has a full hindle exhaust system, stage two jet kit and 41,000 miles on it. the clutch was replaced at 39,000 miles, oil changed at 39,500. Chain and sprockets where changed at 33,000 I used rk 525. valve cover gasket done replaced at 24,700 along with the bolts. spark plugs were replaced with iridium right after I bought it. I've had the bike since it had 17,800 miles on it and I've changed the oil every 3,000 miles as well as the oil filter. I changed or cleaned the air filter every oil change. I've always cleaned and lubed the chain so it looks like new. I only use wix filters not that frame crap.