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Oil Level

 
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kenmoore



Joined: 22 Apr 2016
Posts: 159
Location: Australia

PostPosted: Tue Aug 09, 2016 12:06 pm    Post subject: Oil Level Reply with quote

The Db1 that I have been working on has a 90 900 SS motor fitted to it and the oil sight glass has two lines on it.

The bottom one says Max where you would expect Min !

Can anyone on here shed some light on this ?

I am concerned and fear that the Valve Stem Seals are shot because this thing smokes like a NY Crack Addict !

1/2 a litre of oil for 500 Klms, is that acceptable for this engine?

Have checked compression, both cylinders 134!

Suggestions please.
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Evilchicken0



Joined: 12 May 2010
Posts: 2615
Location: London

PostPosted: Tue Aug 09, 2016 1:01 pm    Post subject: Reply with quote

Have you done a wet compression test ??? If the comp rises after you add oil in the bores then it's the rings that a shot. Valve seals smoke on start up but then clear, either way though it sounds like a top end rebuild.
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vort28



Joined: 22 Mar 2010
Posts: 1691
Location: Northwest , UK

PostPosted: Tue Aug 09, 2016 5:26 pm    Post subject: Reply with quote

Picture of the sight glass on my DB4 900ss motor.



Sounds like the MAX should be the MIN on yours.

1/2ltr of oil in 500km is way to much, don't remember having to top up any Duc engine much between 4000mile services.
Something not quite right there as 134psi seems a little on the low side and smoking is also not something I have suffered with on Duc air cooled motors.
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kenmoore



Joined: 22 Apr 2016
Posts: 159
Location: Australia

PostPosted: Tue Aug 09, 2016 9:41 pm    Post subject: Reply with quote

Oh Shoot,

Looks like an engine out jobby.

Now to get an engine manual.

I have done engines before, however I was hopeing not to have to do this one.
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kenmoore



Joined: 22 Apr 2016
Posts: 159
Location: Australia

PostPosted: Wed Aug 10, 2016 12:11 pm    Post subject: Reply with quote

Got manual thanks.

Next week bike returns to the Man Cave and engine out !

Stay tuned for pics and any advice offered along the way will be taken in the vein intended.

Cheers from Down Under
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2bims



Joined: 03 Apr 2010
Posts: 4402

PostPosted: Wed Aug 10, 2016 2:01 pm    Post subject: Reply with quote

Best of luck Ken.....at least it should be sorted after all the other things you've done.........You'll probably find that engine out means everything off....what with rear swinger attached to engine and frame with shock etc etc.....thats why when I dropped my DB2 engine I thought what the heck...go the whole hog and strip and restore, new powder coat to frame, swinger etc etc.......on the home straight with mine now....engine in and running....just a couple of niggles to go and back on the road.........
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kenmoore



Joined: 22 Apr 2016
Posts: 159
Location: Australia

PostPosted: Wed Aug 10, 2016 9:47 pm    Post subject: Reply with quote

The plan was too get it going properly and enjoy it for a year or so then do a resto

Will do a couple of other things now .

Bloody disappointed at this but we just want it right as it's too good a bike to leave like this.
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