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Long time listener, first time caller here So I will try to keep this short... Bought a used fatty a year ago and it sat in storage for a bit over winter... I took it out and tried to move it, and the rear wheel was locked up and wouldn’t go backwards.. Have been poring over this page and the Facebook page and I’ve gotten pretty far but now I need some advice I’ve replaced the throttle (the button was broken so was needed), and upgraded the controller (it came with the bike so I figured why not while I’m at it...) I didn’t think those were really solutions, so no surprise when that wasn’t a fix. Ao now the throttle works. I press down, the voltage is reading in the lcd and I can hear a “click” in the motor. But no response/movement otherwise.... am I correct in assuming this is a motor issue? Have checked all cable connections and they are good. Tested the battery, it read at 38 when off and went up to 40/41 when on... so seems like battery is good... I thought I might take it apart and check, the Luna motor instructions made it seem like a simple 3 step easy removal.. so I finally removed the rear wheel and then got to “Remove the sprocket...” I’ve read everywhere that removing the sprocket will destroy it soooo... before I destroy my sprocket and take apart my motor... are there any other issues I could check?? Or am I right in assuming it’s a motor issue? the sprocket is pretty rusty... there’s a good amount of rust in places there probably shouldn’t be rust.... I have some simple green cleaner/degreaser but would really appreciate some advice on removing rust tooo!! And I guess while I’m here, and if it’s needed, can anyone recommend a good replacement sprocket/motor?? Is luna good, despite their instructions are not so simple as they seem? what confuses me is that they don’t think you will need a new sprocket, or is that included? Thanks for listening y’all, hopefully my bike isn’t a total lost cause...

Hello everyone, I currently have an Original Sondors Fat Tire bike from 2016 (I believe). I purchased it from a friend who had performed some upgrades to it. As the bike sits today: Luna Storm 48v 20ah Battery Controller Model KT36/48ZWSRMD-SLSLD02 Rated for DC 36v or 48v, Rated current 12A Maximum current 25+-1A (Assuming this is from Luna as well) Original Motor Bafang RMG06 36v 350W(10) 26-1-1508195560-6 LCD Luna LCD Dashboard for Sondors KT-LCD3 Took the bike out for a ride the other day after it had been sitting in the garage for about a month and received a motor hall connection error on my LCD screen. Tried the usual unplugging the connection under the chainstay and making sure I had charged the battery. I'm wondering if I am able to replace the cable coming out of my motor (if that is the culprit) or if I need to replace the motor altogether. If that is the case, would anyone recommend I upgrade to a 48v motor? Would it make a difference/ work with my existing upgrades? I'm new to the forum and Ebike scene in general so I appreciate any help. Thanks!

As the title says, I'm looking for a used or new Sondors Fat Tire 350W motor. Any condition is considered, but preferably previously working. Thanks for looking!

I have had my Sondors Thin for about a year now & use it daily to get to work/home. I started noticing the bike was having trouble staying at full speed when the battery was running low a few months ago, it would keep me running at 19 instead of the full 20 when the battery was at about a quarter charge left(one bar on the screens battery indicator). Since then it has gotten progressively worse and is now down to only holding me at 16 with a low battery, when the battery is full the bike performs like it did straight out of the box but only for the first quarter of the battery or so. I have kept the bike factory except for the tires & inner tubes, I am running tubeless on the front & the standard setup on the rear at the moment, doesn't seem relevant but was advised to list any mods. I am wondering if anyone can point me in the right direction for troubleshooting this problem, I am thinking it is the controller going bad because I have taken proper care of my battery per the instructions that came with my Sondors & the fact that it performs perfectly fine when the battery is full but I would like to get some other opinions on the matter before I start replacing/upgrading anything.

Has anyone tried to upgrade the thin bikes motor from the stock 350 to a more powerful one. I would like a plug and play one if possible. I'm ordering from Electro Bike World this weekend a LT48v 14Ah battery, 25amp KT controller and a KT-LCD3 as my bike fell over last week and cracked my screen and now doesn't work. Thanks Tim from Kansas.

Hello! I have ordered a Sondors Fold the European edition (I live in Greece)..... (still waiting ) After reading many posts on the forum I got somehow confused. I know that because the new EU law all the ebikes operated in europe must have max a 250w motor and 25km/h max speed. In many posts I read that all Sondors with 250w motors, in fact are equiped with 350w motors and only the casing number changes and if you do also some changes from the lcd screen you can get even beter speed or power. Can we have a clear answer if the European edition Sondors have a trully 250w motor? Thanks in advance guys! Elias

Motor replacement 350w Bafang Hi guys, I own a Sondors Custom 350w 36v, unfortunately the motor is broken. I bought a new Bafang motor from Alibaba with the serialnumber RM G060.350.DC. The Motor came just a few days ago, but I have no clue how to switch the motor, as it seems to be different from the original? The original is on the right, and the new one is on the left. Is there maybe somebody who was able to switch these motors? I would be so glad if you could tell me how to do that!!

Controller Upgrade Risks? Hi All, I have a Sondors V2 fat with the 36v/12.8ah battery. I want to put the Luna Cycles 25a upgraded controller on it with Luna Cycles LCD screen. I know this will give me more power, but what are the risks to the motor? The motor is supposed to be pretty tough. But I risk burning it out? What would do it? Riding up a long hill? Like for a mile? Or like for a couple hundred yards? I weigh 195 lbs... thanks.

Hi all, Finally received my sondors thin ebike! I'm pleased it came right on time per sondors email and exactly as scheduled by the shipping company. I quickly assembled the bike and took it for a spin. During my ride I noticed a squealing noise coming from the rear motor. The noise increases in pitch as the wheel spins faster. Even with the battery off the noise still persist when I spin the rear wheel. I took off the rear brake caliper entirely thinking it was rubbing on the disk but that was not the case. I looked it up on youtube and found a video with the exact same noise coming from another bike. Can someone tell me how I could fix this? Thank you! Bryan

Ok. Since no one has tackled this yet, I thought I'd start a thread and build up info needed so either myself or someone here can do this when we upgrade a motor or replace a rim. The stock Bafang 350w motor has 18 holes on each side of the hub for a total of 36 spoke holes. The stock rim has 18 holes on each side as well, alternating position left to right, for a total of 36 spoke holes. The spokes appear to be 8.5" long and are bent slightly at the nipples to accommodate the lacing pattern. First task is to get the spoke lacing pattern down.