I have had a problem like your talking about since the day I bought my '04 new. I will go to kick it and it will just free wheel. I can feel it try to engage, it's like the teeth aren't meshing proper. If I was racing the bike, it would be a big issue. I've got used to it not engaging. When it doesn't engage I just lift my foot and push down slow untill I feel it engage then I give it a swift kick. I would like to know what you find out. I don't want to pull my case unless it gets real bad. Thanks,
Danger