Lego Technic Honda D15A1 - Fully Functional 12-Valve Retro Engine Build

Step back in time with this fully functional Lego Technic Honda D15A1 12-Valve Engine MOC.

A true tribute to Honda’s legendary eco engine from over 40 years ago! Built with stunning attention to detail, this Lego replica features a working water pump, alternator, and starter motor, plus a realistic exhaust and throttle system complete with a detachable air filter.

The engine faithfully follows Honda’s classic 4-stroke cycle and authentic 1-3-4-2 firing order, with a camshaft-driven distributor just like the real D15A1. All 12 functional valves, 8 intake and 4 exhaust and are driven by the same camshaft, operating perfectly in time with the rotating crankshaft at half speed. Watch the induction, compression, power, and exhaust strokes come alive in Lego form!

A nostalgic blend of mechanical precision and Lego creativity, this retro Honda D-series Technic build truly brings history back to life.

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