I just pulled my engine apart to replace the piston and put a new S1 Hotcam in. I think it looks like it was running a tad lean. Are my valves all right or should they be replaced? The hours are unknown on the bike. I plan on putting it together tonight and running it this weekend. It might be time to get a 07 head. Thanks The first picture the piston looks to be slightly detereated. The secon picture either the valves are detereated or have deposites on them. The cross hatching looks good, there is a line of film/carbon on top. What do you remove that with? also should i use a ball hone or some scotchbrite? Thanks again.