Cruising at a high speed, such as 100 mph, in first gear on a motorcycle like the ZX10r is not recommended and can lead to various issues, including potential damage to the engine and other components. Here are a few reasons why:
Engine strain: Running the engine at extremely high RPMs for an extended period can put excessive strain on the engine components, such as the pistons, valves, and connecting rods. This can lead to accelerated wear and potentially cause mechanical failures.
Overheating: Operating at high RPMs for a prolonged time can result in increased heat generation. The engine may struggle to cool itself adequately, leading to overheating issues. Overheating can cause damage to the engine, including warped cylinder heads, blown gaskets, or even a seized engine.
Poor fuel economy: Running the engine at such high RPMs requires more fuel, resulting in poor fuel efficiency. You'll likely burn through fuel much faster than usual, leading to frequent refueling and increased costs.
Reduced control and safety risks: Riding at high speeds in first gear can lead to reduced control and maneuverability. First gear is designed for low-speed acceleration and not intended for sustained high-speed travel. This can make it difficult to navigate turns, respond to traffic situations, and potentially increase the risk of accidents.
It's important to follow the manufacturer's recommended gear usage and speed limits for your motorcycle. Riding at excessively high RPMs in low gears for prolonged periods is generally not suitable for the engine's health, fuel efficiency, and overall safety.