iNOUE BORING
Kawasaki H2 750ss Machined Billet Cylinder Aluminized Cylinder liner Japan New
Kawasaki H2 750ss Machined Billet Cylinder Aluminized Cylinder liner Japan New
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Item Specifics
| Condition | New | Machine Type | N/A |
| Items Included | N/A | Manufacturer Part # | N/A |
| Compatible Model | H2 | Material | Aluminum |
| Superseded Part | N/A | Vintage Part | No |
| Engine Type | 2-Stroke | Brand | Kawasaki |
| Type | Cylinder | Interchange Part # | N/A |
| Manufacturer Warranty | 3 Months | OE/OEM Part # | N/A |
| Country/Region of Manufacture | Japan | Finish | Polished |
| Performance Part | Yes | UPC | N/A |
Thank you for visiting Inoue Boring shopify. Inoue Boring Co., Ltd. Original Kawasaki H2 Machined Aluminum Cylinder φ71 for Piston.
Note: The inner diameter of the machined aluminum cylinder uses an aluminum-plated cylinder equipped with the world’s only technology, and the intake and exhaust ports are bridge ports with pillars.
Why the H2 Cylinder Needed a Solution
- The H2 was well received for its strong acceleration, but the durability of the cylinder was not very good due to the emphasis on performance.
- The inner diameter of the cylinder was abnormally worn, and mechanical noise was immediately emitted.
- This had a significant impact on compression, performance, and durability.
Bridge Port Design
- Bridgeport solves all the problems associated with H2 at once. In order to prevent pistons and piston rings from jumping into the large IN/EX port, it is a process to attach a pillar.
- This is the port shape that was actually used in the H1R and H2R racer machines of the time.
What Is ICBM™ Aluminized Cylinder?
- Compared to cast iron sleeves, plated sleeves have 23 times the hardness of the plating surface.
- Since it is aluminum, it is lightweight and conducts heat well, so it improves heat dissipation.
- It does not leave rust marks, so it is recommended for those who do not have many opportunities to ride a motorcycle.
- Nowadays, it has become a commonplace technology for new sports bikes, but by using the latest aluminum plated sleeves for vintage motorcycles, it is possible to improve durability and response comparable to modern motorcycles.
For the piston size, please use the standard size φ71.0.
Please use the one and only machined cylinder in Japan for your car!
Note: If you would like a different size, we can also make it to order! Please fill out the form below.
Compatibility
| Year | Make | Model | Submodel | Notes |
| 1975 | Kawasaki | H2 | Mach IV | |
| 1974 | Kawasaki | H2 | Mach IV | |
| 1973 | Kawasaki | H2 | Mach IV | |
| 1972 | Kawasaki | H2 | Mach IV |
Frequently Asked Questions
▶ What is an ICBM™ aluminized cylinder?
Compared to cast iron sleeves, ICBM aluminized cylinder plated sleeves have 23 times the hardness of the plating surface. Since it is aluminum, it is lightweight and conducts heat well, improving heat dissipation. It does not leave rust marks, making it ideal for vintage motorcycles that are not ridden frequently.
▶ What piston size should I use?
Please use the standard size φ71.0 piston.
▶ Can I order a custom size?
Yes. If you would like a different size, we can make it to order. Please fill out the form below.
▶ What years and models is this cylinder compatible with?
This cylinder is compatible with Kawasaki H2 Mach IV from 1972 to 1975.
▶ What is the bridge port design?
The bridge port with pillars prevents pistons and piston rings from jumping into the large IN/EX port. This is the same port shape used in the H1R and H2R racer machines of the time.
Learn More About ICBM™ Technology
- H2-ICBM™ — Technology Overview
- H2 Cylinders ICBM® — Detailed Specifications
- Why We Built a Billet H2 Cylinder
- H2-ICBM™ Development Story — Episode 2
- H2 Billet Cylinder — Episode 3
- What Is ICBM™ Technology? A New Future for Vintage Engines
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Enter your engine information and click “Submit.” We’ll confirm you within one business day.
ICBM™ gives your engine alive again!
- Long-lasting super durability
- Preserve your engine while riding
- Feel the engine's pulse forever!
“We want to create a cylinder that doesn't wear down...” This has been Inoue Boring’s long-held dream. This technology dramatically improves the durability of the cylinder bore by manufacturing an aluminum sleeve and applying a special plating to the inside diameter.
Why ICBM™ is "Revolutionary”
✔ Exceptional wear resistance
✔ Lightweight
✔ Low friction (reduces ring wear)
✔ Highly resistant to seizure
✔ Excellent heat dissipation
✔ Uniform expansion rate
✔ And it’s rust-resistant!
TESTIMONIALS
”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
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