
Longevity for your engine, heritage in every mile.

Eternal Engine Pulse with Aluminium Sleeves
- Long-lasting, super durable
- Preserve your engine as you ride
- Feel the engine's pulse forever
“We want to create a cylinder that never wears out.”
That has been our long-held dream.
Our technology dramatically enhances cylinder-bore durability by producing aluminum sleeves and applying a proprietary plating to their inner diameter.


”Elegance Reborn: My Mach III Runs Like New”
My Kawasaki Mach III is over 50 years old. Many parts were worn out, so I used Inoue Boring’s modern engine work to bring it back. With ICBM™ treatments, it runs smooth and strong. It won First Place at a restoration contest hosted by Inoue Boring. This bike is old—but alive.
Mr.Hirakawa Kawasaki H1 Owner
Japan

”Back to Life: My Orange H1-B with ICBM™”
“After years in storage, I brought my H1-B back with Inoue Boring’s ICBM™ treatment. The old cast-iron sleeve was replaced with an aluminum one, letting me return to the standard bore. I even added a bridge port. It’s not about more power—it’s about bringing back the ride I remember.”
Mr. Katsumi Taguchi Kawasaki H1-B Owner
Japan
Blog
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H2-ICBM™︎
Here’s another highly popular ICBM™︎ shipping report! This one is an H2-ICBM™︎ for our valued customer Uematsu. (The serial number is 1183, though it’s not visible in the photo.) We’re...
H2-ICBM™︎
Here’s another highly popular ICBM™︎ shipping report! This one is an H2-ICBM™︎ for our valued customer Uematsu. (The serial number is 1183, though it’s not visible in the photo.) We’re...
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relief machining on the bridge
The process of relief machining on the bridge is performed exclusively by a vertical machining center.Although it is a simple process, it is an essential and crucial machining for Bridgeport....
relief machining on the bridge
The process of relief machining on the bridge is performed exclusively by a vertical machining center.Although it is a simple process, it is an essential and crucial machining for Bridgeport....
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surface grinding
At iB, we perform true surface grinding using grinding stones instead of milling with cutting tools for cylinder surfaces. This results in significantly higher surface smoothness and flatness, allowing us...
surface grinding
At iB, we perform true surface grinding using grinding stones instead of milling with cutting tools for cylinder surfaces. This results in significantly higher surface smoothness and flatness, allowing us...