Oil Leak

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Artb

XS650 Enthusiast
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I’ve either got small leak (2 drops in a week) but a leak nevertheless at either left crankcase cover gasket,the starter motor cover gasket or the countershaft drive sprocket seal
Brakecleaned whole underside area and will ride soon and inspect,if it’s the sprocket start seal is it possible to pull it out and replace without case splitting?
Otherwise just gaskets at one or the other area,can’t tolerate oil leaks it’s not a British bike!
TIA
 
Given your intolerance for oil drips, I'm sure that we will keep you very busy over the next couple of months.
If you don't want to wait for the flood of responses, just search for "oil leak" and "oil seal" at this forum. Get the coffee pot going, as you'll be up all night reviewing hundreds of informative threads.
Hope you find the leak(s). They're not difficult, but time consuming to chase down.
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There are Info to find on the links
As Gary Points out the nut must be tightened # 2
As a suggestion I would clean the rear wheel + not lubricate the chain.
And drive a while ..to see if the rear wheel gets oily .
A quick check of the other bolts to the right torque
 
Another note:
A slight drip like you mention can be just a "weep" of a gasket or seal. Or a combination of two or three gaskets and seals.
A slight leak can be evident just in the springtime, and disappear later in the season.
And it can be evident only under aggressive driving.

A slight leak or weep does not necessarily mean that it is going to become worse over the course of a year.
It might simply stay the same; I have four XS650's on the road and I speak from my own experience (evidence).

So, you might consider just placing a piece of cardboard under that spot of the bike.


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You guys are the best Probably push rod seal and I’ll order 1 maybe 2!!
Is the left crankcase cover usually trashed on removal of cover or should I buy one also?
 
The gasket can get pretty beat up but it's not an oil or water seal so doesn't have to be pretty. The thickness does affect clutch setting, action.
Under LH cover.JPG
 
Look for an area that flowing oil has washed clean, prob. under the push rod seal. As 4G mentioned if the sprocket is loose it somehow makes it leak from the countershaft seal under it. It does work loose and creates a dangerous situation. 36 meetamiller if I remember righ.
 
If the pushrod seal is clearly leaking significantly, check the side to side slop or wear of the pushrod bearing behind the seal. Might as well replace that while you're at it. MikesXS website has a good bearing replacement how-to.
 
Yes, it's a bushing, and most I've encountered need replacing. The stock one is 8mm long. Usual replacement we use is 10mm long but I've started using even longer 12mm ones. See post #64 here .....

http://www.xs650.com/threads/200-special.51454/page-4

Using the long one piece pushrod also seems to make sealing easier.

You may get an occasional drip not from any oil leak but just from accumulated chain lube scraped off the chain by the shift shaft guard. I try to get under this cover every year, usually in the Spring, and give it a "Spring cleaning". Since I changed all the seals in there, this is usually what I'm presented with, mostly chain lube fling-off. You can see the slight chain lube dripping I mentioned .....

lvGuHOe.jpg


Something else I always seemed to find was the oil streaks on the sprocket emanating from the nut. This seems to indicate a little bit of oil is getting out there. I installed the nut pretty tight, about 72 ft/lbs if I recall, but maybe that's not quite enough. Studying the various manuals, early ones spec this nut as tight as 95 ft/lbs. So, last season I did that, tightened it up more to 95 ft/lbs. It wasn't loose but it did turn a little more to get that value. It will be interesting to see if this eliminated the oil streaking this year when I check it.
 
5twins said:
Yes, it's a bushing, and most I've encountered need replacing. The stock one is 8mm long. Usual replacement we use is 10mm long but I've started using even longer 12mm ones. See post #64 here .....

http://www.xs650.com/threads/200-special.51454/page-4

Using the long one piece pushrod also seems to make sealing easier.

You may get an occasional drip not from any oil leak but just from accumulated chain lube scraped off the chain by the shift shaft guard. I try to get under this cover every year, usually in the Spring, and give it a "Spring cleaning". Since I changed all the seals in there, this is usually what I'm presented with, mostly chain lube fling-off. You can see the slight chain lube dripping I mentioned .....

lvGuHOe.jpg


Something else I always seemed to find was the oil streaks on the sprocket emanating from the nut. This seems to indicate a little bit of oil is getting out there. I installed the nut pretty tight, about 72 ft/lbs if I recall, but maybe that's not quite enough. Studying the various manuals, early ones spec this nut as tight as 95 ft/lbs. So, last season I did that, tightened it up more to 95 ft/lbs. It wasn't loose but it did turn a little more to get that value. It will be interesting to see if this eliminated the oil streaking this year when I check it.
Click to expand...
Those chain links appear to be on the kinky side....
 

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