'O' rings at cylinder base 500cc twin

Jeremy Wilton

Jeremy Wilton

Junior member
Location
Cropredy
Whilst dismantling the 500cc twin there are 4 O rings on the outer most studs at the cylinder base - above the gasket - they are not on the workshop diagram - but have found 4 in a  replacement top end gasket set I have got. Should I place them on the studs when I rebuild?
Cheers
Jez
 
all i can say is that looking at figure 69 in the workshop manual, it visually appears that no O ring is fitted to the outermost 4 studs when fitting the base gasket. Furthermore no mention is made of using O rings in the text. Of course, the manual doesn't mention or show the four O rings (part  #55 130 019)  that are present in the parts manual associated with the head gasket (part #55 120 091). Most unhelpful.
 
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