it depends where you ride and how hard. i ride at 1/2to 3/4 some time full... so i change every 3 to 4 rides, also i ride at 2 to 3 hours at a, time in moderate fine dust, no mud. btw YOU NEED MODS to help you power band and fun level i.e slip on air filter 14tooth sprocket ($200.00, $25.00, $12.00 rocky mountain ATV)