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I am sorry I did not see your comment and questions back in October. The Fets don't overheat by themselves. but contribute to the total heat inside of the battery, The Cells and connecting copper bus bar generate heat, the Discharge Fets contribute to that, as do the Charge fets, and the...

A couple friends in Florida are running those cells. They have had good luck with them. Do you plan on a quick change battery system? Mine is close to quick change, I just have to build the second battery. Here are a few pictures of my Quick Change idea. Also here are 2 YouTubes on the...

What cells did you go with. They are 5000mah by the 60ah. Amorge sure makes a nice looking battery.

I use lithium-king.com to draw up the file and then he has Send-cut-send waterjet them. He can draw them up for any bike. You give him a few measurements and about $150 and they end up at your house a week later. What bike are you building? He might have the measurements already. I add the up...

A lot of people have asked for this and I just thought I would put it here for easier access. Some of this data overlaps and me be redundant and contradicting. It is just a collection of data, good luck with it. I hope it helps And here is the link for the "New Version Cable"...

Do you mean the throttle and light switches. Those are from China. Actually Aliexpress here is a current list of all the parts I use.

Happy to see you on the Forum. We all would love yo help you. I was at the track yesterday with my 2022 KTM Electric. What great fun.

It has been so much fun helping you guys build these Ebikes. Damn, but the students are getting so much better than the teacher... I just delivered two more bike into the So Cal area, actually 3, my old YZ250F and a Honda 2005 CRF, and a Razor SX500 mod for the son of the Honda's build...

Votol is a great controller, but there are some limitations. A lot of the displays do report errors, speed, gears, and current, on the One Line format, but on the Display page in the software there is more information. But the Display page is only on a PC. I agree with Vince on the 72V, not...

I don't know the BAC8000 controller, but I just love the Votol EM260S controller. I have used them on most of my builds, I can program it, and it works. A Votol EM260S controller is $400 . I can send you a complete harness tune to put on your bike and it works. I don't have a spare EM260S...

I am kind of curious that this bike doesn't wheelie quite easily, With that low gearing. I am about 9 to 1 on mine . Yes between 8 to 9 to 1 is the right range. I have very little experience with the BAC 8000 controller, but the Votol has 3 modes and then Sport mode. In Sport mode and with...

Hey Struggle, Sorry you took that as dogging on someone's welds, but I knew that you bought it that way, and didn't do it. I am just as bad on my aluminum welds. I would recommend going to the 520 sprocket setup and when you get a good sized battery, you can run 13, or 14, / 50, and still...

Good question, yes they produce more heat. They are not good for more than 25A without creating heat, so I have been told by Amorge. But in this configuration 20S13P is about 325A (13 x 25A) , I set his Mode 3 and Sport at 350A, and you would have to hold the throttle wide open for quite a few...

So I found this rusted Razor SX500 sitting on the curb in the neighborhood. I picked it up and said what can I do with this??? much to my wife's chagrin. You can see the rusted spokes on this thing, everything exposed was rusted. So I replaced everything that rusted ( new spokes for the...

Great project. I look at the aluminum welds, and laugh, they look like mine. The only good looking aluminum welds on my builds are in spots you can't see. But they have all proven to be solid. Great choice on the X9000 V3 controller. I am going to try one of those soon. They have many...

Here is a QS138 70H V3 motor. On my bathroom scale. 26.6 lbs

It looks real nice. What cells are you using in your battery. Why did you compromise the frame. I got a 20S12P battery in the same frame with a lot of space left. We build our bike to run on the MX tracks, and I do not modify frames because of big jumps and the stress. Your work looks real...

Thanks guys for all the interesting points of view. There is a lot of diversity amongst all of us. My reason for building Electric Dirt bikes comes from riding dirt bikes for almost 60years, and having the great fortune to be able to still ride. I started building them 15 years ago because I...

People are racing YZ250F bikes and 450F with electric power trains. Practical experience says it works. Do you even ride a bike Erwin P? Here is a friend who races them in Florida with an A rider who wins on a YZ450F EBike. The wheels aren't falling off the bikes. They do 1 or 2 laps and...

If Yamaha wants to enter the Ebike market, they should follow some of what Stark is doing, but also listen to what the riders want. The weight is a killer. The Whoops at the first WSX killed the Starks, but they weren't the caliber rider as the lead riders. Yamaha has a perfectly good...