Can a 2 Stroke Motorcycle Have a Future? Why I Started Developing a Hydrogen 2 Stroke Engine
A personal story behind our hydrogen 2 stroke motorcycle project.
For many motorcycle enthusiasts, the 2 stroke engine remains one of the greatest engine designs ever created.
It is simple, lightweight, inexpensive to manufacture, powerful, and delivers a uniquely exciting powerband. In almost every respect, the 2 stroke engine was perfectly suited to motorcycles—machines built not only for transportation, but for the joy of experiencing an engine.
Unfortunately, there was one serious problem.
The exhaust emissions were not clean enough for modern environmental regulations. As a result, mass-production manufacturers gradually stopped producing 2 stroke motorcycles.
A Ride That Changed My View of the 2 Stroke Engine
One day, I was riding my beloved BULTACO Sherpa T through the nearby hills.
I had only recently acquired the motorcycle, and every ride filled me with excitement. The lightweight chassis and responsive 2 stroke engine made every corner enjoyable.
When I reached the top of the hill, I found a group of cyclists who had climbed there under their own power.
No one said anything.
But I could feel that they were not happy to see me arrive on a noisy motorcycle trailing exhaust smoke.
What shocked me most was that I completely understood how they felt.
They had climbed the mountain using only their own strength.
I had arrived proudly on a machine that polluted the air around us.
There are people who dislike the very motorcycle I love.
And I could not say they were wrong.
The Beginning of Our Hydrogen 2 Stroke Motorcycle
On the ride home, one idea kept growing in my mind.
What if a 2 stroke motorcycle could run on hydrogen?
If hydrogen could become the fuel, the exhaust would consist primarily of water vapor. There would be no CO₂ emissions from combustion and no dirty exhaust smoke.
Perhaps then, we could continue enjoying 2 stroke motorcycles far into the future without being seen as harming the environment.
That moment became the starting point of our hydrogen motorcycle project.
More Than Ten Years of Hydrogen 2 Stroke Development
Since that day, we have continued developing a hydrogen-powered 2 stroke motorcycle for more than ten years.
Our first prototype successfully ran under its own power. It has been presented to the media and demonstrated at racing circuits.
Today, development continues with our second-generation hydrogen motorcycle, supported by many people through crowdfunding.
The project is still evolving, but our goal has never changed.
We want to preserve everything people love about the 2 stroke engine while creating a cleaner future for motorcycles.
Preserving the Future of the 2 Stroke Engine
At Inoue Boring, we believe that engineering should preserve motorcycle culture.
Our ICBM™ cylinder technology helps classic 2 stroke engines remain reliable and durable today, while our hydrogen motorcycle project explores how the 2 stroke engine itself may continue into the future.
They are different projects, but they share the same philosophy.
Keeping great motorcycles alive.
We will introduce our hydrogen 2 stroke motorcycle project in much greater detail in future articles.
FAQ: Hydrogen 2 Stroke Motorcycles
Why are 2 stroke motorcycles no longer produced by major manufacturers?
Traditional 2 stroke engines produce higher exhaust emissions than modern four-stroke engines, making it difficult for manufacturers to meet increasingly strict environmental regulations.
Can a hydrogen 2 stroke engine reduce emissions?
Hydrogen combustion can dramatically reduce carbon emissions because hydrogen contains no carbon. While technical challenges remain, hydrogen offers an exciting possibility for preserving the unique character of the 2 stroke engine.
What is ICBM™?
ICBM™ is Inoue Boring's aluminum plated cylinder sleeve technology. It improves cooling performance, durability, and wear resistance, helping preserve classic 2 stroke engines for future generations.