Vario downhill bike mid-drive conversion

zekill · Feb 5, 2019

Hi all,
I starting convert this great downhill bike.
I have just ordered the classic cyclone 3kw kit.

i'm planning to fit battery on the sides of the top tube (rectangular shape)
is it correct to build two packs for example 7s4p and connect them in serial for 14s8p ?
Or perhaps a rectangular 14s7p can fit below the downtube but i need to do some measures
all ideas are welcome

pwd · Feb 7, 2019

zekill said:
is it correct to build two packs for example 7s4p and connect them in serial for 14s8p ?

Looks like a fun build. Two 7s4p packs connected in series would be 14s4p. A 14s8p pack split into two equal halves would be 7s8p.

tahitiboob · Feb 7, 2019

I also in 2013 made my first bike with a vario frame impossible for me to mount the battery on the frame it was ugly coup in backpack

zekill · Feb 7, 2019

pwd said:
zekill said:

is it correct to build two packs for example 7s4p and connect them in serial for 14s8p ?

Click to expand...

Looks like a fun build. Two 7s4p packs connected in series would be 14s4p. A 14s8p pack split into two equal halves would be 7s8p.

yes, i made a mistake when i write it.
so, is it a bad thing to build a pack splitted like 7s(X)p x2 in serial with one BMS ?

zekill · Feb 7, 2019

tahitiboob said:
I also in 2013 made my first bike with a vario frame impossible for me to mount the battery on the frame it was ugly coup in backpack

I think your frame is better than mine for put a battery before tube, especially with hub motor.
your bike is beautiful

Grantmac · Feb 7, 2019

tahitiboob said:
I also in 2013 made my first bike with a vario frame impossible for me to mount the battery on the frame it was ugly coup in backpack

That frame is just begging for a mid drive and battery under the tube!

zekill · Feb 13, 2019

this is the left motor mount that i'm start to build.
it's a 3mm sheet metal.

zekill · Mar 21, 2019

custom motor clamping is done.
I weld a plug with M6 tap below the down tube so it's invisible.
Now waiting for battery pack, chain and chain tensioner.

zekill · Mar 31, 2019

zekill · Apr 15, 2019

i have try the bike today.
need a little work to finish it.
battery is 16s7p Sanyo GA, splitted in two parts.

dustyearlobe · Apr 30, 2019

Thats looking meaty cant wait to hear how she go,s :wink:

problemaddict · Sep 1, 2021

Updates?

Vario downhill bike mid-drive conversion

zekill

1 mW

pwd

10 kW

tahitiboob

1 W

zekill

1 mW

zekill

1 mW

Grantmac

10 kW

zekill

1 mW

zekill

1 mW

zekill

1 mW

zekill

1 mW

dustyearlobe

100 W

problemaddict

100 mW

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