CR-E “250” Project

[DonCox]

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 that I have a lot of experience with 96V. Votol doesn't have a 96V controller. A DKD 061 display is the best in a lot of ways , smaller and good visual.
Votol EM260S is a great choice, price and size, but they have come out with a EM200 and a Em350. I don't know anything about them but imagine they are larger. I don't think they are 96V either. Ans as I said I can give you a good tune to start with, and I can help you tweak that. Merry Christmas and we'll talk to you a little later.

 

[Struggle]

So the project is ongoing.

Refreshed the look, the suspension, and a few other things. Swapped the controller from a bac8000 to a Votol em260s which @DonCox helped me get going.

I’m still waiting on my 72v65ah battery from amorge using 50xg cells. Along with am auxiliary battery which is 72v15ah also using 50xg cells and will mount in the air box. Plan is to set it up as a “reserve” battery and use only rode mode 1 limited to 100amp and use this as a get home/to the truck worst case deal.

But I have researched using a blender a little and pulling from both batteries at once…however this seems a little more sketch.

Been messing with tunes and for my cross country type riding 20-25kw is plenty of power, 250-325 ish line amps.
Now I’m new overall to this electric game; but what I’m missing is rolling power. Wheelie over an obstacle when I’m moving power. The abrupt starting power is awesome and top speed is perfectly fine. However it seems as rpm goes up torque really drops off which makes sense but seems to drop off really fast and I’m missing the lift over a mud hole or log power…or maybe I’m just missing a clutch lol.

Anyway here’s a few pics. Thanks for all the help so far.
More to come…much more.

 

[DonCox]

Hey Struggle, What battery do you have in it right now? You are probably down on amps. You may be asking for 50% power, and you might get 200A, but if you ask for 75% power, you still can't get more than 200A, when you get a 400-500A battery, you will fell the snap. I would get your gearing down to 13x 51 and with 400A, I would put on the 520 chain and sprocket

 

[Struggle]

Hey Struggle, What battery do you have in it right now? You are probably down on amps. You may be asking for 50% power, and you might get 200A, but if you ask for 75% power, you still can't get more than 200A, when you get a 400-500A battery, you will fell the snap. I would get your gearing down to 13x 51 and with 400A, I would put on the 520 chain and sprocket

Still an older 72v34ah using molicel 42s

You’re probably right, I’m chasing my tail right now with this battery. I can see voltage drop a lot under acceleration.

New battery should be here in a few weeks. It shipped right before the Chinese holiday.

I’ll just keep getting the bike dressed up and am indeed planning to get it swapped over to 520. Only place I’ve seen with front sprockets is electro & Co. crazy, I can buy 4 for my other bikes for the price of one of these

 

[Theo]

Along with am auxiliary battery which is 72v15ah also using 50xg cells and will mount in the air box. Plan is to set it up as a “reserve” battery and use only rode mode 1 limited to 100amp and use this as a get home/to the truck worst case deal.

But I have researched using a blender a little and pulling from both batteries at once…however this seems a little more sketch.

I like the idea of using both simuiltaneously because:
• splitting the cells into more than a battery increases the overall surface and as a consequence the cooling capability
• splitting the cells into more than a battery makes it easier to use as much space as possible in a motorcycle that was not designed to have such batteries
• it's easier to swap two smaller batteries than a big one in case you decide to go that way

Having one as an energy reserve only means to keep it charged 100% all the time without discharging it most of the times, which is harmful to the cells.

 

[Struggle]

I like the idea of using both simuiltaneously because:
• splitting the cells into more than a battery increases the overall surface and as a consequence the cooling capability
• splitting the cells into more than a battery makes it easier to use as much space as possible in a motorcycle that was not designed to have such batteries
• it's easier to swap two smaller batteries than a big one in case you decide to go that way

Having one as an energy reserve only means to keep it charged 100% all the time without discharging it most of the times, which is harmful to the cells.

Yes but it’s not two batteries of the same size. Same voltage yes but very different AH

I do understand that they will discharge “evenly” if connected correctly but there’s still a bit of “danger” in running parallel