CR-E “250” Project

Bike I recently picked up and looking to make it even better than it is.

2017 CRF250R
18” rear, and 250X forks
QS138 V3
72V BAC8000
Home made 72V 34ah battery

Gearing is currently 12/63 using a 428 setup, which I think I want to change. I have a 12T 520 front sprocket that came with the bike and multiple 48-53T rear sprockets as I use the same rears on my 450

Bike is super clean, chassis etc is perfect. I picked it up for an extremely fair price as is, turn key ready to ride.

Im setting the bike up for cross country riding and racing. Most the events around here are between 5-25 miles long

Battery is way too small. Currently I get about 12-17 miles out of it depending on how I ride. I really need about 25 miles of range.

I’m thinking move to 96V 50ish ah battery if I can get something that will fit. And maybe to a Votol controller, I’ve read the ebmx is better but just not in my budget at the time.

I see lots and lots of 72v bikes but seems to me since I need a new battery anyway, may as well move up to 96v unless there’s some reason why I shouldn’t??

Here’s a few pics to enjoy

Sharp CRE, looks like a great place to start from versus from scratch.

Nice build.
Thanks for sharing your current range.
What kind cells in your 72v/34ah battery?
In middle of my build and shopping for a battery.
Found good deal on a 72v molicel p42b battery 20s9p.
Such a good deal that has me contemplating grabbing two and just swap out.
Thinking of going with that as a stage 1 build until I can find a high performance quality 96v battery.
Went x9000 v3 so can handle the volts ok at 96v.

What vendors for a 96v batts have you been checking out?

Airboy808 said:

Nice build.
Thanks for sharing your current range.
What kind cells in your 72v/34ah battery?
In middle of my build and shopping for a battery.
Found good deal on a 72v molicel p42b battery 20s9p.
Such a good deal that has me contemplating grabbing two and just swap out.
Thinking of going with that as a stage 1 build until I can find a high performance quality 96v battery.
Went x9000 v3 so can handle the volts ok at 96v.

What vendors for a 96v batts have you been checking out?

Click to expand...

P42A cells

I’d suggest 45B

Most likely having Amorge build my battery and after some research I actually think I’m sticking with 72V and probably doing a 20S14P which with 45B cells should net me around 72V60-63ah

Built my mock up battery using some specs here. Make sure it fits then get with Amorge

@Struggle:
Is that a hand operated rear brake? Cool if it is!
So you have a home made battery whose capacity is roughly 2.5 kWh but you want to use a bigger one. What are you going to do with that smaller home made one? WIll it be used as a swappable battery to extend the range of the new one?

Theo said:

@Struggle:
Is that a hand operated rear brake? Cool if it is!
So you have a home made battery whose capacity is roughly 2.5 kWh but you want to use a bigger one. What are you going to do with that smaller home made one? WIll it be used as a swappable battery to extend the range of the new one?

Click to expand...

Yeah rear hand brake

I’m going to a larger battery yes and will either sell this or use it on another project….which I don’t want to afford lol