Just bought 03 Nomad and have questions

[karospirit]

I recently purchased an 03 Nomad 1500. Since this is my second bike, and the first one was an air-cooled 650 I don't have a way to compare if it sounds right or not.
1. At about 45 mph the engine seem to make a grinding noise. It is not there at any other speed. Is that a normal noise or do I have to have the dealer check it out?
2. When I shift from 1st into 2nd gear, it makes a klunking noise. The previous owner said that it has always been like that. is that a normal occurence in the Nomad or is something wrong with the clutch?
3. When I press the clutch, the bike squeaks. It also squeaks in idle speed. What can I do about that?
4. How do I check the air suction valve? My manual doesn't talk about that

I do have more questions but I don't want to make this posting too big.

The bike was one of those that was diagnosed with high oil pressure. The shop the bike was brought to didn't know what to do about it and rebuilt the whole engine. The rebuilt engine has about 2000 miles on it.
Thanks
K "Cougar"