Bike Smoking when coming off revs, Rider behind said smells very rich after new

[Hooli]

I still think it might be worth taking the crankcase filter off the engine & checking it's clear.

I know you've checked the pipe to the airbox, but the black box thing on top of the gearbox has a metal mesh filter in it. If that's blocked you won't get any oil in the airbox but you will get high crankcase pressure which can force oil past the rings on the overrun when cylinder pressures are lowest.

Just putting a longer pipe on it & blowing down it might be enough to check. Or run the bike with it like that & you should feel air pulsing in & out of it if it's clear.

[Barbastro K6]

also. Yessssss

[Xdiavel]

I still think it might be worth taking the crankcase filter off the engine & checking it's clear.

I know you've checked the pipe to the airbox, but the black box thing on top of the gearbox has a metal mesh filter in it. If that's blocked you won't get any oil in the airbox but you will get high crankcase pressure which can force oil past the rings on the overrun when cylinder pressures are lowest.

Just putting a longer pipe on it & blowing down it might be enough to check. Or run the bike with it like that & you should feel air pulsing in & out of it if it's clear.

Thanks all,

Some very good ideas floating around. I was wondering about that Hooli. The thing that throws me is if the rings were worn which I cannot believe at 9k mls but as we all know on 23 yr old machines we never know how they have been treated, ( Bad run it etc)  Could well have stuck rings but as the pic I posted shows the cylinders look like new and could see cross hatching when I last looked.
But I would expect to see Blow-by out of the PCV pipe but it is spotlessly clean. I had the sump off it last year too and it all looks brand new inside from underneath.

That does give me some things to try though before ripping it apart and doing the rings. So thanks all

Kind Regards

[Xdiavel]

Ok,

Tested the PVC pipe and that seems fine, didn't have the right size hose but found a pipe that fitted into the oil fill hole and blew into the crankcase and could feel/hear it lightly out of the hose.

Also ran the bike for a minute with the pipe off and could feel light air blowing against my finger. No smoke/No high pressure blowing.

[Hooli]

I'd be very surprised at rings with only 9k on too, especially as you can still see cross hatching so we know it's not glazed the bores.

[Xdiavel]

I'd be very surprised at rings with only 9k on too, especially as you can still see cross hatching so we know it's not glazed the bores.

Well here is a quick little video of it doing it, Cannot record too much as the Neighbours must really hate me right now. PCV pipe off at this time and engine very hot although gauge reads 10deg over by the look of things.

https://www.youtube.com/shorts/Tkx7FgVdKvw

It does nothing until the gauge hits 80 deg then this starts.

[Will14]

Probably not the case but whats the history of the bike, you mention no power commander, could a previous owner have had the ECU flashed & it is causing over fueling at higher temps as has been mentioned previously? depending on what ECU you have fitted (some have one big plug others have two different size plugs) I have a spare ECU off a K2 that I would be willing to post to you depending where you are to rule an ECU fault out if that helps. All I would ask is that you post it back to me once tested

Cheers, Pete

[grog]

XDiavel, found this old thread, pretty much what youre saying. I watched your video, thought then really must be rings.Rollerfish was person. His thread worth reading. Was a few bits about honing or not to hone, interesting stuff.

[Hooli]

If you do look for rings, I've noticed a lot of engine parts are massively reduced from Suzuki. These old girls must have got to the age they don't want to stock things for them anymore.

[Xdiavel]

XDiavel, found this old thread, pretty much what youre saying. I watched your video, thought then really must be rings.Rollerfish was person. His thread worth reading. Was a few bits about honing or not to hone, interesting stuff.

Hi Grog,

Funny enough I found that last night and had a read and yes seem to be exactly what is happening to mine albeit his was high milage so would sort of expect it to a degree but 9k mls seems crazy on mine unless it has a oil rings stuck etc after sitting around for years doing hardly any miles. At this stage and the amount of time I have spent chasing this issue I think I am just going to have to bite the bullet and do the rings.

I think the biggest issue will be sourcing the smaller stuff like head bolts Or how much I could get away with reusing if needs be.

[Xdiavel]

Probably not the case but whats the history of the bike, you mention no power commander, could a previous owner have had the ECU flashed & it is causing over fueling at higher temps as has been mentioned previously? depending on what ECU you have fitted (some have one big plug others have two different size plugs) I have a spare ECU off a K2 that I would be willing to post to you depending where you are to rule an ECU fault out if that helps. All I would ask is that you post it back to me once tested

Cheers, Pete

Hi Will,

That is amazingly kind of you, Thank you. I don't think I will try that just on the basis I believe I am seeing Oil on top of the cylinder (picture I posted earlier in the thread on the left side of the piston) And feel the smoke is more burnt oil than Fuel at this stage sadly.

I have no idea how this has even happened but feel I have been stitched up. I have done nothing but work on this bike trying to figure this issue out all the time I have owned it. I have too much money and time invested in it now to sell it and will not pass this issue on to somebody else to deal with as it goes against what I stand for.

I go away on Holiday in a week so will start stripping it down to the pistons when I return and try sourcing the parts I will need. As it's only a weekend toy there is no urgency so can try to enjoy it. If that is even a thing working on bikes 

But at least I can say I did it if all goes well and will have an as new bike at the end of it I can run in properly and start a fresh. After than if it still does it then I am truly at a loss :-(

[Hooli]

Double check the manual but I believe you shouldn't hone the bores on these. The ceramic coating is too thin to take it.

[grog]

I just knew this would get back to hone or not. There was never a decision in earlier threads. Suzuki say no, others say yes. Steve Porter used to be on here, worth a look at his opinion, he honed composite Ducati with the old toilet brush hone.

[KiwiCol]

Eric, try the Italian tune up first, if you're gonna do the rings any way, why not?    I could say, ya just might get lucky, but you've proved that's another bloke.

[Hooli]

Whatever happened to Lucky13? he was always about on the old Org.