I have a 1986 K100 that has given me sprague clutch problems, There is apprx. 135000 miles on bike, although I have only done about 3000 of them. I have used CD2 before in the oil for a couple hundred miles, changed oil to Mobil 1 syn and the filter. The problem I have is that I do not ride bike very much and the clutch is starting to spin again, I only have about 2000 miles on the last oil change, the question is can I leave the cd2 or valve medic in the oil for a longer period of time and hopefully get the little cogs on the clutch cleaner. Any input is appreciated.