Topic: Tach Seal Leaking 78 CB750F

[CafeDawg]

So I installed a new tach seal awhile back, and finally took the bike out for a ride and it's still leaking.  Is the seal monodirectional ie could I have put it in backwards?  Thier pretty cheap so I was going to put another one in but didn't want to repeat the mistake.  If anybody has any ideas I'd appreciate hearing them.
Respect
CD

[BobbyR]

Yes it is directional. When you buy another seal, people use seals from the 1980 DOHC as they are thicker.

[CafeDawg]

Thanks Bobby I couldn't remember and putting it in backwards seemed the most likely culprit.  Good tip on the 80 DOHC will give that one a shot.
Respect
CD

[BobbyR]

Good luck

[Jerry Rxman Griffin aka MuthaF'er]

Assuming you are talking about the seal in the valve cover, did you get it seated /bottomed out correctly?