Welcome, not an expert on 175s, those fellas may be along shortly. Best to post issues up int the correct area lots of people here watch areas of the forums for things they know.
You do have a resource in Scottsdale that I have been using for years. Western Honda has one of the better parts fiches still out there and looking at that assembly, if it was put together incorrectly by a PO or is just gummed up from sitting that is where I would start. Fiches in general usually have things broken down in how they came apart on the bike. My bet is on the dogs being clogged up or worn out if the bike has never been apart. IF it has then all bets are off.