Help! I have replaced the rubber seal on the tac drive on my 71 xs1-b, and it continues to leak oil. It leaks less than before, but still not completely fixed. This is down on the bottom of the cable where it enters the engine case. Any suggestions? What are the odds of a bad seal?
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Tachometer drive.
- Thread starter Roy
- Start date
See if you can further screw the adapter -- the threaded part -- into the housing (the housing is the part that pushes into the case cover. Also, on the other end of the housing there is an o-ring -- check condition.
Typically the shaft of the tach drive is rusty/worn the seal doesn't really stop the oil.
I’ve done this job a couple of times, it’s included in this write up with a bunch of detailed photos. You’ll have to scroll down a ways. Don’t forget that the tach drive has two spots that can leak ( a seal in the case and an o-ring on the shaft ) ……as Dogbunny said……and you usually address them both at the same time.
https://www.xs650.com/threads/mailman’s-xs2-a-full-on-restoration.51520/page-53#post-557930
https://www.xs650.com/threads/mailman’s-xs2-a-full-on-restoration.51520/page-53#post-557930
Since You've done it before you're prolly aware, but you really need the cover off to make sure you don't lose the little thrust washer at the bottom of the shaft. No way to tell with the cover on.
... unless you're positive you didn't raise the shaft and upset the washer. If the shaft wasn't disturbed, no problem.
