Z1OwnersClub GB

hello gents does anybody on here know how long it takes for the oil to get back down to the sump on a gpz 1100 mine takes several hours before you can see it on the sight glass. is this normal or could i have a blocked oil way. many thanks in advance john

John it don't work like that, there are no small oilways that the oil eventually works its way round, what we have is a big fuck off cam chain tunnel in the middle, that upon stopping the oil drops back to the sump, quickly, if you are waiting all night to see the level, probably on the side stand, its not worth waiting for, here is how it goes, stop the engine, wait a few seconds level it , look and see, NOTHING , ok pull it towards you, (stand up) some oil showing good, push it back to centre, if low just top it up to just below the high level,

remember now, there is big space for the hot oil to quickly settle to the correct level, there will always be more that settles overnight, but its not how its checked, check it quickly, after use, on full stand on level ground, wait no more than 5 or 10 secs if short, top up, and that's it, for sure the longer you wait some oil will drain back to the sump, from places like the cam reservoirs, between the clutch plates from the cam chain etc etc that's not what we are looking for, that's total capacity in a rebuilt engine . (minus filter), I have approached this from many angles, why cause I am bored, perhaps, but mainly to help those new to the mysteries of engines

Very thorough answer Ian

Especially at 2:20 in the morning

I had the same problem with a Z1000 MK2
The oil level would take ages to come back in the sight glass.
Gave the engine a good flush out with Wynns Engine Flush, took the sump off & cleaned out the sludge in the bottom + cleaned out the oil pump strainer.
Problem solved - oil level comes back in the sight glass very quickly now.

njwmct wrote:I had the same problem with a Z1000 MK2
The oil level would take ages to come back in the sight glass.
Gave the engine a good flush out with Wynns Engine Flush, took the sump off & cleaned out the sludge in the bottom + cleaned out the oil pump strainer.
Problem solved - oil level comes back in the sight glass very quickly now.

So it seems to me that if you have a dirty sump,oil pump filter ? that could cause the oil to settle slower when checking sight glass ? would that be right ?

Z1B / Ian - I like your style you would make a good teacher,
if not already

snotie1965 wrote:

njwmct wrote:I had the same problem with a Z1000 MK2
The oil level would take ages to come back in the sight glass.
Gave the engine a good flush out with Wynns Engine Flush, took the sump off & cleaned out the sludge in the bottom + cleaned out the oil pump strainer.
Problem solved - oil level comes back in the sight glass very quickly now.

So it seems to me that if you have a dirty sump,oil pump filter ? that could cause the oil to settle slower when checking sight glass ? would that be right ?

It seems to be the case, not really sure why - maybe it creates some sort vacuum that holds the oil back - all I know is that it's solved my problem.