I have a 09 yz450f and i am wandering what are the best things that i should do to keep it in mint condition. I know i should change the oil frequently, is yamalube semi-synthetic 10w-50 or 10w-40 good or should i be using the yamalube full synthetic? Then cleaning the air filter every ride. Is power washing the bike ok to do? Also using a fuel of an octane rating of 93 is probaly a good thing to do also. Putting lube on the chain every ride. Is there any other important things to do to keep the bike running perfect? Thanks for the help.