-Change oil and oil filter every 2-3 rides or 1-2 races.
-Soak, clean and oil your air fliter every 4 hours of ride time
-Lub chain a couple hours before riding. I take my chain off as needed to soak and brush clean.
-Check/adjust valves. I check my valves every five hours of ride time to make sure they are in spec. I keep a log of the clerance and this helps me keep an eye on the top end.
This is a list of the simple mantinance that I do to my 450. If you do these simple things your bike should be good to you.
Have fun!!!!