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vexikron ,

Unfortunately as I am on mobile I cannot dm… but this may be an interesting discussion:

Is it any kind of possible to buy a kind of kit to essentially hybridize an existing bike into, if not a fully hybrid vehicle, at least something that would charge a battery system as you drive?

I realize the most likely answer to this is basically you would have to re-engineer the bike considerably, even if youre not trying to work an electric motor and hybrid drive system into the thing, there are likely a slew of problems.

That being said… maybe someone has attempted this?

Seems like hybrid motorcycles are just barely a thing that exists for purchase… but I have not been able to find any where on the internet detailing trying to hybridize an existing bike.

Curiousfur ,

As someone who rides an already heavy bike (it’s just old), and drives a hybrid, I just don’t personally see motorcycles ever really being a meaningful use-case for hybrid tech. Batteries are heavy and current electric bikes already don’t get fantastic range, so it just doesn’t make sense to add more weight to get less range. Stop-start application may have some use in a dual clutch transmission, or maybe on pulling the clutch in, but that’s only useful in traffic, where you really want consistency and reliability when you don’t have any buffer space, and most bikes get better fuel economy anyways…

Didn’t mean to rant a bit, I was a hybrid and EV diag tech for Chevy for a bit and I gave it some thought.

1984 Honda VF700S and a 1st, then 2nd gen Toyota Highlander hybrid.

vexikron ,

Oh no need to apologize for ranting, this is exactly the kind of feedback I was looking for, thank you!

senseamidmadness OP ,

Motorcycles and battery tech really don’t go together well because batteries are inescapably heavy when scaled up to the power and range demands of a proper motorcycle. Most street bikes have at least 120 miles of range and that’s more than the first mass-market electric cars had. Hybrid would be even worse than pure electric for weight. Hence why almost nobody’s making them.

If you paid someone enough to make it, of course you could buy one. But you’d spend mansion money. A two-wheeled hybrid would have to be engineered from scratch. I can’t think of a single motorcycle made and sold in the last couple decades that hasn’t been designed specifically around its internal combustion engine. They’re not meant for easy powertrain swaps and nowadays they’re built tightly together. Balance is also incredibly important on a motorcycle and even just a few pounds in the right places can massively change how it rides.

Small motorcycles are already stupid efficient, too, so that’s another reason why a hybrid isn’t a common idea. The fuel-injected Honda Grom can achieve over 100MPG on regular gas and fuel-injected scooters can get even more. What would be gained in fuel efficiency would be lost to the weight of the whole hybrid setup.

Anyone can attempt a home project with enough time, money, and ingenuity though.

I could perhaps see something like a Ural sidecar rig having a hybrid drivetrain thrown into it since weight and balance isn’t much of a concern. You could easily throw 200 pounds of batteries into the sidecar without causing any problems, and put a motor next to them to drive the axle from next to the outrigger wheel. Ural makes 2WD models so on those there’s already a driveshaft out there. But that’s a 3-wheeled contraption that already weighs plenty.

vexikron ,

Damn, thanks for the write up!

Wish I could add something useful to it, haha.

senseamidmadness OP ,

It’s a neat idea, but you know what the most practical “hybrid” on two wheels already is? A hybrid between human pedal power and an electric motor: the E-bike. Honestly if they weren’t so expensive they’d completely wreck the 50cc scooter market. Very similar use cases, lighter, about the same speeds, more nimble, easier to park, and better exercise. In a place with decent bicycle infrastructure they’re absolutely ideal.

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