Search found 2554 matches

by Offroader
Aug 10 2020 7:05pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 5086
Views: 530975

Re: Sur-Ron - New Mid drive Bike

I figured out the issue. The ground wire I used was actually the Positive 12volt wire. I connected to the +67 volt wire and the +12 volt wire. I actually got voltage from this because there was a 12,500 ohm connection from +12 volts to ground. This was enough to power my DC/DC converter even though ...
by Offroader
Aug 10 2020 1:31pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 5086
Views: 530975

Re: Sur-Ron - New Mid drive Bike

With further testing the issue comes from the negative wire and not the positive. I'm not sure where the negative wire connects to. I may just connect directly to the battery with the negative and keep the positive connected to the connector this way the key will turn on/off my 2nd dc/dc converter. ...
by Offroader
Aug 09 2020 3:45pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 5086
Views: 530975

Re: Sur-Ron - New Mid drive Bike

Any idea anyone? The battery voltage (68 volts) going to the sur-ron DC/DC converter, that which I tapped into the wires, seems to voltage sag with very little load. These are 2 smaller wires and the 68 volts (battery voltage) goes on and off when you turn the sur-ron key. Basically just the sur-ron...
by Offroader
Aug 07 2020 12:14am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 5086
Views: 530975

Re: Sur-Ron - New Mid drive Bike

Was out last night testing out my lights. Unfortunately it seems my power supply has issues as I can't draw more than 7 amps before it has a huge quick drop in voltage and eventually turns my lights off. I have to limit the lights power.

by Offroader
Aug 07 2020 12:12am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 5086
Views: 530975

Re: Sur-Ron - New Mid drive Bike

looks good offroader, its amazing how much time it takes to figure out how to retrofit stuff. With your controller, does it do auto detect for all the motor settings? Does it list what settings it detected? I ask because my controller asks for the user to input the settings and i don't know what va...
by Offroader
Aug 03 2020 9:35pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 5086
Views: 530975

Re: Sur-Ron - New Mid drive Bike

Finally built a case for my LED lights DC/DC converter. Milled from a piece of acrylic plastic. I installed it next to the sur-ron dc/dc converter because I removed the twist throttle device for a thumb throttle. This wasn't an easy job and took me an embarrassingly long time to make. I wanted it to...
by Offroader
Aug 02 2020 3:35pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 5086
Views: 530975

Re: Sur-Ron - New Mid drive Bike

This is good that the motor keeps such low temps. This means you can safely up the power to probably around 8KW maybe more and still be able to ride the bike as hard as you can in 100F ambient temps without worry of overheating. You could also run the bike with overdrive on the highway for a long ti...
by Offroader
Aug 01 2020 4:12pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 5086
Views: 530975

Re: Sur-Ron - New Mid drive Bike

Finally rode my bike with the new KTY 84 temp probe. Highest I could get the motor was 72C-74C. It mostly stayed around 65C-70C. This is with 88F outside air. This is also using 90 amps x battery voltage with a Nuclear 24 fet controller. I checked the case temp with an infared thermometer, when the ...
by Offroader
Jul 30 2020 10:30pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 5086
Views: 530975

Re: Sur-Ron - New Mid drive Bike

You used a pry bar to add more tension then the tension caused by the weight of the motor? If you loosen all the bolts the motor will fall down and that I find is too much tension.

Did you use anti seize on any of the bolts going into the motor? The bolts are steel going into the aluminum motor.
by Offroader
Jul 30 2020 12:18am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 5086
Views: 530975

Re: Sur-Ron - New Mid drive Bike

Having difficulty with the belt tension when putting the motor back. First, I'm not sure what it should feel like so that doesn't help anything. I forgot to check the tension before I removed the motor :x . The other issue is its hard to make fine adjustments to the belt tension because you have to ...
by Offroader
Jul 29 2020 10:19am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 5086
Views: 530975

Re: Sur-Ron - New Mid drive Bike

The thing that worries me is even though the nuclear controller is only pushing 90 amps X battery stock voltage, the controller seems to have more field weakening, which is notorious for overheating motors. The controller also seems to be more aggressive with how it sends power to the motor which me...
by Offroader
Jul 29 2020 8:53am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 5086
Views: 530975

Re: Sur-Ron - New Mid drive Bike

Better to use heat sink plaster. A thermal paste with adhesive properties. I did think about that when applying it, would I be better with something like a thermal epoxy or thermal adhesive. Maybe, it would make it quicker to install. Then I thought about it and thought, the way I did it makes it c...
by Offroader
Jul 28 2020 10:43pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 5086
Views: 530975

Re: Sur-Ron - New Mid drive Bike

Finally got some time to do some work on my bike. I'm finally installing a new KTY 84 temp probe in my motor as I'm a bit paranoid about the temps, especially using my nuclear controller and hot 100F summer temps. I will also install my DC/DC converter for my LED lights. This is a bitch of a job let...
by Offroader
Jul 28 2020 12:01pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 5086
Views: 530975

Re: Sur-Ron - New Mid drive Bike

Did you use the same spring rate when you switched to the Fox shock?

I got the fox forks already, and really like them. I guess you went with the 27.5" fox forks?
by Offroader
Jul 28 2020 9:18am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 5086
Views: 530975

Re: Sur-Ron - New Mid drive Bike

On-road is a lot of fun if you don't have to deal with heavy city traffic. I love riding on the few streets that are like the ones on your trail. However, Off-road riding is really tough on the body, if you really ride fast off-road you have to be in great shape. It jolts every part of your body, if...
by Offroader
Jul 15 2020 10:12pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 5086
Views: 530975

Re: Sur-Ron - New Mid drive Bike

Personally I would like the term "offroad ebike" better Dirt Ebike sounds kind of odd for some reason. I see how it relates, but offroad ebike I think will be more understandable. On another note, I saw for the first time another sur-ron while driving my car today. It passed me quickly but still a r...
by Offroader
Jul 13 2020 5:15pm
Forum: E-Bike Technical
Topic: Careful when buying KTY-84 temp sensors
Replies: 0
Views: 293

Careful when buying KTY-84 temp sensors

Lots of bikes use the KTY-84 sensors, and that is probably because they are rated for very high temperatures. Your typical NTC 10K thermistors are rated for -55 to 125C. We know ebikes can easily go above 125C. A real KTY 84 will work up to 300C. The KTY-84 sensors have been discontinued. But you wi...
by Offroader
Jul 11 2020 7:45am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 5086
Views: 530975

Re: Sur-Ron - New Mid drive Bike

Would be nice if they sold a street legal version or even a moped version. This way I can drive on the highway, then when I get off the highway remove my plates and it will be an ebike so I can blow through all the traffic lights.

This would cut my commute by 30 minutes or more depending on traffic.
by Offroader
Jul 05 2020 11:40pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 5086
Views: 530975

Re: Sur-Ron - New Mid drive Bike

Those look like nice lights to upgrade towards at some point. For now I'm trying to keep my oem lights working. I sometimes leave the key on and I guess the bulbs overheat. I have some lights from ebay but they are labeled 7 volt. Any 12 volt suggestions out there? The ones I see available look lik...
by Offroader
Jun 29 2020 11:02pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 5086
Views: 530975

Re: Sur-Ron - New Mid drive Bike

I'm working on the ultimate sur-ron lighting for night riding in the woods and parks. This will be ridiculously bright and is totally not needed. You will blind everyone who dares to look at your bike. You will have diminishing returns as your eyes will adapt to the high brightness. You will be able...
by Offroader
Jun 27 2020 10:04am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 5086
Views: 530975

Re: Sur-Ron - New Mid drive Bike

H.I.M wrote:
Jun 27 2020 2:34am
Offroader wrote:
Jun 26 2020 7:51pm
H.I.M wrote:
Jun 26 2020 3:23pm
Tell me the length of the rear wheel spokes. Thank.
Why do you want to know this? Are you talking about the stock 19" rear wheel?
Friends breaks stock spokes. You can order spokes sapim. But you need to know the size. Rear wheel 19.
They range from about 198 to 202, I would get 200mm.
by Offroader
Jun 26 2020 7:51pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 5086
Views: 530975

Re: Sur-Ron - New Mid drive Bike

H.I.M wrote:
Jun 26 2020 3:23pm
Tell me the length of the rear wheel spokes. Thank.
Why do you want to know this? Are you talking about the stock 19" rear wheel?
by Offroader
Jun 21 2020 12:29am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 5086
Views: 530975

Re: Sur-Ron - New Mid drive Bike

The washer 17 goes on bolt 13 before you install it in the kickstand, not on the backside. :thumb: I think bla bla bla, not very well from what all I've seen. I took mine apart dolt, and that's where the washer was, and that's where all the others will find it also. Quit with your bad information. ...
by Offroader
Jun 20 2020 10:23pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 5086
Views: 530975

Re: Sur-Ron - New Mid drive Bike

Are you saying it goes right under that bolt head? I could have sworn it would not fit in the recessed hole, the washer was too big. I am 99% sure about this but I can't say 100% unless I take everything apart, which is something I definitely don't want to do. I can say this, without the washer insi...
by Offroader
Jun 20 2020 12:10pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 5086
Views: 530975

Re: Sur-Ron - New Mid drive Bike

The washer 17 goes on bolt 13 before you install it in the kickstand, not on the backside. :thumb: I think the only places it can go are where I have indicated with an arrow. The washer will not fit in the recessed hole where the nut goes on and where the bolt first goes on. I placed the washer in ...