We are pleased to announce that another set of our billet cylinder has been ordered.

The three cylinders shown in the foreground are the set currently being prepared before sleeve press-fitting. The internal plating process has already been completed. After the sleeves are pressed into the billet cylinder body, the cylinders will go through the final processes of honing, bridge clearance, surface grinding, and final inspection before completion and delivery.

A Billet Cylinder Order from Kokura Yamaha in Kyushu

This billet cylinder set was ordered by Kokura Yamaha in Kyushu, Japan. We sincerely appreciate their trust and support.

Some people may say that a billet cylinder is expensive. That is understandable. A billet cylinder is not a low-cost replacement part. It is a specially machined engine component made for people who truly understand the value of preserving and rebuilding historic two-stroke engines.

However, there are certainly customers who understand the real value of a billet cylinder. This order will become our second delivered set, and that fact gives us strong encouragement.

Why a Billet Cylinder Has Value

A billet cylinder is not simply a cylinder made from aluminum. It represents a way to keep rare and historic engines alive when original cylinders are no longer available, badly damaged, or too valuable to risk.

At iB, our purpose is not to make old engines disposable. Our purpose is to keep them running into the future. That is why we combine precision machining, aluminum plated sleeve technology, and our ICBM™︎ method to create a cylinder that is not only beautiful, but also durable and serviceable.

The H2R Specification Billet Cylinder

The completed billet cylinder set visible in the background is an H2R specification version. It is planned to be installed on the test bike provided by Speed One, which can also be seen in the background.

This is not just a product display. It is part of an actual development and verification process. By installing the billet cylinder on a real running machine, we can continue to confirm its performance, durability, and practical value.

Billet Cylinder and ICBM™︎ Technology

The strength of this project is not only the billet machining itself. The true value comes from combining the billet cylinder body with iB’s ICBM™︎ technology.

ICBM™︎ replaces the traditional cast iron sleeve concept with an aluminum plated sleeve. This allows us to create a cylinder structure with excellent heat dissipation, high wear resistance, and long-term repairability.

For important historic motorcycles such as the Kawasaki H2, this approach has great meaning. A rare engine should not be treated as something that will eventually disappear. With the right engineering, it can be preserved for the future.

A Billet Cylinder Is More Than a Part

For us, a billet cylinder is more than a machined part. It is a way of protecting motorcycle culture through engineering.

The Kawasaki H2 is not just an old motorcycle. It is one of the symbolic machines of the two-stroke era. If original parts disappear, the culture around that machine also begins to fade.

That is why we believe that producing a billet cylinder has meaning. It is not only about replacing a damaged part. It is about giving an important engine another future.

FAQ – Billet Cylinder and ICBM™︎

What is a billet cylinder?

A billet cylinder is a cylinder machined from solid aluminum material rather than cast in a mold. At iB, the billet cylinder is combined with our ICBM™︎ aluminum plated sleeve technology to create a highly durable cylinder for rare and historic engines.

Why is a billet cylinder expensive?

A billet cylinder requires advanced machining, careful design, multiple precision processes, and final hand finishing. It is not a mass-produced replacement part. It is made for engines where preservation, durability, and long-term value matter more than low cost.

Can a billet cylinder help preserve old two-stroke engines?

Yes. For engines such as the Kawasaki H2, original cylinders are becoming rare and valuable. A billet cylinder combined with ICBM™︎ technology can provide a new way to keep these engines running while reducing dependence on increasingly scarce original parts.