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Post by olivertwisted on Apr 17, 2016 16:21:01 GMT -6
So, before I purchased this scooter, I was told that it would go about 5 miles and then cut out and then if you waited 20 to 30 minutes it will start back up. when I first joined this forum, we figured it was the valve settings. They were out of adjustment but that evidently was not the problem, because I'm about 4 miles from home and I'm stranded. It will start back up intermittently, but it will only stay running for a short time and cut back out. My first guess is, fuel delivery? The only thing that i replaced in the fuel line is the fuel filter, and I do have the arrow pointing toward the carb. I'm thinking to check the plug when i get home, to see if its wet with fuel. Perhaps, the choke is sticking? But i don't smell fuel. Jets clogged, and not letting the fuel bowl STAY filled enough? .my rides the other day were all flat but i just climbed a small hill just now and it petered out at the top. What do we think, scooter gang?
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Post by Alleyoop on Apr 17, 2016 16:50:15 GMT -6
Will it start up and stay running if you are on the flats? Where is your gas tank below the carb (fuel pump) or above the carb (Petcock Gravity Feed)? If gravity fed point the scoot toward the bottom of the hill to get the gas flowing to the carb.
Alleyoop
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Post by Alleyoop on Apr 17, 2016 17:03:10 GMT -6
I just checked some of the old pictures and it looks like your tank is up front like on my trike.
So it could be the Fuel Pump that went south or you have a Vacuum Leak.
So take the fuel hose off the carb and stick it in a container and crank it and see if fuel is flowing out.
Alleyoop
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Post by cyborg on Apr 17, 2016 17:14:08 GMT -6
Good point Alley,,, also check the fuel tank cap could be a venting issue
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Post by olivertwisted on Apr 17, 2016 19:22:20 GMT -6
Thanks Alleyoop and cyborg for chiming in! I was on my way home when ya chimed in. It did exactly as the previous owner said it would do to him, it stayed running till I got home about 20 mins after it stalled, with no hiccups on that on the way home. But , I think it's time for some loctite on the front brake bolts, I just found one loosened up pretty loose! As far as a vacuum leak goes, see this port on the back of my airbox ? It was not occupied when I got the bike and when I investigated whether it should have the hose that hangs near attached to it, I read to leave it UN attached .Is that correct? Could IT be the culprit ?  |
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Post by Alleyoop on Apr 17, 2016 19:46:22 GMT -6
Any connectors on the AIRBOX would have had a hose going to it from some emission canister that was probably taken off. So saying that NO OPEN CONNECTORS on the AIRBOX the airbox gets its ONLY AIR from its AIR INLET no other place. So plug up any open connectors on the air box. Sucking extra air would lean out the mixture and the motor would run hot and lean.
But I do not believe that open connector would cause a no start unless the motor got really hot do running really lean.
Did you check out the fuel pump?
Also Does your scoot have any emissons on it? You would see a CANISTER with hoses going to it and or a VALVE with hoses going to it.
Alleyoop
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Post by olivertwisted on Apr 17, 2016 20:08:38 GMT -6
I found that the other end of that hose traces back to the top of the variator housing, right above the clutch. It's plugged onto it.
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Post by Alleyoop on Apr 17, 2016 20:15:27 GMT -6
Ah, that is the tranny vent hose. So you can either plug up the airbox connector and zip tie the tranny vent hose onto the frame(it is just a vent for the tranny is all) or hook up the hose to that connector either way will work. You just do not want the motor to be sucking in extra air is all.
Alleyoop
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Post by olivertwisted on Apr 17, 2016 20:20:42 GMT -6
Ahhh, ok!
So, I'm back to a possible vacuum leak elsewhere then. I read a few times, about drilling a hole into the gas cap. If I were to do that even if there is nothing wrong with my gas cap, could I create a problem?
Also, I remember using WD40 to find vacuum leaks. Is there any reason that I wouldn't want to try that?
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Post by Alleyoop on Apr 17, 2016 20:26:03 GMT -6
Just use a spray water bottle and spray individual areas. There are not to many places that would leak. Around the INTAKE manifold, Air tube from the air box may have cracks, Vacuum hoses having cracks.
ARE THERE EMISSION CANISTER OR VALVES on that motor?
You can drill 1/16 hole in the gas cap and will not create any problems.
If you had bad leak I would think the motor would bog and not like to idle to smooth. So I am thinking more that that it is a fuel delivery problem. So it could be the tank is not venting and stops the fuel from flowing. Or the Fuel Pump is weak and not flowing strong enough to keep up with the fuel usage and you would notice it riding it at higher rpms and long stretchs.
Alleyoop
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Post by olivertwisted on Apr 17, 2016 20:29:40 GMT -6
Thank you.
I see a disk atop the carb that may be a canister? I'm looking for a flashlight to have a better look at things.
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Post by olivertwisted on Apr 17, 2016 20:36:59 GMT -6
That was just the diaghram atop the carb. But after getting a light in there, I remembered THIS canister. And the connections are definitely in need of refreshing !   |
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Post by Alleyoop on Apr 17, 2016 20:41:37 GMT -6
That is the EVAP system that is your GAS TANK VENT FUMES CANISTER. The top hose is the VACUUM hose and will be coming from the INTAKE MANIFOLD or a "y" or "T" connector. A hose will be coming from the top of the gas tank. Now that canister should also have a hose going a Connector on the AIR FILTER TUBING or Air box. If that is not working the gas tank will not vent. I tell people to just take it off and just leave the piece of hose from the top of the gas tank zip tie and take everythins else off and plug up the VACUUM hose at IT'S ORIGIN and plug up where it connects to the TUBING or AIR BOX. That is a CHARCOIL canister and if it is clogged causes the gas tank not to vent. So that right there could be your problem. Alleyoop HOW TO REMOVE: scooterdoc.proboards.com/thread/9954 |
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Post by olivertwisted on Apr 17, 2016 21:23:12 GMT -6
Okay so, the one that goes to the gas tank has another valve of some kind in-line from the gas tank to the canister too. Here's that:  If I get you clearly, #1.Just zip tie the gas tank vent hose somewhere after disconnecting it, and should I disconnect it before the valve in the pic above, thereby cutting it out of the system also ? #2. Plug this nipple on the "T" connector where the hose comes off.  And #3. Plug the connector right here, where the large hose plugs to the back end of the airbox nozzle?  |
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Post by Alleyoop on Apr 17, 2016 21:25:14 GMT -6
You got it, then all you have is just a short piece of hose coming off the top of the gas tank.  Now you do not have to drill a hole in gas cap the hose is venting. |
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..BAD TO THE BONE..
