When do you know piston rings are bad in a four wheeler?

You may suspect bad piston rings in a four-wheeler if you notice excessive oil consumption, blue smoke coming from the exhaust, or a significant loss of engine power. Additionally, a drop in compression during a compression test can indicate worn or damaged rings. If the engine is producing a rattling noise or you observe oil leaks around the engine, these could also be signs of piston ring failure. Regular maintenance and monitoring engine performance can help identify these issues early.