MacRohard
18.05.2021 19:30:07
Definitely not normal. 32:1 is a good mixture so it's not that. What ratio was ran before you rebuilt it? Is it possible the oil was in there before the rebuild? more
See full version: Oil coming out pipe 2 stroke
Definitely not normal. 32:1 is a good mixture so it's not that. What ratio was ran before you rebuilt it? Is it possible the oil was in there before the rebuild? more
Posts: 1102
Is it premix or engine oil?
z71will wrote: I'm not sure if this is normal or not but I have a Honda cr125 that I'm working on and when I took the pipe off there was black oil that came out the pipe and exhaust flange. Not a lot but I'd say maybe a cup or half a cup? I had only ran it for a total of 20 minutes after the rebuild. I didn't see any oil shooting out the back when it was running. I run a 32:1 oil ratio.
Have you had any recent changes in the way your tranny sounds or shifts? It's also possible you have lost a tooth or two on one of the gears and it has popped a hole in the case while it was circulating in the oil - I have seen this happen quite a few times and it was a relatively common problem with Yamis from about 1998-2001. Apparently, they were having heat treating/material issues with their gears and shift forks - I reacall hearing this anyway. Their gears were not tempered correctly and were too brittle (not tough) and their shift forks were weak and would bend easily. I have first hand experience with this problem on three of my own bikes. [links]
It is NOT typical for cracks to develop without influence - like a rock or other impact - possibly internal. The cases are pretty robust and don't just crack out of the blue. [links]
Q: Are there any other ways gear oil could be getting in to the crankcase? more
Q: Is it common for a crack to appear between the gearbox and the crank case allowing gear oil in to the crank case?
There is really only two other places the gear oil could be entering the crank area other than through the seal and that would be between the case halves or past the primary drive gear. To properly repair a leak between the case halves requires splitting the cases - not really a huge job but it can be a challenge if you have never done it before. It can be done without any special tools, and it is not exactly rocket science BUT you can screw things up if you have a heavy hand. [links]
Hey all,
My bike has been blowinga little white smoke and leaving oil on the swingarm for about 6 mnths getting heavier as time goes by. I checked the gear oil and found that 650ml was missing leaving only about 100ml in it. Suspecting the crank seal is shot I have just finished replacing the right crank seal and I rode it in my 30 by 30 foot front yard for about 4 mins in first gear and the bike is now more smokey than ever and is spewing even more oil via the exhaust, even to the point that it "drips" out of the power valve linkage cover aswell. I removed the exhaust pipe to guage how much oil was coming out and started the bike. oil was spitting all over the front tyre.
I adjusted the one on my kymco by first having it give too much oil(pulling the cable/lever further). My exhaust would get an oil spot on it. I kept backing my adjustment off slowly until I stopped seeing an oil spot. If your exhaust stinger doesn't point near anything that oil could get on this may not work for you. Basically you need to know if oil is coming out the exhaust If it is, back the oil off a bit, clean the exhaust and check again after a few days of long ridings. [links]
That being said many pumps have a mark and a arrow/pointer to line up for stock oil ratios. [links]
[links]
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