Super73 S2 72V QS205 Build | OEM+ Street Build w/ FarDriver ND72300

[wattsup?]

Hey everyone,

Starting a build thread for my Super73 S2 project.

Intended to be a little somethin’ to get be around the neighborhood and pickleball courts shhh

The plan is basically:

• QS205 3.5T rear hub
• 72V system
• FarDriver ND72300
• Shimano M7120 brakes

Current focus areas:

• Torque arm design
• Tail section/controller packaging
• Harness routing
• Cockpit integration
• Lighting system

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Current Hardware

• Frame: Super73 S2
• Motor: QS205 72V 5000W 3.5T
• Controller: FarDriver ND72300
• Battery: 72V 20Ah Samsung 50S
• Brakes: Shimano M7120 + 203mm RT76 rotors
• Fork: Tapered inverted fork
• Cockpit: Renthal
• Full twist throttle
• Minimal switch setup

Electrical:

• QS8 service disconnect
• 72V -> 12V accessory system
• 6-way fused accessory distribution
• 1.5-series waterproof connector ecosystem

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Still finalizing a few things and open to input from people that have similar setups:

• Best torque arm strategy for slotted S73 dropouts. I have custom dropouts and then ones in the market don’t fit. Should I make a cardboard mockup and have it 3D scanned or take it to a CNC fabricator?
• Thoughts on venting vs sealing the tail electronics compartment
• Cleanest rear brake light integration setups

More updates soon.


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[wattsup?]

Things seem to be going well. Waiting for stem and titanium bolts/nuts to arrive, as well as battery before I can stage everything up. The biggest scope right now tends to be fabricating brake mounts, torque arms, and electrical/controller enclosure.

Here’s a 3D prototype of the post mount extended adapter to kill the offset.



And another 3D print in action to see what the enclosure will look like.


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[Illiteratescholar]

Lmk know when you fab torque and brake mounts I’ll buy a set asap, just started putting my qs205 s73 tonight and found out the hard way