There's a wealth of information here about the R65 model, a big thing to know is that as an '87 you have a "monoshock" bike. From '79 to '84, the R65 and R65 LS had dual shocks. The motor and most other running gear is very similar, but the frames are slightly different.
If you get a chance, put your model / year / farkle in your signature, so if you have questions we can aim responses in the correct direction.
Additionally, if this is your first motorcycle, or if it's been a while since you've ridden, I highly recommend the MSF motorcycle safety course.