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My biggest concern is the small parallel group of cells, 4P. This means a single weak cell, 1 weld connection broken out of 800 in a 400 cell pack - capacity is dropped to 75% if the BMS even allows it to continue to run on a group of 3 that will be overworked 33%. I also haven't seen or heard...

It seems like an ultra bee is direct competition since it isn't full size. Sure, dust has more peak power but continuous power is where I'm guessing they are fairly equal. Would be interesting to see a comparison by some 3rd party experienced riders.

For something they are wanting to manufacture and sell... I would recommend anything below 5kwh needs to be swappable.

I don't plan on wasting their time by contacting then since I have no plans to buy one. I don't care for the crowd funding approach either. If the business plan is legitimate put on some big boy pants and borrow the money to start up! I agree there aren't many options for American made parts...

It almost looks smaller than a full sized bike... Ultra bee sized... in which case since both are made with a significant amount of chinese components what is the reason for the price premium? If the claim here is "American Made", more than half of the bike should be from that origin.

Snowmobiles use a silent style chain drive that is smooth on the outside so it isn't bumping across the tensioner. When you have a billet machined motor mount/drive housing, cheap and easy isn't a good argument for your drive 😁 Its a great looking build, I'll be interested to see it finished!

2mm cell spacing is about the minimum to keep reasonable pressure drop across an immersion cooled pack, the cells will also age differently if this isn't carefully designed due to constant delta T between cells. You also need to consider stagnation of the fluid around certain cells, which is...

All that fancy aluminum machining and fab work and you use a roller chain/tensioner for a primary reduction? A custom cog tooth belt or silent style chain is what should be there. At very least use a double strand #35 in an oil bath...

Thanks for sharing! Video turned out even better than I expected!

I just finished a day of filming with MXA where they ride my SSE YZ450A, and I discuss a little what is my opinion on necessary capacity. 10kwh in a 65lb pack is what I think it will take at the highest level of racing. A couple iterations out (+115wh/cell) we will see the 4680 cell get damn...

I made a video a few weeks ago with my bike and an F150 lightning - the ability to charge the bike w the trucks battery is awesome.

...you aren't kidding. I had a conversation with the manufacturer about doing an integrated box - got a tooling price, but I couldn't get them to give me a piece price and minimum order quantity... I've started conversations with another supplier about doing the gearbox by itself, will require...

I'm getting closer on finishing uo the gearbox/ME1304, figured I'd post a quick update!

10:1 includes the chain drive, so an Alta would be closer to 14:1 total. Alta's motors are smaller with much less torque than the ME1304 or similar.

Don - Yes, I have seen that motor, in fact I have one new in box for another project. Torque constant is similar and peak power is lower, but it does spin faster.

Bob - amperage I am pulling 450 from the battery in bursts. Even at 10:1, 60mph puts the motor around 5krpm, I rarely reach 50mph on any track, I am chasing 450F power so the high ratio is critical since the ME1304 can only do ~.13Nm/A.

I'm nearly finished with a small gearbox that I'll be mounting to my ME1304 giving me a total reduction of 10:1, after testing with 6.6:1 I'm convinced that a much more significant ratio is needed to get amps down enough to actually deal with all of the heat the motor and controller are making...

I do see "Kelly 8080I..." to me that's significantly more embarassing than any pron hehe. I think QS has taken a step in the right direction with the reduction but the continuous power still makes it useless for us who ride 450cc and want that power. The ME1304 is pretty tame on torque in my...

I haven't thought that far into it yet to put a price on it... I think a somewhat universal version would be pretty easy to do!

Wanted to check in here! I'm almost finished with a design for a reduction gearbox that will bolt up to the ME1304 (and all other motors that are like this one...). With a 2:1 reduction ahead of the drive sprocket the motor can produce the same amount of torque with half the amperage, this is...