I talked to a guy who was about in tears in the local O'Reily auto parts last Saturday. He said he put synthetic lubricant in his bike after draining the regular oil from it. Now his clutch is slipping at high RPM. I've heard that changing things up after a few thousand miles is bad news for some bike's clutches. Can anyone educate me on this? I told him to find out what was in the crankcase before he changed it, find some of it, change back, run to operating temperature and change it again using what originally came out of it. I wouldn't have volunteered anything if he didn't sound so desperate. Am I full of cr*p?