New to world of the 250R bike maintenance after buying my son a Honda 2013 CRF 250R for Christmas last year. He started on a Honda 50 and has worked his way up through all of Honda's line of bikes. I ride a Honda CRF230F. Have loved Honda over the years because of the minimal maintenance. This 250R seems to be a different story. My son doesn't race the bike just trail rides in in WV. He has put around 75-80 hours on the bike since January. Bike runs great has started getting a little harder to start but not bad. We have changed the oil and cleaned the air filter after every 10-15 hours of riding. Bike has started using some oil. Last weekend after 5 hours of riding the oil dropped from full to three quarter on the dip stick. I have not checked the valve clearances. Just reading that I need to do that. I ordered a set of OEM Rings but then have been reading that most people that race the bike replace the piston with the rings. Since he just trail rides, do I need to replace the piston, what about piston pin and piston pin clip. Will I need a top end gasket set. Seems like a lot stuff for just 75-80 hours of riding. Thanks for your help.