Would YOU use this 1-stroke wonder? Comment below! (New videos weekly on cutting-edge engineering!) Spanish innovators InnEngine have redesigned their groundbreaking 1-stroke engines, now unveiling two models: the flagship E-REX 700cc (142 HP / 244 N·m) and the ultra-light REX-B 300cc (50 HP / 70 N·m). These 70% smaller, vibration-free engines deliver +250% more power with 22% higher efficiency than conventional designs! 00:00 How E-REX & REX-B Engines Work (Key Differences Explained) 02:33 2025 Upgrades: What's New in Both Engines?