new guy needs help

[bass5473]

hello there! i am new to this forum but have learned a lot from it reading all the posts. I have a 1981 gs750 that is leaking oil out of what I think is called thre contact breaker cover. The oil is coming out of the little drain hole towards the bottom of the case itself, I have taken cover off but appears oil is coming from back behind. Anybody that can walk me through this would be great. I have looked at several diagrams online but I still dont know which gasket I need to get. Please Help! Thank you

[Nessism]

Sounds like the crankshaft seal is leaking. You will have to remove the contact breaker plate and advance unit and then pull the seal out. Getting the new seal in properly can be somewhat tricky. I've never done one before so I'll let some of the others chime in with details.

[tkent02]

A 1981 does not have a contact breaker cover, but if it is leaking from the ignition cover, the small round one on the right end of the crankshaft, it is not a gasket problem. There is an oil seal which seals the crankshaft where it comes out of the crank case, that seal must be leaking. Your drain hole is just there to keep the ignition dry if that seal springs a leak.

The oil seal can be replaced. How much is it leaking?

[tkent02]

Good morning Ed.

A lot of folks put the seal in backwards, as it is shown backwards in some of the parts fiches.
Make sure it is sealing inwards.

Perhaps it is leaking because someone before you put it in backwards.
Post a picture of your seal before you remove it, we can see if it is in right.

[bass5473]

Thanks for the info, it is just really dripping out when riding but getting blown back onto my boot and peg. After done riding maybe 2 small drips on floor and then it stops

[reddirtrider]

Thanks for the info, it is just really dripping out when riding but getting blown back onto my boot and peg. After done riding maybe 2 small drips on floor and then it stops

It isn't in backwards then.

I've replaced these seals but only during a rebuild with the cases split. The cases pinch them pretty good and I'm not sure you can simply pull them out and put another in without splitting the cases and not bugger up the seal. I've been wrong before though.