1. What's a "peeking noise"? You must have been in a huge noisy city in China.
2. The bolt is just a threaded stud, available in other places*
(please notice the asterisk, it's there for a reason)
3. Yes, the washer is a copper crush washer and is available from Triumph, but check the Tech Vault 'cause I'm thinkin' you can get a gasket from other bike makes.
4. the asterisk "*" since you're gonna get a washer from Triumph, you may as well get a set of studs as well. And no forget the anti-seize lintiment.
5.
