Hero MotoCorp’s upcoming flagship adventure motorcycle was once again spotted testing, this time in Ladakh. The highly-hidden prototype, widely expected to be called the Xpulse 421, appears to be in advanced stages of development as the company continues to evaluate it in high-stakes conditions ahead of its global debut. Once launched, the motorcycle is expected to take on rivals like the Royal Enfield Himalayan 450.The latest spy images reveal more design clues despite the camouflage. At the front, the motorcycle has a rally-inspired stance with a tall windshield and a vertically stacked LED headlamp housed within a sharply styled fairing. While the front section appears muscular and large, the rear profile is quite slim.The Xpulse 421 is expected to ride on long-travel upside-down front forks mated to a rear monoshock. Hero is likely to offer adjustable suspension, with compression and rebound adjustment at the front and preload adjustment at the rear. The test mule is also seen with a 21-inch front wheel and an 18-inch rear wheel wrapped in dual-purpose tires. Braking duties are expected to be handled by disc brakes at both ends and dual-channel ABS.Powering the new adventure bike will be a new 421cc, liquid-cooled, single-cylinder engine. While Hero MotoCorp is yet to reveal the official details, the motor is expected to produce around 40 hp and is likely to be mated to a six-speed gearbox. The test motorcycle also gave a glimpse of what appears to be a fully digital TFT instrument cluster. Although Hero MotoCorp has not officially announced a launch timeline, repeated sightings of the motorcycle in real-world testing suggest that development is progressing steadily. We can expect a global unveiling later this year.