I used Lucas 80W90 Hypoid gear oil when I changed mine.
http://lucasoil.com/products/gear-oil/gear-oil/heavy-duty-80w-90-gear-oil
From the Owners Manual:
I've never seen one in person but I do like that it can be used with the stock grab rail.
http://www.classiccruiser.com/product.asp?item=153236
Someone here (I believe) posted the pictures I attached below.
Besides the Maxgasser, I'd say My custom made seat is the best long ride seat.
Why you ask ?
Because I spent a few days custom fitting it to fit my body !!!!
I shaped it to fit me perfectly and then added some foam to the butt area and I can ride for hours now without issue.
The stock shaped...
If you are used to Win 7, then Google the laptop model you want to purchase and Make sure there are Win 7 drivers available for it.
I recently downgraded a Dell laptop from Win 8.1 to Win 7 for a family member and it took me 5-6 hours to find all the necessary drivers needed to do it...
I will jack my 2000 off the ground and give you some measurements in the next day or two if no one else replies.
I do have (stock length) Progressive brand fork springs though not OEM Yamaha springs.