Checking my valves the other day I saw that I had sand and dirt down inside this area (where the breather goes to). As I looked down inside, I noticed that I could see the valve stems and guides but no oil in this area. I figured, strange but maybe it was normal? I rode the next day for 4 hours in 100+ degrees temps and it ran fine.
Still worrying about this I started checking around and no one else had experienced this same thing (maybe they don't check thier valves?) I even went as far as contacting Jody Weisel at Motocross Action Mag. He actually met with Yamaha
R&D about it. They had a small instance of this on one of thier test bikes that had been down many times. They believe the dirt travels up the tube when the engine is off. Yamaha
suggests using a small filter at the end of this tube to prevent this from happening again. They also mentioned that I have to take the entire head apart and flush everything really good. They think that the sand could migrate down the valve guides and cause major problems.
Does anyone have any cleaning techniques they would like to share with me so I don't have to take the entire head apart? I guess I could change my timing chain but I would rather not till after this next season.
What I am also wondering is this: how many hammerheads are out there that don't do any maintenance that are out there riding thier bikes "guilt free" not even knowing what they have inside their head? Sometimes I think I find stuff that I shouldn't be looking for...Anyone else feel that way?