Small oil leak, advice needed!

[stacks99]

Hey guys, new to the forum and a new 75 xs650B owner, first bike so bear with me! Bike has a small oil leak which original owner did tell me about he thinks there is a small piece missing. I attached two photos of where the oil is leaking from, it is coming out of the small "nozzle" that is sticking out there between the cylinders, not a bad leak but just thought if there is only a small piece missing i can replace it. The end of that piece is open but i do not feel any threads that would indicate a bolt should be in there, maybe a rubber piece? I dont know. Any advice is appreciated, again i'm a new bike owner so thanks for your patience.

 

[alfredo]

Welcome to the forum!

From what it looks like, you are talking about the cam chain tensioner. Could be an O-ring, but others will chime in with more information on that specific year.

Here is a diagram of years and you can see the O-rings in rubber and cork.

 

[5twins]

I think the cover nut is broken. There should be a hex head on the top to tighten it with. Looks like yours broke off.

 

[xjwmx]

You can go to babbittsonline.com or other dealer sites and look at a parts fiche to see what should be there and perhaps order. In the meantime if just the hex head broke off, maybe you can tighten it with a pipe wrench

 

[TeeCat]

Yes, your dome nut (cover) is broken. Perhaps someone here has one they'll part with.

And welcome!

TC

 

[XSLeo]

I have a 75. My PM, Previos Moron, had a cobbed up oil pressure sending unit/big nut for a cover. I replaced it with a set up from an 82 engine I got for parts.
If you remove the cover and look you will see an o-ring. If you take the o-ring to the parts store they might have an o-ring that size. It's 39x33x2.5 mm
Mike's XS has them for $2.20 Item #18-0868
At Mike's click engines, then gaskets and seals, scroll down and it shows the differences in the cam chain adjusters. The 75 B model used the type C adjuster. Or look in Alfredo's post, he's got the pics and descriptions.
Leo

 

[XSLeo]

You guys are right, I missed that, his cover is broken.
Leo

 

[stacks99]

Thanks for all the information, now that i know what it is I can start looking around for a new piece! So this is not anything serious then? oil leakage is quite minimal

 

[xjwmx]

^If it's leaking cause it's loose it's liable to get maximal at any time I would say The cap thing is full of oil. If leaking due to o-ring, maybe less bad. Easy to fix at any rate; just get a good cap and o-ring. Adjust the cam chain while you're at it.