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Post by johnkiohio on Jun 26, 2012 8:43:25 GMT -5
So, I have 2 of these bought new and almost the same mileage. 1100. Both of them are identical with the problem. The yellow one has many new plugs NGK, a new carb, new cdi, new resistor, valves have been checked, o ring from carb to intake has been replaced and tightened properly, key switch and on/off switch. I have read every article on every scooter forum I can find. The silver one has had nothing done to it. This is the problem with both, you ride them a little bit and then shut them off, they will NOT restart. This past weekend you can only ride them like a mile and they both die and will not restart. Next morning, they start right up. There are several people that have this same problem with the same scooters where we live, we had a local guy sell a bunch of us a bunch of them. 75% of them do this so it has to be something sooooooooo simple.......I have checked and replaced every vaccuum hose and fuel hose also. I would love to hear any input on this.
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Post by tortoise on Jun 26, 2012 10:03:50 GMT -5
I have read every article on every scooter forum I can find. That is pretty hard to believe, since the same GY6 no-start issues are continuously reposted! When the scooters will not restart, what specific efforts have you made to verify fuel, spark, and compression?
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Post by johnkiohio on Jun 26, 2012 11:23:09 GMT -5
I have verified fuel by yanking the hose and removed fuel filters for test purposes, I have verified spark by checking and compression isn't the issue. I used the yellow one as the test vehicle for every suggestion I have read. This is starting to make me believe that they have simply hit their life span. I went into the over filling of the gas tank issue and the overflow hose. No one on here or any other site has ever really found the problem. There is a ton of suggestions with people thinking they know the answer but no one has confirmed from what I have read that they have cured the problem. Please point me to it if they have. The yellow one is usually in pieces just waiting for something new to be tried.
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Post by carasdad on Jun 26, 2012 11:44:12 GMT -5
How did you verify fuel flow to the carb?...just pulling the hose from the carb..will not do it. In fact...if it does flow without sucking on the vacuum line or while cranking the engine....the petcock is messed up. Have you checked the float height in the carb bowl?.... Also your enricher(automatic choke) stays on for about the first mile....after that...it should protrude and shut the choke off. Easy way to check that is....make sure engine is cold....remove the enricher and connect it to a 12 volt power supply or battery...wait 2-3 mins...and it should protrude very noticeably. If not....the choke is still on once the engine warms up..causing it to run way too rich...and flooding the engine out.
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Post by johnkiohio on Jun 26, 2012 12:08:29 GMT -5
The carb is brand new with a brand new enricher, otherwise you idea is a great one. Fuel does flow from the pet cock hose until the amount of fuel from the bottom of the tank to the carb drains out of the line. That has nothing to do with vacuum at that point. The line just drains. The tank fuel valve is brand new too. I am not making this stuff up. I could have bought a Zuma for what I have in the yellow one from original purchase and parts. I am not trying to be stubborn with your ideas, I am just answering them with honest answers. Funny thing is, the silver one hasn't been touched and it has the same problems. Keep suggesting because you might hit the nail on the head. Valves have been adjusted too.
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Post by johnkiohio on Jun 26, 2012 12:12:22 GMT -5
It obviously has also had new plug wire and coil. I think I mentioned that on first post. I have pulled every plug of the machine, I know what people mean when they say the connections move, some had to be crimped a little better. I have spent hours messing with this thing. I simply want to know what it is because of the challenge
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Post by tortoise on Jun 26, 2012 13:03:37 GMT -5
I have verified spark by checking and compression isn't the issue We don't know what you know . . if the situation was reversed, would this be an acceptable response! Why not post what the actual cylinder compression PSI is? Utilize Google search box at bottom of page and enter . . cdi ice test. Also test stator and trigger pickup volts. Obviously if the scooter will not restart, at least one of the fuel, spark, or compression related elements is deficient. Can't read your mind, and can only speculate based on the details provided.
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Post by johnkiohio on Jun 26, 2012 13:09:35 GMT -5
Well, I will run a compression test this weekend when i am where the scooters are so I can give you an accurate number. I don't really remember. I looked at one of the forums and saw what was acceptable and it fell in that scope but I will put in an actual number.
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Post by johnkiohio on Jul 3, 2012 17:42:29 GMT -5
I have installed new vacuum lines, all of them. Same issue. Completely took all plastic off entire scooter and pulled every connection on the scooter apart, no luck. Installed another brand new carb with enricher, no luck. Even though my CDI and Coil were brand new, I put another one of each on. Valves are not issue, adjusted at several different specs according to everything I have read on here and other sites. Fuel is not issue, spark is not issue, spark plug is not issue....brand new NGK this morning. Vacuum does not appear to be issue. Everything is new out of the box and the scooter still will not restart once warm.
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Post by tortoise on Jul 31, 2012 9:23:12 GMT -5
Per another thread . . . discovered an issue with the wire on stator/magneto
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Post by johnkiohio on Jul 31, 2012 9:57:03 GMT -5
That was my post but Thank You! It took me forever, I was going to give them away, shoot them, drown them and run them over with my F350 but instead I kept at it and finally found it!
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Post by tortoise on Jul 31, 2012 10:23:08 GMT -5
So how about elaborating on "discovered an issue with the wire on stator/magneto" . . what SPECIFICALLY was the deficiency?
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Post by johnkiohio on Jul 31, 2012 11:08:33 GMT -5
The wires run behind the flywheel under the "trigger coil" and route around up to the magneto. I had a very burnt worn wire. When I put it back together I made sure the wires were tucked behind the magneto before I fastened to 2 bolts that hold it in place. I am thinking the old wire wasn't tucked behind but I didn't think to check when I took it apart. Anyhow, if that doesn't fix it, you will see it be target practice on Youtube soon! I did break the air box during tear down. I ordered a replacement filter and doing a complete delete of air box. I had already removed all the BS vacuum hoses. I am in a much better mood now that it is fixed. I missed buzzing aroung on it.
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Post by johnkiohio on Jul 31, 2012 11:32:13 GMT -5
Before back together obviously! Attachments:
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Post by tortoise on Jul 31, 2012 12:09:05 GMT -5
The wires run behind the flywheel under the "trigger coil" For others curious . . somewhat related thread.
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Post by johnkiohio on Jul 31, 2012 12:21:24 GMT -5
From your photo, it looks like there is a retainer clip behind the flywheel. I have nothing of the sorts or is that not a retainer? The only parts in mine are the trigger coil with 2 bolts, the magneto with 2 bolts and the flywheel.
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Post by tortoise on Jul 31, 2012 12:43:46 GMT -5
it looks like there is a retainer clip behind the flywheel. I have nothing of the sorts or is that not a retainer? For what it's worth . . don't see a wire retaining clip shown on either the 139QMB 50cc stator or right cover parts diagrams, only the GY6 125/150cc right cover parts diagram (item #3).
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Post by johnkiohio on Jul 31, 2012 12:54:18 GMT -5
I thought maybe they forgot it on mine but obviously not. Anyhow, I am hoping the problem is solved. It would have been a shame to toss them so early.
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