Well it has been a while and I thought I would report back on the Rostra performance and satisfaction thereof.
I installed mine as reported here: https://www.st-owners.com/forums/showthread.php?137354-Another-ST1100-Rostra-report
I'm sure there were doubts about the direct connection to the bell crank without a lever to add extra pull distance. I shared those doubts but am here to report that after a single 3500 mile ride it worked marvelously. I do not think I will be changing the attachment. The servo unit never really needs to use those extra mm's and the resolution of the servo motor is precise enough to handle a less levered attachment. I suppose I could add a lever and get different performance out of it and I am not saying it is perfect, but neither are many factory installed cruise units in cars.
I rode WA, Montana, Idaho, and MN roads, crossing several passes and I liked the 1 and 1/2 to 2 MPH variance as it pulled up and down hills between 74-77 mph at the extremes (usually less variance). Passing through towns it handled 35 MPH and 45 MPH settings with ease - though sometimes I buffered the initial re adjustment with a steadying grip on the throttle; that is to say: there is some learning to be had on effective input from the operator in real-world situations--just as one would add some input when driving a cruise controlled car over hilly country so one quickly learns to add a little input to smooth out any annoying behavior on this unit.
Overall a two thumbs up on the unit and passing grades on the installation method that connects the cc cable to the main throttle cable end right on the bell crank.
I installed mine as reported here: https://www.st-owners.com/forums/showthread.php?137354-Another-ST1100-Rostra-report
I'm sure there were doubts about the direct connection to the bell crank without a lever to add extra pull distance. I shared those doubts but am here to report that after a single 3500 mile ride it worked marvelously. I do not think I will be changing the attachment. The servo unit never really needs to use those extra mm's and the resolution of the servo motor is precise enough to handle a less levered attachment. I suppose I could add a lever and get different performance out of it and I am not saying it is perfect, but neither are many factory installed cruise units in cars.
I rode WA, Montana, Idaho, and MN roads, crossing several passes and I liked the 1 and 1/2 to 2 MPH variance as it pulled up and down hills between 74-77 mph at the extremes (usually less variance). Passing through towns it handled 35 MPH and 45 MPH settings with ease - though sometimes I buffered the initial re adjustment with a steadying grip on the throttle; that is to say: there is some learning to be had on effective input from the operator in real-world situations--just as one would add some input when driving a cruise controlled car over hilly country so one quickly learns to add a little input to smooth out any annoying behavior on this unit.
Overall a two thumbs up on the unit and passing grades on the installation method that connects the cc cable to the main throttle cable end right on the bell crank.
