Mongoose/ Dyno CX24 200 Build

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EbikeAus   100 W

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Re: Mongoose/ Dyno CX24 200 Build

Post by EbikeAus » Nov 24 2018 5:16pm

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??
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Sean9002   1 kW

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Re: Mongoose/ Dyno CX24 200 Build

Post by Sean9002 » Nov 25 2018 7:06pm

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

http://kellycontroller.com/contactors-c-32.html
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EbikeAus   100 W

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Re: Mongoose/ Dyno CX24 200 Build

Post by EbikeAus » Nov 25 2018 7:26pm

Sean9002 wrote:
Nov 25 2018 7:06pm
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 😁
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Sean9002   1 kW

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Re: Mongoose/ Dyno CX24 200 Build

Post by Sean9002 » Nov 26 2018 5:30pm

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.
OSET 20+ - Custom frame and swingarm, Motorims - 66V
Ruff Cycles Porucho - MXUS 3000w - whitewalls - Gloss black/Pearl blue/copper leaf - custom tanks - bobber saddle
Giant Glory 00 - Clyte X5404 - Hubsinks - 18FET Sinewave
Fuji Nevada S - MXUS 35mm- Hubsinks - 12FET Sinewave
39inch longboard Dual 50mm, 12s lipo

EbikeAus   100 W

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Re: Mongoose/ Dyno CX24 200 Build

Post by EbikeAus » Nov 27 2018 3:51pm

Sean9002 wrote:
Nov 26 2018 5:30pm
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
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Samd   1.21 GW

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Re: Mongoose/ Dyno CX24 200 Build

Post by Samd » Nov 28 2018 12:21am

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!
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"Knowledge is knowing that a tomato is a fruit. Wisdom is knowing that a 165mm rear shock can't deliver 220mm of rear swingarm travel." - Oprah Winfrey.

EbikeAus   100 W

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Re: Mongoose/ Dyno CX24 200 Build

Post by EbikeAus » Nov 28 2018 6:04am

Samd wrote:
Nov 28 2018 12:21am
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
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EbikeAus   100 W

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Re: Mongoose/ Dyno CX24 200 Build

Post by EbikeAus » Nov 30 2018 2:44pm

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
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EbikeAus   100 W

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Re: Mongoose/ Dyno CX24 200 Build

Post by EbikeAus » Dec 11 2018 5:57am

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.
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Re: Mongoose/ Dyno CX24 200 Build

Post by Raisedeyebrows » Jan 03 2019 5:33pm

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?
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EbikeAus   100 W

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Re: Mongoose/ Dyno CX24 200 Build

Post by EbikeAus » Jan 03 2019 11:55pm

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
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Re: Mongoose/ Dyno CX24 200 Build

Post by EbikeAus » Jan 04 2019 12:31am

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.
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EbikeAus   100 W

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Re: Mongoose/ Dyno CX24 200 Build

Post by EbikeAus » Sep 26 2019 8:57pm

Bump
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