Roger, my '16 had PR4GTs and while they were okay the front tire cupped rather quickly and as you probably also learned you need to run them around 40psi to help reduce the rate cupping. I have used Metz Z8, Pirelli Angel GT, and found problems with both of those. If you want to lighten up turn-in very significantly try Angel GT. To me, I found them much too light--not in keeping with the weight of the machine. I don't want the front steering to outrun the kinetics of leaning the bike back and forth that doesn't work well. What I discovered is Continental RoadAttack 3 GT--this tire for me has had absolutely no problems, and a big list of positive attributes the other 3 tires tried do not have. I find handling to be the best with this tire be it slow or high speed behavior. I can hold lines effortlessly, and don't have a need to make mid-turn corrections. The Pirelli's were too responsive, again for the 620lbs of the bike and my 200lb body. The other tires were certainly decent in that regard, but not as good as the conti's.
Thanks for this input on tires. I was leaning toward the Metzler Z8 mainly because I had test ridden a 2018 with Z8s and it’s on of the tires on a BMW list that I saw on a European BMW site, I forget where. I’ll reread the tire thread here with your RA3 comments.
There’s a sharp right bend in the road just down the street from my driveway. I notice that once established in the turn, the bike wants to turn-in more. Is that the PR4s expressing themselves?
Again if you can feel the quoted 3 lbs of drag on a bike sitting still you sitting on it turning the bars left or right you are a better man then me or most men and women I know.
The purpose of the steering damper is it get harder at speed IF the shaft moves back and forth to a certain point creating the resistance the damper is set to.
I can not believe anyone going down the road at 75 or 80 miles an hour can feel this 3 lbs of invasive handling.
I had a tank slapper on a '10 FJR 1300 that came out of no where and left just as suddenly. I do think the damper helped and as ws said even slowing down it took its good old time to stop the oscillation.
I dont buy the tire issues at all. I dont think it is tire or wear dependent.
Harmonics and oscillation are some strange things and while I have only had one I have seen other report them.
If I was doing anything if it bugged me I would go with a Purple color dampener and see if I could tell.
And since I am on a GS I will keep mine on, and I never gave it a though on the 15 RT except to keep that shaft clean from bug guts.
I take the warnings about damperless tank slappers very seriously.
I’ve got the damper in my hands now. It’s resistance is high even at slow rates of motion.
You’re thinking wrongly about the 3 lbs. of stiction. You never notice it while riding, but you can feel the consequence of it. One never consciously thinks about turning the bike, I’m not even sure exactly the mechanics involved in a slight lane change. A subtle weight shift and the front turns in slightly and the bike starts turning except the stiction of the damper means that my 17RT needs more than a “natural” nudge. The bike feels very slightly resistant to turn sometimes. It never feels that way without the damper. That’s the best description I can provide.
For those who never notice it, or never notice the RTW’s squirrellyness over a thick white-painted line (Bandytales has written about it many times and I notice it too), then it’s not an issue.
In any case, without the damper, the characteristics change for the better.