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Old 11-02-2017, 10:23 PM   #28
Dukedesmo
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Join Date: Sep 2010
Location: Leics
Bike: M900
Posts: 2,844
Quote:
Originally Posted by Davy View Post
The base gasket? Is that the metal shim you talked about? should I coat both sides of it then bolt the head down on that? Or just seat it as you said.
The oil gallery plug. Is it best looking for it through the horizontal/bottom cylinder at the crank, which side is it on right/left?
Yes the shim, if it's still good (not kinked) then re-use with a thin coating of threebond on both sides (better than the hard red stuff they used back when it was built) but make sure you don't block the small oil feed hole that passes through on the RH side of the cylinders.

As for the oil plug, you should just be able to see it (or the hole it's in) on the left side of the crank, through the vertical cylinder hole.

Here's what it looks like, the big screw in the side of the crank;



Obviously you won't see it like that, in fact you might not be able to see it, only the hole it sits in and that's a good thing because if it works it's way out so that it's protruding from the crank (and rubbing on the bearings) then you have a problem but if it's flush or under then it's fine. From what I've heard if they haven't come out by a certain mileage then they won't.

This is how it should look (under the grubscrew);



You'll almost certainly be OK but you wouldn't want to put it back together if it's backing out because the engine won't last long if it does.

Also clean up the head to cylinder faces as much as possible where they meet because there are no gaskets so you want a nice fit, you can use a bit of fine valve grinding paste and 'wiggle' the head back and forth as much as it will to 'polish' the faces (clean off afterwards) so you have as good a chance as possible (with all new 'O' rings) of a leak-free head.
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