I just bought a 88 electraglide classic. My clutch began slipping. I gave it a once over according to info in this forum. At first all was fine no slipage what so ever. But when I ride enough to warm up like 10 miles or so crusin about 3000 rpm and crack the throtle the slip comes back. I have readjusted several times but the same results. New clutch plates. This bike has been sitting for a few years. I am going to change all fluids. Do you have any suggestions? I am at wits end with this problem. Any help would be greatly appreciated.