I posted this in the 1st Generation forum, but now I realize that this is the better forum for this question. My '84 VF750F sprung an oil leak somewhere on the left side of the case. The source is definitely not the valve cover. The drip-drip occurs only at speed, not at idle. The logical source is the oil ring on the end of the countershaft. That seems likely because I replaced the countershaft sprocket this spring and used the same old o-ring. So, I'll replace it. Easy enough. BUT, I am a worrier, so I worry, "What else could it be?" I imagine there are oil seals where the clutch pushrod enters the case - would that be an involved replacement? Any other obvious sources for my drip? How would I troubleshoot it?
You got it... it's the seal where the clutch pushrod enters the case. Those things always get screwed up. While you're there, turn the pushrod around so the rust won't cut up your new seal.
I've got an oil leak on the shift shaft oil seal behind the neutral switch. It's the parallelogram looking cover behind the crankcase pressure hose above the countershaft sprocket cover. You can take the neutral switch cover off to see if oil is inside. If you see oil, the shift shaft oil seal is bad. This can be replaced with the motor inside the frame, but you're going to need to replace/make the neutral cover switch gasket and the countershaft block section gasket. The oil seal itself is only about $3. But you got to take a lot off to get to it.
