- Both come with 399cc inline-four engines
- Design cues borrowed from retro models
- Still being called concepts
A pair of upcoming 400cc four-cylinder models from Honda took centre stage at the Osaka Motorcycle Show, previewing the near-production CB400 Super Four and CBR400R Four. Although officially labelled as ‘concepts’, both bikes are effectively production-ready and closely mirror the Honda CB500 Super Four and CBR500R Four models that debuted in China in late 2025.
The key change lies in the engine. The new inline-four has been reduced from 502cc to approximately 399cc to meet Japanese licensing and taxation regulations that favour sub-400cc machines. Beyond that, differences between the 400cc and 500cc versions appear minimal, largely limited to branding.
Like their larger-capacity counterparts, both bikes feature a next-generation version of Honda’s E-Clutch system, now repositioned on the left side of the engine for a more compact layout. Technical details remain limited, with no official figures for power, weight, or dimensions released so far.
What is confirmed is the use of upside-down forks from KYB, radial-mounted brakes from Nissin, and a 5-inch TFT display with smartphone connectivity. For context, Chinese homologation data shows the 502cc versions produce 71hp, with the CB500 Super Four weighing 188kg and the CBR500R Four at 189kg. Both models also feature ABS systems supplied by Astemo.
Trademark filings for the 400cc variants have appeared across multiple markets, indicating that Honda is likely planning a global rollout in the near future.
