St1100 blowing white smoke
- Thread starter Alfst1100
- Start date
OK, found the thread:
Christopher (misterguitar) hasn’t been on the forum for over a year now so don’t know how it all worked out. I suspect that he was successful though based on his responses.Questions regarding breather connections and transmission case covers | ST1100 Related
I bought a 93 ST100 and have been trying to sort out the breather/emissions connections. So it would seem there are two versions of the transmission case on these bikes? One that has a hose connector in the main housing and one that is cast with no connector. And there is also a connector on the...www.st-owners.com
HTH, John
Ho John I still cant seem to find where the lower hose on the breather tank goes. I've attached the hoses to where they are going to for the picture. From your previous picture it looks like the braided hose is going to the bottom of the breather box or is the 2 braided hoses
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John OoSTerhuis
Life Is Good!
Alf, the small hose leads from the breather box to the nipple on the bottom right underside of the air cleaner case/box. The large smooth hose leads to the upper rear nipple on the rear case (see my picture in post #3). The large braided hose leads to the nipple on the bottom of the shift cover. In this picture that Christopher posted in the linked thread I posted above (post #5) we identified his problem: he had a ‘91 engine without the external crankcase breather system installed! The picture shows the later model rear case cover that he also had, w/o the upper breather port. It also shows the ‘91 shift cover with breather port.
Edit: Does your shift cover have the breather port on it?
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UPDATE WHITE SMOKE SOLVED
Hi. Thanks to John I have got all my breather hoses in the correct places. As for the white smoke, after a few days checking the bike over I ran the bike without the silencers. To my surprise it was no longer blowing smoke I cut the one of the silencers open to find all the baffle holes were clogged with carbon. After heating the inside up lots of white smoke began to come out. It turned out to be slowly burning the carbon build up. And the exhaust fumes blowing the embers made the carbon hotter hense more smoke with revs. I have since fitted some cheap silencers which will be fine for the time being. Thanks for the help. I hope this could help someone else
Hi. Thanks to John I have got all my breather hoses in the correct places. As for the white smoke, after a few days checking the bike over I ran the bike without the silencers. To my surprise it was no longer blowing smoke I cut the one of the silencers open to find all the baffle holes were clogged with carbon. After heating the inside up lots of white smoke began to come out. It turned out to be slowly burning the carbon build up. And the exhaust fumes blowing the embers made the carbon hotter hense more smoke with revs. I have since fitted some cheap silencers which will be fine for the time being. Thanks for the help. I hope this could help someone else
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I think it was condensation from the engine breather hoses being wrong one also had a air compressor attachment screwed into it for some reason. The oil wasnt milky as such more thin, the bike was stood a long time outside. I've changed the oil and it looks fine now so time will tell I'll check it again in a week after some riding...
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Oil being thin and smelling of gasoline was most likely caused by a stuck float. The carbon in the exhaust baffles was likely due to an overfull crankcase causing the oil fuel mixture to be sucked into the exhaust system and when it gets hot, it will cause white smoke.