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Welcome to the new B.I.R.D. Forum. Please be sure to read the "New Member / New Registered ? Please Read" thread in the Coffee Shop. This contains some important information. To become a full member ( £5.90 a year ) simply click on your user name near the top on the right I hope you enjoy the new site ................ Jaws ( John )
I will bow to the greater knowledge of others on here, but as the plugs look fine does that not suggest that it is not a case of oil burning in one or more cylinders? I would have thought one or more plug would be black if that were the case? Also why would it just happen on overrun if it were a valve or similar cylinder related problem?
Just thinking out loud here; what else could be happening to make the thing chuck out black smoke on overrun?
ECU messing up the fuel mixture? sticky injector? Can the ECU be swapped from another bike to eliminate?? :dunno:
There is going to be an answer to this!!
Just thinking out loud here; what else could be happening to make the thing chuck out black smoke on overrun?
ECU messing up the fuel mixture? sticky injector? Can the ECU be swapped from another bike to eliminate?? :dunno:
There is going to be an answer to this!!
I'm not arguing mate as I don't know the answer:-0). But if oil burning in bore(s) surely the plug(s) would be fouled up?
I just think there is no actual evidence that this a bore related problem - something that is as rare as hens teeth on a Bird.
While I don't suppose this is the answer, using the 'blue smoke = burning oil' thinking (which makes sense) then is there another way oil could be burnt, such a dripping on the exhaust system? ~Is there anything that might cause this when the bike is going downhill as seems to be the issue here?
Just trying to widen the debate to see if there are any other potential areas to be looked at?:dunno:
Wolfie
Is a lunp
+ it wont use 1 litre of feckin oil if it was too much fuel.
How about some positive input Foxy??:-0)
It might use 1l of oil if it is coming out of the motor somewhere and dripping on the exhaust?
I really don't tknow the answer here, just hoping to stop everyone fixating on what might be the cause ie a bore issue when the plugs are clean, suggesting it might not be a bore issue??
At this time of year I am always suspicious of any reports of smoke
It is very easy to mistake vapour for something nasty.. but then you are using a litre of oil a day so quite obviously something fairly nasty IS going on.
rest assured the Honda dealer you gave the bike to, to have them do a valve check will not have caused the problem.. The reason I am fairly confident about this is that knowing the average Honda dealer the rocker box will have had a REALLY good wipe around and not a lot else.. so yep.. fairly safe there then
The only real clues we have are that you were it happens on the over run and you have a K and N fitted
Whilst all other answers are quite possibly right, there is a fly in the ointment.. The fact it does not happen in normal use
I have a distinct feeling it could be nothing worse than a blocked up engine breather or similar..
That is where I would check to start with ( and also make sure that neither of the reed valves under the covers on the rocker box, and that the air suction valve is working and clear )
It is very easy to mistake vapour for something nasty.. but then you are using a litre of oil a day so quite obviously something fairly nasty IS going on.
rest assured the Honda dealer you gave the bike to, to have them do a valve check will not have caused the problem.. The reason I am fairly confident about this is that knowing the average Honda dealer the rocker box will have had a REALLY good wipe around and not a lot else.. so yep.. fairly safe there then
The only real clues we have are that you were it happens on the over run and you have a K and N fitted
Whilst all other answers are quite possibly right, there is a fly in the ointment.. The fact it does not happen in normal use
I have a distinct feeling it could be nothing worse than a blocked up engine breather or similar..
That is where I would check to start with ( and also make sure that neither of the reed valves under the covers on the rocker box, and that the air suction valve is working and clear )
At this time of year I am always suspicious of any reports of smoke
It is very easy to mistake vapour for something nasty.. but then you are using a litre of oil a day so quite obviously something fairly nasty IS going on.
rest assured the Honda dealer you gave the bike to, to have them do a valve check will not have caused the problem.. The reason I am fairly confident about this is that knowing the average Honda dealer the rocker box will have had a REALLY good wipe around and not a lot else.. so yep.. fairly safe there then
The only real clues we have are that you were it happens on the over run and you have a K and N fitted
Whilst all other answers are quite possibly right, there is a fly in the ointment.. The fact it does not happen in normal use
I have a distinct feeling it could be nothing worse than a blocked up engine breather or similar..
That is where I would check to start with ( and also make sure that neither of the reed valves under the covers on the rocker box, and that the air suction valve is working and clear )
Thank you John. I still think a run across to Thetford from Watford would be a good idea.........................................and I bet it turns out to be something pretty straightforward as well:-0)
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L
loosedougie
Guest
Next fine weekend then, will pull the bike apart again, but this time at running temp and open throttle for compression test.
The plugs are clean cause it doesn't burn oil on the flats and has had time to burn off. When I started the bike after putting the oil down the bore that did not smoke as much as it did down the Italian mountains. It was 1 litre of oil in one day, at the end of the day, no oil showed on the stick. Start of the day it showed as full.
Two mechanics have checked the breather hoses and the reed valves, and are fine. I think I have said eariler that the airbox is clear as well.
Will try to find a hill somewhere and get the wife at the bottom of it with a camera to get a photo of it smoking,unless the OEM filter has sorted it.
It is coming out of the pipes.
Will keep you posted
The plugs are clean cause it doesn't burn oil on the flats and has had time to burn off. When I started the bike after putting the oil down the bore that did not smoke as much as it did down the Italian mountains. It was 1 litre of oil in one day, at the end of the day, no oil showed on the stick. Start of the day it showed as full.
Two mechanics have checked the breather hoses and the reed valves, and are fine. I think I have said eariler that the airbox is clear as well.
Will try to find a hill somewhere and get the wife at the bottom of it with a camera to get a photo of it smoking,unless the OEM filter has sorted it.
It is coming out of the pipes.
Will keep you posted
Wolfie
Is a lunp
+ it wont use 1 litre of feckin oil if it was too much fuel. what is negative about that?
shall we guess loose oil filter, cracked sump high up on the front end? clutch cover not seated right high up?
does it smoke at a standside facing down hill, is the smoke def. from the exhausts? or is it infact from the middle of the bike.
or course we could just all guess.
that's better Foxy:-0)
All I am saying is that if the plugs aren't fouled why is everyone fixated on oil in the bores? And if it is oil in the bores why would it only happen when going downhill? Doesn't make sense to me:dunno:. Therefore logic says it is something else.
But, then again, what do I know. I am the man who can change a bird oil filter in 11 minutes. Then do it again as I left two airbox screws out.:wank:
Hope the guy finds the problem soon and let's hope it is an easy fix.
What were you doing in the airbox to change the oil filter ?
Wolfie
Is a lunp
prehaps he goes in from the top???
oil filter = 2 mins, hand up the inside, grab and twist.
air filter = yer about the 10-15 min mark.
washing and polishing = about the 3 min mark if the mirrors are dirty. dont worry about the rest.
gypsy
MAN on the PAN
Fixed for ya Andy !:yo:
Wolfie
Is a lunp
stop fucking around in the help section.
Oh no, can't believe I said that.......:violin:
Oil filter takes about 2 minutes once oil drained, unless you want to fanny around removing panels of course......
trying to dig my way out, but it's not working, is it........:shooter:
well, you started it:neenaw:
Anyway, being professionals, let's get this thread back onto sorting the original problem; needs to be sorted so all behave!!
gypsy
MAN on the PAN
Go boil your head man8um
Wolfie
Is a lunp
so it looks like yours??? feck off.