Mongoose/ Dyno CX24 200 Build

[EbikeAus]

I finally got this bike going yesterday

So far it's going well and I'm quite impressed with the way the small block motor performs, also with the 14s 50 25r pack.
It's a pretty quick little bike now.

I need an on/off switch that is capable of 52v 40 -50 Amps, any suggestions??

[Sean9002]

Add a realy/contactor so you can switch high voltage with a low voltage switch.

http://kellycontroller.com/contactors-c-32.html

[EbikeAus]

Add a realy/contactor so you can switch high voltage with a low voltage switch.

http://kellycontroller.com/contactors-c-32.html

Thanks for the reply.

Would one of these work?

https://rover.ebay.com/rover/0/0/0?mpre ... 3201938585

It's getting beyond my electrical knowledge but I'm not afraid to learn

[Sean9002]

It should do the job, the 48v will have some head room so your 52v pack shouldnt be an issue. You will need resistor going between the two large lugs (battery terminals) and a diode across the switching poles (the two small posts)

On mine im using a 10k resistor and a 200v 3amp diode.

[EbikeAus]

It should do the job, the 48v will have some head room so your 52v pack shouldnt be an issue. You will need resistor going between the two large lugs (battery terminals) and a diode across the switching poles (the two small posts)

On mine im using a 10k resistor and a 200v 3amp diode.

Thanks for that

[Samd]

That's a classic - I didn't know they were rebranded here in oz. Awesome work.

Be careful of those white BMS units - I don't think they balance. Might pay to check the difference voltages from time to time.
Cheers mate!

[EbikeAus]

That's a classic - I didn't know they were rebranded here in oz. Awesome work.

Be careful of those white BMS units - I don't think they balance. Might pay to check the difference voltages from time to time.
Cheers mate!

Thanks for that.

It's a great little bike for a conversion!
I look forward to getting the suspension sorted and tidy up the wiring.
Thanks for the heads up on the bms

[EbikeAus]

Another quick update on this build.

Still some work to do to tidy up wiring but the bike is going great!
It's funny when out riding it, people aren't sure what it is..it looks like a motorcycle but has pedals and makes no noise. You get some funny looks

https://youtu.be/9cDPtLa8MkI

[EbikeAus]

I picked up a 2002 Marzocchi bomber double crown off Ebay for this build.
They look to be in good shape but are leaking oil.
How hard is it to replace seals/ oil on a set of forks?
Or should I take it to a shop.

[Raisedeyebrows]

Did you get the forks sorted out? Is the steerer tube of sufficient length to fit the frame and have enough left for the headset?

[EbikeAus]

Hi
Yes, they wiIl fit perfectly. Im just waiting on a seal kit to get here.
They have 200mm travel so I'm going to stick with a 20" front wheel. I still have to get a wheel built as I need a a 110 x 20 boost hub to suit the forks.
There are only a couple of hubs I can find that fit the spec.
I'll post a pic of the forks soon

[EbikeAus]

I forgot to mention that I upgraded the rear shock from 135mm to 165mm, it's this one but the 165 x 38 version.
I just had to grind a little off the frame for the shoulder of the shock to fit.

https://rover.ebay.com/rover/0/0/0?mpre ... 1466850250

With the bomber forks it will be adult height.

[EbikeAus]

Bump