My basic stock 91vn750 with 15K miles hits bumps and holes harder than I remember my old 900 sporty,could just be my memory,alot of abuse.I been reading all the posts I can find with this same problem. So Ill start with the oil but cant find out what weight and how much,how to change it out. My other question is how to change adjustment on my back shocks. I weigh 185 and can spin the top cover by hand between 1 and2 but thats it.Do I need a tool for this and will this help the overall ride. Not sure if spinning that cap is doing anything.Wouldnt mind trying to lower the bike also so Ill try to find some 11 inch shocks,which I think I read thats a safe start. Thanks for any input.Paulywog.