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I know this is common with a two stroke but this is a little extreme. The bike has a brand new top end in it and the oil gas mix is which is usually what it should be I think.
I also believe the bike is jetted good. It also has a brand new silencer. So what else could be the problem? Any ideas would be much appreciated. James Staff member. May be time for a new top end.
kx 250 2 stroke oil from exhaust?
Or you may too fat on the jetting. Try running it at If that doesn't clear it up you need to lean the jetting out. If the top end is new, post up the jetting that is in there now and what is factory jetting. Lean it by jetting or back the air screw out some.
You have to be in the pipe hard not to get spooge. The harder I ride the less I have. I would drain and fill you trans case with the correct amount and then after a couple rides check it to make sure you have the same amount. For the average rider is more than sufficient.
Stewart or Carmichael that's another story. I agree with these guys that you should check out your jetting first though. It idles great.Exhaust header leak seal - Street legal 2 stroke KTM 300XCW
I ride the bike pretty hard so im a bit nervous about leaning the mixture.The Forum is a free service, and much like the "free" content on Public Radio, we hope you will support WoodenBoat by subscribing to this fabulous magazine. To get WoodenBoat delivered to your door or computer, mobile device of choice, etc, click WB Subscriptions.
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Join Date Sep Posts Oil coming out of two-stroke exhaust I started up my 90 hp Mercury OB on my Grady White yesterday for the first time this season.
Used a large garbage can and put it under the motor filled with water. Let it run for about 10 min to get up to temp. There was a nice stream of water coming out of weep hole the whole time and motor ran great.
After turning it off, I noticed a ring of black oil around the top of the garbage can that must have came out of the exhaust. I never noticed that before. Is that normal or do I have some sort of new engine problem? I thought it may just be all the fogging oil coming out that I sprayed in the cylinders last year but was not sure.
Afraid to run it any more unless I hear that this is normal. Re: Oil coming out of two-stroke exhaust I think that it is fairly normal. The oil is too heavy to burn. Were you using fresh mix, or old stuff? It really is quite difficult to build an ugly wooden boat. The power of the web: Anyone can post anything on the web The weakness of the web: Anyone can post anything on the web. Re: Oil coming out of two-stroke exhaust Whaddya' mean by "new engine" problem?
The oil is doubled up for break in period. Fogging oil is messy.All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply. Hottest Questions. Previously Viewed.
Unanswered Questions. Production Bike Racing. What is it when oil is coming out of exhaust on a 2 stroke bike? Wiki User Asked in Yamaha Motorcycles What is the difference between a 4stroke and a 2 stroke dirt bike?
Asked in Suzuki Motorcycles Why does your two stroke spit oil out the exhaust? Your bike is a 2 stroke. Because of that ti have no valves the in let nad outlet are ports. Asked in Yamaha Motorcycles Why does your yz spit oil from exhaust? That is the burnt two stroke oil. Two stroke Oil. Penzoil makes a good one. Asked in Head Gaskets and Valve Covers What if it is not a blown head gasket and you still have antifreeze coming out of the exhaust?
Asked in Fuel and Engines Can you run 4 stroke oil in a 2 stroke dirt bike motor? There is no difference in 4 stroke and 2 stroke oil, except that 2 stroke uses non-detergent oil. Oil with detergents will leave deposits in 2 stroke cylinders, and is not recommended.
Asked in Motorcycles, Yamaha Motorcycles, Motocross What kind of oil do you put in a 2 stroke dirt bike? Best to use two stroke oil. Mix it with the petrol, I guess you know this.All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply. Hottest Questions. Previously Viewed. Unanswered Questions. Suzuki Motorcycles. Why does your two stroke spit oil out the exhaust?
Wiki User That is the burnt two stroke oil. Asked in Yamaha Motorcycles What is the difference between a 4stroke and a 2 stroke dirt bike?
Asked in Technology Why oil is used in two stroke petrol engine instead of four stroke petrol engine? Where and how? Please give a guide and thank. The exhaust plays a great part on a 2 stroke than a 4 stroke. The exhaust system is the only thing that is scavenging the cylinder of the burn gases on a 2 stroke, verses the piston pushing most of the exhaust out on a 4 stroke. There is no oil to change in a two stroke engine. The lubricant is the oil that is mixed with the gas.
You can use four stroke oil for a very limited period in a two stroke engine in an emergency. However it is not formulated for two stroke engines and is not recommended.
Yes it is a two stroke But if u want to check the exhaust pipe is thin then it's a four stroke If it is thicker it's a two stroke. Asked in Suzuki Motorcycles, Yamaha Motorcycles, The Difference Between What is two advantages of a four stroke cycle engine over a two stroke cycle engine?By gropermanJuly 1, in Boating.
Gday guys, I flushed my boat the other day after not running it for about 5 weeks. Some smoke came out when i first started it and everything was ok. Then that night i looked at the engine and I could see black oil leaking from the back of the prop where it is attached to the shaft. Just wondering what everyones theory is of the problem? Could it be the seal shrunk because of the cold? Look forward to your answers Cheers!
How to Troubleshoot Two-Stroke Engines: Gas From Exhaust
My first suggestion is that you are a girl for not taking out the boat for five weeks. Naughty naughty. More seriously i had the same issue and i read about it everywhere to try and rectify it. I am fairly tight with my cash so if it could be fixed in house then i would have. Most people suggested to me that maybe i was running a mixture that was too rich in oil.
I was in the run in phase of a new motor so i put it down to that. I finished with the run in phase and the oil leakage seemed to stop. I dont even check anymore as the engine is still running smoothly, way over due for a service i might ad, so i am happy. There are a few on here like pelican and slinky that will have better advice. Huey would be able to help if its serious.
Did the engine run fine whilst you were flushing? Personally i wouldnt worry about it unless you are a greeny and worried about the extra pollution. If its 2 stroke residue you could try a better brand of oil that will burn off, Some cheap oils dont burn well and you can get residue.
Residue is not a big issue, so dont worry. Agreed, most likely residue that isn't burning off. I've found both my current and previous Johnsons 40hp then 50hp do it after flushing at idle, but never after a run. I have recently purchased a tinny with Johnson 25HP Forums New posts Search forums. Media New media New comments Search media. Resources Latest reviews Search resources. Log in Register. Search titles only. Search Advanced search…. New posts. Search forums. Log in. Register now!
Oil coming out of exhaust Cr So I know a little oil on the back of your silencer is normal i thinkbut I got my old cr back from a mechanic a couple days ago and i started it up that night and it was smoking alot and some oil was coming out the back.
So today after doing some stuff to it i drove it down the road for about 2 minutes. It wasnt smoking as much as the other day but when i came back oil pure black was dripping down my silencer onto my swingarm and brakes.
Seal in the engine? What did the mechanic do to the bike? Top end job? If not how old is the top end? Complete engine rebuild? No engine work? It sounds like a leaking seal, but more info needed. How hard do you ride the bike? How old is the fuel mixture in the tank? Is you carb working properly? Paw Paw. I wasnt riding it hard at all.
I bought a used, complete bottom end assembly off of ebay so I had him switch that out. Carb is running fine. Top end is fairly new. Ok, it needs to be run hard to run correctly, but I would be suspect of the complete changed bottom end. It could have a bad crankshaft seal on the clutch side and thus could be pulling oil from the trans into the combustion chamber. Did you service the carb while it was down? Was the fuel fresh? You gotta ring the piss out of it. Randog Leader. Babying it will make it "drool" but I suspect like PawPaw that the crank seal was not installed correctly or not even replaced.
Did he replace the seals and bearings?