The guy that wrote the RSTD manual, or translated it from the Japanese, or whoever put those shift points in the book.
Ok. I admit it. I'm a fairly anal guy. I do read the manual, follow the reccomendations, etc, etc.
I used to ride a V-Star 950 cruiser, nimble and quick, but when I rode with the local yamaha association last year the Ventures and RSTDs would make me work to keep up.
This year I traded up, carefully rode the beast home, read the owners manual carefully, and started riding, using the reccomended shift points. Felt like I was driving a truck. Weak acceleration, sounds like it's working hard just to get going. WTF? The guys must have modified the engine the get the acceleration I was seeing last year?
Then I found this forum. Read all the threads about shift points I could find. I'm still in break-in. 600 km and climbing rapidly. I haven't cranked it as hard as some suggest, for that reason, but, oh my, can this thing fly. Still not as nimble as my last bike, but pull?
Loving it! Loving it! Loving it!