Topic: Leaks from side covers?!? 75 Cb550F

[CarbasaurusRex]

Not sure why its leaking but they seem to be small orings. Anyone have a part number or ideas as to why??


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[jaytee-nz]

See the parts diagram on here - pages 2 and 3 (same part number for the CB550)
http://manuals.sohc4.net/cb500/service_manual/PL500K0_K1.pdf

[Scott S]

 Just went through this. There are only so many places. There's a crush washer (which really only sits on top of the head, which is sealed by on O-ring) and there are two O-rings where that end cap meets the valve cover.
 Remove that end cap and you can see the O-rings on it and the little 90 degree bracket that attaches it to the head. The crush washer is under that.

[bryanj]

The washer under the L bracket is supposed to be alluminimum and another waher under the bolt head. Reason it leaks is that is where the oil feed to the cam comes up from bottom end

[DaveBarbier]

Yes, the bracket holding the end cap has one crush washer on top and one below it.

[jonda500]

the o rings are part number: 91319-323-000 (o ring, 6x3)
the top washer is part number: 90425-300-000 (washer, 11mm)- a washer like the 6 under the cylinder cover screws
the bottom washer is part number: 90485-001-000 (washer, 6.5mm)- an aluminium crush washer

Mine started leaking slightly from under the crush washer - i tried flattening out the L bracket and annealing the washer but that made the leak worse. So I borrowed the bracket and crush washer from my 550 - still pissed oil out once hot. Then I simply cranked the bolt down just slightly tighter and now the leak is gone!!
John

[dave500]

i just use copper washers top and bottom.