I just worked on a K 950 at work last week and noticed the same problem with it not sealing good between the intake and carb. I used some Yamabond on the surface and that seemed to work. I was told the intake was NLA. This particular saw uses a special bar and chain for cutting concrete. I have never seen another like it. The saw also had all three clutch springs broken which I replaced. The business I work for actually had those in stock. When done the saw seemed to start, run, and idle ok.