Robert 65 Posted April 30, 2020 Report Share Posted April 30, 2020 Hello I was having oil coming out of the exhaust. I've changed the crankshaft seals No improvement Petrol/oil ratio not the problem Any thoughts Quote Link to comment Share on other sites More sharing options...
rotors7 Posted April 30, 2020 Report Share Posted April 30, 2020 (edited) On 4/30/2020 at 4:13 PM, Robert 65 said: Hello I was having oil coming out of the exhaust. I've changed the crankshaft seals No improvement Petrol/oil ratio not the problem Any thoughts Expand Perhaps the silencers are that clogged up with oil ? Edited April 30, 2020 by rotors7 Quote Link to comment Share on other sites More sharing options...
Robert 65 Posted April 30, 2020 Author Report Share Posted April 30, 2020 Evening Many thanks for your information. How do I remove the obstruction? Is it carbon the obstruction? Once again thank you. Stay safe and well. Quote Link to comment Share on other sites More sharing options...
teamferret Posted May 1, 2020 Report Share Posted May 1, 2020 Take it for a long ride or burn out the excess oil with a blow torch 1 Quote Link to comment Share on other sites More sharing options...
feetupfun Posted May 1, 2020 Report Share Posted May 1, 2020 The oil you see is probably condensed vapour/smoke from the combustion process. Modern two-stroke oils can be so good at resisting burning that they can cause what you are seeing. Once the sound absorbtion material in the exhaust is fully wet with this oil and it can't hold any more, it will start coming out wherever it can. It really doesn't do anything except make a mess so if you can manage the mess then you don't have to do anything. If you rode the bike hard enough the exhaust may get hot enough to stop the oil condensing inside the exhaust. Also if you ride it hard enough with oil already in there, it may clean it out to some degree. If you decide to clean out the exhaust by taking it off (it can be cleaned out a few ways when off the bike) but still continue to ride in the same manner, it will continue to fill up with oil. I've seen bikes with a drain line at the low point and when the bike is parked, they put a container under the drain line to catch what comes out. Quote Link to comment Share on other sites More sharing options...
b40rt Posted May 1, 2020 Report Share Posted May 1, 2020 What ratio are you running, anything over 50:1 will exaggerate the problem. Quote Link to comment Share on other sites More sharing options...
misscrabstick Posted May 1, 2020 Report Share Posted May 1, 2020 I have had two strokes do this, remove exhaust, tip it out. It builds up over time, I used to find after riding my TY 250 on the road at higher speeds the oil in the system would get really hot and smoke like crazy even for a while after turning off the motor. Quote Link to comment Share on other sites More sharing options...
Robert 65 Posted May 2, 2020 Author Report Share Posted May 2, 2020 Hello Many thanks for your email. Thank you. Quote Link to comment Share on other sites More sharing options...
Robert 65 Posted May 2, 2020 Author Report Share Posted May 2, 2020 On 5/1/2020 at 9:46 AM, feetupfun said: The oil you see is probably condensed vapour/smoke from the combustion process. Modern two-stroke oils can be so good at resisting burning that they can cause what you are seeing. Once the sound absorbtion material in the exhaust is fully wet with this oil and it can't hold any more, it will start coming out wherever it can. It really doesn't do anything except make a mess so if you can manage the mess then you don't have to do anything. If you rode the bike hard enough the exhaust may get hot enough to stop the oil condensing inside the exhaust. Also if you ride it hard enough with oil already in there, it may clean it out to some degree. If you decide to clean out the exhaust by taking it off (it can be cleaned out a few ways when off the bike) but still continue to ride in the same manner, it will continue to fill up with oil. I've seen bikes with a drain line at the low point and when the bike is parked, they put a container under the drain line to catch what comes out. Expand Morning Many thanks for your reply. Feel much better reading this. It's been stood in garage for years Has mentioned I changed the crankshaft seals that were rock hard. New oil,plug, points etc Started straight away. I'm running 30 to 1 What oil should I add to the petrol,? Best regards Quote Link to comment Share on other sites More sharing options...
Robert 65 Posted May 2, 2020 Author Report Share Posted May 2, 2020 On 5/1/2020 at 9:50 AM, b40rt said: What ratio are you running, anything over 50:1 will exaggerate the problem. Expand Running 25 to 1 What oil should I add to the oil Quote Link to comment Share on other sites More sharing options...
Robert 65 Posted May 2, 2020 Author Report Share Posted May 2, 2020 On 5/1/2020 at 9:46 AM, feetupfun said: The oil you see is probably condensed vapour/smoke from the combustion process. Modern two-stroke oils can be so good at resisting burning that they can cause what you are seeing. Once the sound absorbtion material in the exhaust is fully wet with this oil and it can't hold any more, it will start coming out wherever it can. It really doesn't do anything except make a mess so if you can manage the mess then you don't have to do anything. If you rode the bike hard enough the exhaust may get hot enough to stop the oil condensing inside the exhaust. Also if you ride it hard enough with oil already in there, it may clean it out to some degree. If you decide to clean out the exhaust by taking it off (it can be cleaned out a few ways when off the bike) but still continue to ride in the same manner, it will continue to fill up with oil. I've seen bikes with a drain line at the low point and when the bike is parked, they put a container under the drain line to catch what comes out. Expand Thank you for your reply Never had this running before Owned for years Feel happier now Thank you Quote Link to comment Share on other sites More sharing options...
Robert 65 Posted May 2, 2020 Author Report Share Posted May 2, 2020 On 5/2/2020 at 6:20 AM, Robert 65 said: Running 25 to 1 What oil should I add to the oil Expand What oil should I add to the petrol Quote Link to comment Share on other sites More sharing options...
Robert 65 Posted May 2, 2020 Author Report Share Posted May 2, 2020 On 5/1/2020 at 9:50 AM, b40rt said: What ratio are you running, anything over 50:1 will exaggerate the problem. Expand 25 to 1 what oil should I add to the petrol Quote Link to comment Share on other sites More sharing options...
b40rt Posted May 2, 2020 Report Share Posted May 2, 2020 (edited) On 5/2/2020 at 6:30 AM, Robert 65 said: 25 to 1 what oil should I add to the petrol Expand I'd run it at 50:1, 100ml to 5 litres of petrol using a quality semi synthetic 2 stroke oil. Even at this reduced rates it will smoke and build up in the crankcase and exhaust. As said above, it needs decent run to get some heat into it to burn off excess, or cleaned out and repacked if this isn't possible. Edited May 2, 2020 by b40rt 1 Quote Link to comment Share on other sites More sharing options...
Robert 65 Posted May 2, 2020 Author Report Share Posted May 2, 2020 Morning Thank you for your reply. Will try it later on today. Much appreciated Rob 1 Quote Link to comment Share on other sites More sharing options...
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