Mongoose CX 450 Builds

[EvoBikeShop]

C rate stands for capacity (c)(4.5) times the number(30). Capacity on the battery you showed is 4500 mah, which is 4.5ah. So 30x4.5=135amps that the battery can be discharged at. There is also a c rate for charging, on your battery that is 2c or 2x4.5=9 amps. If you use 2 battery's in parallel that will double the capacity and therefore the current.

Thanks! Does anybody know the amp draw on the currie 450w?

 

[lbz5mc12]

It's rated at 16 Amps. I'm taking it that you don't pedal that much unless you're kid sized right?

 

[EvoBikeShop]

It's rated at 16 Amps. I'm taking it that you don't pedal that much unless you're kid sized right?

Actually had to pedal 3 miles this morning to go get a new motor side chain because the old one snapped. Wasnt that bad lol! Thanks for the info btw.

 

[EvoBikeShop]

It also helps that im only 5'6".

 

[lbz5mc12]

Yeah I'm 6'3", I'd look like the bear in a circus riding a small bike lol.

 

[EvoBikeShop]

Yeah I'm 6'3", I'd look like the bear in a circus riding a small bike lol.

HA HA LOL! :lol:

 

[EvoBikeShop]

Here is a little bit of progress. Dont mind the battery pack its only temporary.

 

[EvoBikeShop]

Just ordered two of these ( https://www.electric-bike-kit.com/lithium-12v-lifepo4sla-replacement.aspx ), a 24v 5amp charger, and a gng motor sprocket. Going from 9t to 13t on the motor. I already upgraded the wheel sprocket to 16t from 20t but may end up going down to 14t if the bike still isn't fast enough. Thankfully i really have no hills to climb in New Orleans.

BTW total cost for the 2 12v lifepo4's was $270 with shipping (includes $10 discount for like on FB)

 

[EvoBikeShop]

New (used) handle bars. So much more comfortable to ride! New pedal side gearing tomorrow. Lifepo4's will be in on friday! Can't wait to go on a nice long ride this weekend.

 

[EvoBikeShop]

Once everything is finished im going to strip it down, have some stuff welded and then paint the frame swingarm and battery case.

 

[EvoBikeShop]

What do you guys think of safety orange for the main frame and flat black for everything else?

 

[EvoBikeShop]

All you have to do is reverse the red and black power wires coming out of the motor. Be careful what kind of controller you use. The Currie controllers have a current limiting feature which will keep you from burning up the motor. Stick to 36V. 48V is too much and will burn up the motor at full throttle. Actually just use Currie parts, controller, throttle etc. You can get them on tncscooters.com for a good price. I say all this because I've killed my only 2 motors in the last 2 weeks and am now penniless and Ev-less. I was using a universal 24-60V scooter controller which didn't restrict the current and it killed both motors. I went with the 5 pin Currie controller and throttle and they worked fine. Does your bike have a 24 or 36V motor? If you are going to run 36V to a 24V motor, it will significantly increase your rpm and top speed and adding the south paw will take you up to 30+ mph. However it might not be as quick because I think you have a smaller wheel base so it might be closer to 25+ mph. But you'll have better acceleration. Have fun.

Which controller on tnc is the currie 36v?

 

[EvoBikeShop]

Just ate it bad at about 18mph jumping a curb. Bike and I are ok, just some road rash and sore joints. Will be putting in my lifepo4's in as soon as ups drops them off tomorrow. Looking forward to the 15lb drop in weight.

EBS

 

[EvoBikeShop]

The batteries are here. Sorry for the blurry pics, sprained my left wrist last night when i crashed. So i could only hold my camera with my right hand lol.

 

[EvoBikeShop]

Finished for now. Love the way it turned out. Will be adding one more battery and getting a 36v controller. Thanks to all for answering my questions. Will update when paint and 36v conversion are done.

EBS

 

[EvoBikeShop]

Also i attempted to change my pedal gearing. However, what i had available wouldn't work because of the difference in bb. So that and some new forks will be done sometime soon.

 

[e-biker]

Very nice build!! hope you recover soon and keep posting pics and maybe video of this sweet looking ride in action!!!!!!!!!!

 

[EvoBikeShop]

Thank you! Have to borrow a camera to take video. My phone would be too hard to hold while riding lol!

 

[EvoBikeShop]

Oh, btw total build cost at present, $450.

 

[EvoBikeShop]

Not as fast as I would like, but atleast I hit my goal of of a minium 10mi distance. Pedeled most of the time, only really used throttle when i needed it. Very happy with the results. Thinking of going to a 24in rim if i can fit it. Should clear. All in all its really coming together, a lot cheaper then a stealth lol!

 

[EvoBikeShop]

Btw also had to take it easy because of my wrist.

 

[EvoBikeShop]

Wow, hour long ride and only a little over an hour for a full charge with a 5amp charger. Love these batteries. Yea they dont have the discharge rate for you speed junkies lol. But for commuting, they work.

 

[NeilP]

Nice build apart from the stone age battery setup :lol:

 

[EvoBikeShop]

Nice build apart from the stone age battery setup :lol:

Stone age? How? I'm running LifePo4's. Wait is that a joke? Lol

 

[NeilP]

Ah sorry..I saw a picture of SLA's...I had a scan through did not immediately see pictures or reference to LiFePO4...that is what happens reading the forum on a bloody iPhone.
Gotta get myself an iPad

I saw the 'bamboo Lithium ' box and assumed that was a wooden mockup made to work out fitting of the SLA's while waiting for them to arrive