19-12-13, 10:34 AM
I'm pretty sure those O rings don't exist on the FZS600. The cylinder base gasket shown as item 4 in section 4-25 is also the wrong shape. Ours is a much more open gasket to match the crankcase face and that O ring would have nothing to locate it or to sit against on the crankcase side.
I suspect (i.e. just guessing) what has happened is that when preparing the the manual they have used another similar manual as a basis, possibly the Thundercat manual. This would be normal practice in industry and unfortunately errors sometimes creep in.
The O ring is probably used on an engine with separate cylinder liners and may be intended to stop oil creeping between the liner and cylinder block. The FZS600 has the bores plated direct onto the block (i.e Nicosil) so no use for an O ring.
I'm afraid it's back to the piston rings or the other options mentioned.
I suspect (i.e. just guessing) what has happened is that when preparing the the manual they have used another similar manual as a basis, possibly the Thundercat manual. This would be normal practice in industry and unfortunately errors sometimes creep in.
The O ring is probably used on an engine with separate cylinder liners and may be intended to stop oil creeping between the liner and cylinder block. The FZS600 has the bores plated direct onto the block (i.e Nicosil) so no use for an O ring.
I'm afraid it's back to the piston rings or the other options mentioned.