Hi everybody,
so I just acquired a 1985 K100RS with lotsa miles on it (251k). Bike has a great maintenance history and runs well (except a rattle at cold startup- another topic). Here is what I observed today: at 60 mph I am downshifting from 4th to 3rd and when I briefly let go of the handlebars to see how the bike is balanced a wobble starts in the front wheel and it builds very rapidly. As soon as I hold the bars it disappears. No wobble can be felt in any other condition. Only when bike decelerates in that tempo range and when I let go of the bars. Now you may ask, why do you let go of the bars? I usually don't but none of my other 3 beemers do this. Is this a design issue with the K100RS? Any other ideas? Thanks.
so I just acquired a 1985 K100RS with lotsa miles on it (251k). Bike has a great maintenance history and runs well (except a rattle at cold startup- another topic). Here is what I observed today: at 60 mph I am downshifting from 4th to 3rd and when I briefly let go of the handlebars to see how the bike is balanced a wobble starts in the front wheel and it builds very rapidly. As soon as I hold the bars it disappears. No wobble can be felt in any other condition. Only when bike decelerates in that tempo range and when I let go of the bars. Now you may ask, why do you let go of the bars? I usually don't but none of my other 3 beemers do this. Is this a design issue with the K100RS? Any other ideas? Thanks.