Trenavix's Site


Electric Motorcycle Building:
Generation III

Combining the best of Gen1 and Gen2

Gen2 was a large experiment, and its R&D was rough.
It was a more powerful, heavier bike with sporty components like the brembo brakes and 600A controller.
The stealth bomber frame struggled with the components - it bent and cracked from the hardcore braking and wheelies.
I had to figure out how to combine the reliability of Gen1 with the power of Gen2.

After moving back to Cali from Finland, I immediately fitted Gen1 with some vital components, like the CT-22 Dashboard.

When deciding to move to Washington State, I decided to gut Gen2 entirely into parts - and keep Gen1 ("Ol reliable") intact.
I fitted 2x 72v "cargo packs" into parallel for it to be used.. Said cargo packs were meant for Gen2's pannier bags, but Gen1 needed some battery for a bit.
Once the move was complete, I knew that I would be salvaging several high-end parts from Gen2 and morphing them into Gen1 - properly.

The move was complete. This is truly all man needs in life:

Jokes aside, I knew I had a lot of work to do (on the side of now working as a technician).
The battery on Gen2 was an IED built by UPP that I tried to improve with updated lead wiring (2AWG) and an ANT BMS.
Still, some cells were fried by then and it was just a terrible idea to have 400 cells in a single pack. They were good cells though, Samsung 35E's.
After getting settled, I ripped apart the 400 cell battery pack and tested all cells for the ones with best IRs (after a bit of charging on all individually).


I found that, if not grinding the sides off of the bomber frame (after Gen2, I recommend NOT grinding sides off - it hurts stability), I could fit a maximum of 360 cells in the frame if going with 20s. Which is 18p.


Many months of slow work and eventually I built it. 3 sub-packs wired in series with external BMS on top. Everything fit exactly as planned, and was definitely a hard cram.


I then used the cargo packs exactly as planned, in panniers. Altogether, the bike is 20s28p, 7kWh.
It can push a maximum peak of 364A (almost 28kW with voltage sag)
Of course, that meant I had to get this pic:

October 2023, I registered my motorcycle. I rode it to Washington State Patrol in Marysville, and they did a VIN inspection, and granted my bomber a VIN plate.
I could then take it to the DOL and it was granted a plate, after I showed all my part invoices. Insurance through Progressive is $75/year.
One of the bigger reasons I decided to plate it was because I frequently rode over the US/Canadian border, and got some raised eyebrows.

Here is a small gallery of some adventuring I did on it at this point between WA and BC, Canada:

Paradise, Mt Rainier, WA

Vancouver, BC, Canada

Victoria, BC, Canada (Looking toward WA)

Diablo, North Cascades, WA

Spada Lake, WA


Central Cascades, WA (Near Wallace Falls)

Central Cascades, WA (Near Index)

Horseshoe Bay, BC, Canada

Port Angeles, WA (Looking toward Victoria, BC)

Harrison Lake, BC, Canada (Cascade Peninsula)


Eventual repairs / upgrades:
I modded the QS273 motor in many ways. I had 3 different motors with different windings, and swapped stators.
One of these stators had a winding for high RPM, which allowed me to up my speed to 140km/h. A reccurring issue was that the permanent magnets on the rotor would rust from water intrusion, and the rust-water would kill the hall sensors.


After replacing the halls 3 times, I decided to coat the entire stator and rotor magnets in EL600 insulating varnish.

A year later, after riding through several extreme rainstorms, this varnish is absolutely working!


Another eventual upgrade was custom-fabricating a second brake calliper mount for dual brake rotors.
This improved braking a lot, and was vital for riding with a passenger.


A few other eventual upgrades included:
reinforced pannier brackets, a stiffer coil for the DNM-USD8 fork (huge improvement!), and various frame reinforcements custom welded by a friend in Skagit.

As of Feb 2025, the bike has nearly 43000km on the odometer and I expect the battery to surpass 80000km before considering a replacement.

Here's a walk-around video as of August 2024: