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Post by ghcoe on Apr 28, 2015 13:50:20 GMT -5
Yup, that is why I am leaning towards a cracked head or head gasket. Going by the amount of leakage I am thinking the pressure side of the oil system. I can not think that simple flow back to the case would leak this fast. I am assuming that the oil system supplies pressure through a head bold cavity? Have not found a schematic showing the oil pressure routes to the head so just guessing until I can look into this farther.
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Post by ghcoe on Apr 28, 2015 12:19:39 GMT -5
Hope to get some time this weekend. I am going to take a look at that valve cover gasket again. It is a bit iffy at the head mating surface with that shroud in place. There is a gasket that goes between the shroud and the head and it looks like it may be causing interference with the valve cover gasket. The valve cover on this unit is held on with two bolts that go through the cover into the top of the head. They have a flange on them that allows you to only tighten the valve cover so tight. Seems to me that the leak was worse after I took the valve cover off and reinstalled it. Although, I think I should be able to see a leak at the valve cover, but weirder things have happened.
If that does not work then I will be taking the shroud off to inspect closer. Thanks for the help guys.
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Post by ghcoe on Apr 26, 2015 17:40:47 GMT -5
Here is a video of where the leak is. Still looks like a pressure side of the oil system as fast as it is blowing out. Cracked head or blown head gasket?
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Post by ghcoe on Apr 23, 2015 18:34:22 GMT -5
Well thanks for all the info guys. I think it might have a cracked head. The leak would be coming form the area between the exhaust port and the timing chain protrusion. I thought by looking at it with the mirror that that void went to the top of the motor, but looking at the picture above I can see there is no void through the head. I was reading where some of these heads did have issues with cracking by the timing chain area. No good pictures to where, but the descriptions seem to be about right.
I will inform once I get it figured out. Thanks again, George.
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Post by ghcoe on Apr 22, 2015 22:05:31 GMT -5
Is it leaking from the vent hose or from between the head and valve cover ? Too much oil will cause the oil to blow out of the valve cover vent hose . not saying that's your problem , just a possibility . As far as I can tell it is not blowing out of any hoses. I took a mirror and watched the spark plug area and saw oil begin to flow from what looks like a hole in the cast down to the spark plug and start dripping off the exhaust studs. The hole looks like it is suppose to be there so I think it leads to the top of the motor. Valve cover bolts seemed to be tight, not ruling that out though. Bike has been running fine and this was his first longer drive with it. He looked in his rear view mirror and saw a smoke screen behind him and shut it down. Oil is leaking pretty fast so I think it is in the pressure system. |
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Post by ghcoe on Apr 22, 2015 21:23:14 GMT -5
My son purchased a Dong Fang 200cc scooter (160cc) GY6 style motor. It sprang a sever leak tonight. It has less than 500 miles on the motor. Leak looks like it is coming from the top of the head and is flowing down and dripping from the exhaust port location. Cannot exactly see where the leak is at because of the shroud. Motor runs fine and is not making any noise, but we are not running it because the leak seems to be on the pressure side and we are afraid it will pump all the oil out in a short time. Not too familiar with these motors yet, but before I tear into it I thought I would ask if there is a simple or common problem that is know.
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Post by ghcoe on Sept 22, 2014 12:10:18 GMT -5
Might take a look at greenearthscooters too. We just picked up a scooter from them for 669.99 shipped.
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Break in
by: ghcoe - Sept 21, 2014 22:16:14 GMT -5
Post by ghcoe on Sept 21, 2014 22:16:14 GMT -5
The big 3 have most their parts made in China. China is trying to break into a market dominated by the big 3. Don't think of them as a 3rd world country anymore. Most of there factories have brand new machines installed.
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Break in
by: ghcoe - Sept 20, 2014 11:35:39 GMT -5
Post by ghcoe on Sept 20, 2014 11:35:39 GMT -5
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Break in
by: ghcoe - Sept 17, 2014 18:35:50 GMT -5
Post by ghcoe on Sept 17, 2014 18:35:50 GMT -5
Whoops!
Naa....just kidding. Breaking in mine hard. Changed oil when I got it and there was quite a bit of dust in the oil. Changed it at 50 miles and looked much better. I think the new oil just flushed the case. Changed oil at 100 miles and had to really look to find anything. No "wool" or anything big. Running her hard from the get go. Running smooth and very peppy from start and has great throttle response even I the higher rpms. Pretty happy with my results so far.
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Post by ghcoe on Sept 16, 2014 20:56:04 GMT -5
I think if I were to not get a traditional scooter I'd probably end up with a traditional cruiser or dual sport motorcycle. Not a big fan of the styling on that hybrid. That hybrid is a direct knockoff of the "60's Honda Cub. If you are interested in a reasonable dual sport you might take a look at the Zongshen RX3. They should be imported soon. Good thread on it here www.chinariders.net/showthread.php?t=13440 |
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Post by ghcoe on Sept 15, 2014 18:20:30 GMT -5
My manual says 91+ octane. If that ethanol free fuel was 91 I would be all over it.
Just a hint. How many hoses does that pump have? By the looks of the photo just one. The hose alone will hold about a gallon+ of fuel. If you select a different fuel grade from the person in front of you, you will get about a gallon of their selected fuel grade. If they used a lower grade of fuel you just paid premium grade price for low grade fuel in your scooter. Most scooters only hold a little over a gallon. I look for pumps that have separated hoses for all the grades, or I take a gas can when I fill my car and fill the can after I pump a gallon or so into the car.
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Post by ghcoe on Sept 14, 2014 8:24:40 GMT -5
Good read. I have a similar thread on another forum. Too lazy to post twice and loading photos here kinda sucks. Have fun and keep on posting......
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Post by ghcoe on Sept 12, 2014 20:54:05 GMT -5
What?
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Post by ghcoe on Sept 12, 2014 18:14:56 GMT -5
First tank fill up that I was able to track. Took 1.166 gallons and went 91 miles. That shows 78.04 MPG. Not bad, right on par with what they say these things should get. That is a lot of in town driving with some 45mph + driving for good measure. I also think I got the tank a little bit fuller too so it could be a bit better. Not to mention that it probably is not broke all the way in yet.
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