Why does my ranger run Lumpy at 15000 to 25000 rpm?

Running a ranger Lumpy at 15,000 to 25,000 RPM likely refers to the engine's performance characteristics, particularly in terms of tuning, exhaust, and intake modifications that enhance power at higher RPMs. This range can optimize torque and horsepower for specific applications, such as racing or off-road performance. However, it's crucial to ensure that the engine components, including the oiling system and cooling, can handle such high RPMs to prevent damage and maintain reliability. Always consult with a performance specialist to ensure safe and effective tuning.