Honda’s been on a quiet tech streak lately, and its latest patent disclosures make that hard to ignore. Newly revealed filings from late 2025 point to a fresh V4 engine in development, and this time the level of detail suggests Honda isn’t just exploring ideas. It’s solving problems.
The big theme running through these patents is simplification. Not in the sense of dumbing things down, but in making the V4 easier to package, lighter to build, and more efficient to run. Honda’s clearly learned from its last 1,200cc V4 engine, which was impressive but undeniably heavy and complex.
A story from the folks over at Motorrad Online goes deep into the details, and it's clear to see that one of the biggest changes is the lubrication system. Honda redesigned the oil circuit to reduce internal friction in the oil pump, using shorter internal passages that run directly through the engine cases. Small internal reservoirs feed key components like the stator, starter motor, water pump, and clutch. Cutting down on external oil lines improves efficiency and makes the whole engine easier to package.
