we all make mistakes
when I got my Royal Star I wanted to bleed the clutch. There was this aftermarket cover over the clutch bleeder valve making it impossible to get a wrench on it, So I grabbed an allen wrench and took all the screws off. My 650 has the same kind of cover in the same place, the just covers the drive shaft to the back wheel.
I started pulling the cover off and oil flooded out! pushed it back on, put all the screws back in, properly torqued it back up, and luckly I did not damage the gasket and it did not leak.
I had taken the middle drive cover off. Later I figured out the stupid aftermarket chrome piece that was blocking the clutch bleeder valve was removeable with a couple of tiny (2.5mm) allen screws. Took it off and thew it away.
I thought my VS650 V twin was more or less the same as my Royal Star V4 1300... not even close.
Dont be afraid to wrench on your bike and do your own work. If you are not sure about things you can find the Yamaha Factory Service manuals on line for most of these bikes as a free pdf download. Or you can get the Clymers shop manual from amazon.