it wraps tightly against the fork without stretching the tube.

Img_0893.jpg

15 ohm from the amber light straight to ground? Huh. I’ll try that. What wattage resistor? will just .5w work?

 

[fechter]

150 ohms not 15. 1/2 w should be good.

 

[sc-surfer]

New member here; thinking of buying a new Sur-Ron battery from this company in China, has anybody dealt with them. Dan
https://www.elecycles.com/sur-ron-light-bee-60v-battery.html

I bought a battery from them last year, it was shipped out of a so-cal holding company, I got it in less than a week. :thumb:

Yep. I bought from them. Took me a little longer. Maybe 3-4 weeks but had tracking all the way. Arrived intact and works perfectly. I beat Luna’s price by $500….and weren’t even in stock.


Sent from my iPhone using Tapatalk Pro

 

[sens_dep]

150 ohms not 15. 1/2 w should be good.

Oh my bad, typing too fast again. Thanks for the tip

 

[arka]

What is the P3? I have a problem with a 2020 Surron that is an electronic throttle. In the past it turned on correctly meaning the display said P1 and then E2. Since yesterday it displays P1 and then P3 and the throttle does not work. No other errors are displayed. Any ideas?

 

[noneedlessnoise]

You guys see this?

https://www.youtube.com/watch?v=d3LiKQQpENQ

 

[Hawaiiguy]

That video is kinda spooky, I have a Bac8000 and Litespeed 60v battery that has about 6 months on it.I would think the breaker should blow if shorted,must be internal on his Bac4000 to do what it did.

 

[fechter]

You guys see this?

Bet that guy had to change his shorts after that. Probably made a pretty loud bang. At least the battery didn't seem to burn. The main circuit breaker is pretty hard to trip. It has to be overloaded for some time before it heats up enough to trip. That thing blew quickly and the short turned into plasma. Interesting that it was just sitting there and it took a second or so after turning on the power.

 

[noneedlessnoise]

That’s my bike and me in the video. The bike has a prototype Luna 72v battery on it which uses dual xt90s connectors for power instead of the stock connector. So it bypasses the stock power harness and breaker and plugs directly into the controller. I asked multiple times and they swore up and down it was supposed to operate without the breaker and I confirmed it was wired as intended. The lead engineer at Luna sent me a huge breakdown on why it bypasses the breaker and how. Anyway the controller grenaded as you can see and pretty much the whole bike is toast other than suspension and wheels. It was fun while it lasted.

 

[fechter]

Even if there was a circuit breaker of fuse, it may have still blown up the same way. One a part shorts, the breaker can't trip fast enough. It may have prevented things from burning after the explosion though.

It looks like the FETs blew, but it would be nice to know for sure what exactly failed. From the video, other than the controller, wiring and some plastic parts, it seems like the bike would be fixable.

 

[noneedlessnoise]

I was contacted directly by Sur Ron in china and they said they do not want me riding the bike until they investigate because they are worried the fire compromised the rigidity of the frame. The fireball was large and intense.

 

[noneedlessnoise]

From what I understand the ground wire somehow shorted the W terminal on the BAC4000 and caused an arc that blew the FETs as you said, thus a fireball. The positive discharge terminals on the battery are smoked as is the battery harness.

 

[Hawaiiguy]

I think the lack of a circuit breaker is what smoked the battery plugs even if the short was on the minus mainline.What was Luna’s thinking of not including that?I blew a fet on my Bac8000 from using a EBay Bac8000 terminal block that replaces the lower blue cover,the included screws where to short so put longer one’s,6 months later I turned the key on and went 2ft forward when it shut down.I had trouble code 1-8 which is fet shorted,tested all three phases and found one shorted.Took off the terminal cover( that replaced the stock cover) and under the grey potting found the screw had contacted a metal round rod.There was no arc evidence or smell but sounds like something similar happened,definitely self inflicted on my part but glad it wasn’t more damaging.

 

[noneedlessnoise]

No idea. They sent me a long explanation of why they eliminated the circuit breaker but a lot of the info is above my head and I was just asking because the ASI vendor wanted the info.

 

[Hawaiiguy]

Did the Luna battery have a built in Bms?My Litespeed batteries have a Bluetooth Bms where you can set up parameters like short circuit protection and how long it takes to trip.Just curious.

 

[noneedlessnoise]

It does have a BMS but Luna would not provide any information on it so I have no way to access it. I downloaded every BMS app I could find and none of them could see it.

 

[Hawaiiguy]

I use AMT Bms app but it goes to sleep after 2hrs unless balancing or charge/ discharge turns it back on.Would be interesting to see how it was setup.I installed one of these into my stock battery because I was nervous running it bypassed ,it is the 16s 80a continuous /150 intermittent set to 150amps for short protection.

 

[fechter]

Nice looking batteries!

The stock circuit breaker is rated for 100A, but will easily handle a short burst of 200A without tripping. I've been expecting mine to trip but so far it never has. The bike just speeds up so fast the current can't stay that high for very long. Maybe with field weakening it might be another story. Someplace I have a graph of current vs. time to trip the breaker but I can't seem to find it now.

 

[KeithT]

FWIW my intermittent problems on my 2019X became continuous, no go. After reviewing all the possibilities, I replaced the controller, it's fixed.

Trouble begin with occasional erratic throttle response and a few reluctant starts. Replaced stock with electric throttle, got a few more rides but still had rare weird response to first twist. Then dead. All safeties disconnected, all wiring and connectors good, hall sensors good, throttle voltage good, so needed a new X controller after 18months, 500 trail miles. Unusual failure?

 

[Hawaiiguy]

It seems the latest Surron’s are having more problems than the older batch,I think Surron is getting lazy or something else is in play,last years bikes that my friends bought didn’t have problems,this year that my friends bought have had X controller issues,Rst fork issues and other little things,Luna has warranty most of the stuff but sometimes take time to sort out.

 

[stepus]

Hi, i bought surron about 3 months ago, and lookin for power upgrade. I read about controller draws 80A battery current and about 450A phase current. But i measured it and battery current i have is 60A, and peak +370, -340 Phase amps. I have a 2020 surron l1e X controller. And today i decided to modify it So i opened it and broke (-) Battery terminal - easy solderable back - so fixable, but can anyone tell me how to depotting it ? I tried Acetone and it seems to not work, only work high temperature - so i tried hotairgun, and soldering iron, and finaly loose connector and clean around (-) terminal, But i cant imagine do it for whole controller it tooks me about 2 hours so do you guys know about some gentle and not time consuming method ? Thanks i will inform you about shunt mod