Sorry for the wait! So far on this blogDevelopment progressFor the ND Roadster,"Fine tuning rebuilt engine"was released today.

The concept was "a street-best specification that allows you to experience the refined feeling of 'oneness between rider and horse' even in everyday use, without compromising ease of handling or durability." This product was painstakingly crafted by skilled craftsmen in pursuit of the ideal feel that goes beyond the constraints of mass production.

We've refined the clearances, weight, and rotational balance of each part with precision that exceeds that of mass production, and modified the shapes of the ports, combustion chambers, and valve areas using our unique know-how.In addition, we've generously applied machining that requires specialized equipment, such as precision honing with a dummy head and lapping of the crankshaft, to refine the feel of the engine, allowing it to rotate smoothly from idle to the redline.
Please note that due to the nature of the product, production numbers are limited and it may take some time for delivery.

[Fine tuning rebuilt engine]
[Part number] NDA1 V5 300
[Compatible models] Roadster (ND5RE/ND5RC)
[Price including tax] ¥ 657,800
[Specifications] High-precision handmade
　　　　Fully overhauled partial engine

Additionally, we will be releasing three products that offer improved cooling efficiency, making them ideal for sporty driving.
If you install it when replacing the engine, it will save you labor, so we recommend replacing it at the same time!

①Sports radiator
The all-aluminum, two-layer core (2mm core thickness, 36mm fin pitch) improves heat dissipation by 3.5% compared to the mass-produced 14mm core, and by 18% compared to the NR-A large-capacity (25mm) core. Ample cooling performance even under heavy loads improves stability during continuous driving.

[Part number] NDA1 V5 340
[Compatible models] Roadster (ND series) MT vehicle
[Price including tax] ¥ 78,529

②Sports radiator cap
The opening pressure of 127kPa (1.3kg/cm²) raises the boiling point of the coolant, maximizing radiator performance. Heat-resistant silicone rubber is used for the seal, maintaining airtightness for a long period even at high temperatures and preventing pressure loss.

[Part number] NDA1 V5 390
[Compatible models] Roadster and others
[Price including tax] ¥ 3,300

③Sports thermostat
The opening temperature is set to 75°C (compared to the stock temperature of 88°C), and by circulating coolant to the radiator from a low temperature, the water temperature rise during sporty driving is suppressed.
The sensor section is also a high-response type equivalent to the factory one. By concentrating the coolant in the temperature-sensing section, it opens and closes quickly, contributing to stable water temperature control.

[Part number] NDA1 V5 3A0
[Compatible models] All Roadster (ND series) vehicles
[Price including tax] ¥ 8,800