Cant help exactly but if its just a clock you want - do what I have done and stick one on your dash/ top yoke/ fairing filler with velcrow
Also we need your help on the sprocket nut post as you have a 98
its not the mileage but its the year that is important and he has a 98 (could be 99) and my theory is that "yet " does not even come into it as 98s are not affected no matter the milage
mine is a ,98. Not had an issue with the sprocket nut but have not had the cover off so don't know if it is the modified type or not.Mileage is 38,200Doggy
Clocks with the digital time in the rev counter will not work on the early models, but the ones with the time in the speedo 2000 to 2001 will fit straight on.
I had the same for my sons 400, worked a treat until it was washed away by the over exuberant use of a pressure washer