Ok here goes....
I'm working on a 90 trailboss and I seem to have a few questions...

1) The chain is really loose and need tightened... Can anyone tell me how to tighten it? I tried a few things and nothing seems to work...

2) When I start the bike with choke its fine but will bog so I turn off the choke and its fine for awhile but soon starts to bog again so I have to choke it again... What is the easiest way to clean the carb assuming this is the problem...

ANy help would be great....