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Post by sirnotterwhal on Dec 5, 2015 12:28:51 GMT -5
Hi everyone! I have searched everywhere and done everything I could find and I can't seem to get my scooter going! Can someone please, please, please suggest something!!!! I want to make sure I cover absolutely everything I've done to it so you have an accurate idea of everything that I've done so this might be a little long.
At the end of July I purchased a 2014 TaoTao ATM50-A scooter with roughly 800 miles on it. The guy I bought it from was an electrical engineer for the military and replaced the hoses with military grade ones that would degrade as quickly. He also replaced the battery and the CDI. (I still have the old CDI as it still works, he was apparently just putting a better one in.) He let me know that sometimes the electric starter wouldn't work and that it was either the solenoid relay, which he already had an extra of that he gave me, or the voltage regulator. The starter was acting up so I ultimately ended up replacing both the relay and the regulator. For about two weeks it was working beautifully.
Then school started back mid-August and we had to transport it in the back of a truck to get it here. That's when the real troubles started. It hasn't worked right since. Looking up all the issues online here's what all I've done: replaced the spark plug, replaced the fuel filter, removed the carb and opened it up and cleaned it, changed the oil, drained all the fuel and replaced it.
So here's where we are now: it will start and idle just fine but as soon as I turn the throttle to about half open or so it dies unless I release the throttle. I knew it had been sitting a while even though I had been working on it so I let it idle for a good 15 to 20 minutes before I even attempted the throttle. I read that the valves might need to be adjusted so I got a feeler gauge. I read several different measurements so I have tried both the intake and exhaust at 0.003 and then at 0.004, then I tried the intake at 0.003 and exhaust at 0.004 then the opposite, then intake at 0.004 and exhaust at 0.005 and then the opposite. And of course I've adjusted the air/fuel mixture by turning it 1/4 and letting it set for 10 seconds until the RPMS go down then turning it back 1/8. I've also adjusted the idle.
I'm still having the same problem with the throttle. I have no idea where to go from here. I bought it to get around campus since I often only have 10 minutes between class to get from one end to the other. But so far it has done nothing all semester except earn me the nickname "Scooter-girl". Does anyone have any suggestions on what I need to do next? I have a feeling it's going to be something simple but I just don't know what it could be! Thank you!!!!!
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Post by lain on Dec 5, 2015 12:57:00 GMT -5
It could be tricky, have you gone back into the carb to make sure everything is still in there nice and tight? Also check for any tears or maybe if the needle diaphragm is maybe not sitting right. It sounds like a carb issue, but can't really be too sure, could you post a video of the problem? I wanna hear how it revs up and how it bogs and how it recovers if it recovers from bogging.
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Post by sirnotterwhal on Dec 5, 2015 16:02:44 GMT -5
Hi Lain! I can absolutely do that! I'm waiting on my roommate to get back from work so she can help me hold the camera. Meanwhile I'll check the diaphragm and all. I've been thinking about getting a new carb for it anyway because the one it came with is one of those that I had to bore through the screws to get into to clean it. I really hate anything that is tamper-proof!
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Post by cyborg on Dec 5, 2015 16:51:26 GMT -5
as an easy check,,take a look at your air filter,,,,
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Post by dollartwentyfive on Dec 5, 2015 17:40:09 GMT -5
my guess is the carb jets. the carb needs disassembled and given a thorough cleaning, especially the jets.
the wiring on some of these chinese rides are of very poor quality and can also be an issue.
i had a similar problem with my 250. it would idle just fine, but as soon as you turned the throttle, it would bog down. cleaning the carb fixed it. be aware that the insides of the carb contains delicate parts and must be handled carefully. use a guitar string to clean the jets, a bread tie might work but it will probably not be stiff enough.
electrical problems could also cause these symptoms. a frayed wire that touches the frame could be just enough to prevent full power to the CDI, but not enough to blow a fuse.
also, it sounds like you might have gotten a "bad" scoot. these bad ones will cause you all sorts of headaches until you iron out the problems. i finally got tired of dealing with mine, and ripped out the wiring and "did it right".
but yeah, i'd give that carb a thorough going over.
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Post by rockynv on Dec 6, 2015 9:00:51 GMT -5
Did you transport it upright or on its side? You could simply have a pool of oil or gasoline filling up something it should not be in if you transported it on its side especially if on the left side.
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Post by dollartwentyfive on Dec 6, 2015 9:31:56 GMT -5
the fact that it will start and idle indicates the plug is good, the CDI is good, the valve lash is good. this most likely is not an engine issue. i still think it's the carb or bad wiring.
the engine might not be breathing properly, a restricted exhaust or intake. to check this, unbolt both the intake and exhaust and see if that improves the situation.
another thing, if you aren't mechanically inclined, then invite a friend that is. let them read our recommendations. like unbolting the intake and exhaust i mentioned above, please don't do this from the engine.
it's either the carb or the wiring, i will almost bet on it.
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Post by dyoung1167 on Dec 6, 2015 10:08:21 GMT -5
i'm going with the carb also, as in the needle/cylinder/diaphram. i had the needle break (don't ask me how, i haven't a clue) at the e-clip, so even though the cylinder was going up with vacuum as needed. the needle of course did not. would idle great and even rev half way descent while on the center stand due to no actual load but lucky to get 1-2 mph before bogging down.
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Post by tvnacman on Dec 6, 2015 10:41:33 GMT -5
I would bypass all the emissions and see if it will run. sometimes they can be the cause of problems. Then you can figure out where the problem is.
John
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Post by cyborg on Dec 6, 2015 11:38:50 GMT -5
I think John has a very good point here,,,had an fuel tank overfill issue with a vespa,,,once i removed all the emission stuff the bike ran great
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Post by scoot08 on Dec 6, 2015 17:01:45 GMT -5
Hi sirnotterwhal,this may help or may not, but my scoot had some of the same problems I chased the problem for two days.it would start and ideal just fine but once you gave it throttle it would die. ended up being loose terminals on the wires connecting the coil, just pinched them with a pair of pliers problem solved . I think as the motor revved up it would hit just the right vibration point and causes the connection to fail. anyway you may want to check this. just one more thing to check off your list.good luck and don't give up,you'll find it.later
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Post by pauldog on Dec 7, 2015 14:58:52 GMT -5
Sounds like an air leak. Check the intake manifold gaskets. The intake is the tube between the carb and engine. There is a spacer between the tube and engine. o-rings top and bottom. Spray some starter fluid in that area. if there is an increase in idle u have a leak. Replace the O-rings.
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Post by sirnotterwhal on Dec 8, 2015 9:27:51 GMT -5
Hi everyone! Sorry it took me so long to respond. Finals are killing me. I finally had a chance to check everything yesterday and in the carburetor the pin holding the float tank thing was ever so slightly bent out of place and there was a piece of something blocking the tube going from the petcock to the carburetor! It seems to be running well so far but there is a bit of a knocking sound which I assume means I probably need to adjust the valves a bit more. Thank you all so so much for all of your suggestions! I'm so glad to know that if anything goes wrong with it I can find help here!!!
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Post by JerryScript on Dec 8, 2015 11:14:39 GMT -5
Great job! Now you can enjoy the ride!
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