I purchased my 09 Honda CRF- 450 in the fall of 08. I have owned many motorcycles in my 43 year riding career and I believe that I have worked on this bike less than the others. I have replaced tires, chains, sprockets, and one clutch. The bike has over 143 hours showing on the hour meter, the last 13 were made by the thief who had the bike for a brief time. In the 143 hours what I have not done is change the plug, check the valves, or replace the piston or rings. Now before you tell how I must be the worst mechanic and should not even own a four stroke I will tell you I am generally on top of all the above items, but this bike just keeps on starting on second to forth kick, runs like it should, and does not smoke any. This bike has been the most reliable bike I have ever owned.