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Post by eclivo6755 on Feb 5, 2019 2:17:19 GMT -5
I have a TaoTao atm50-a with a 100cc bbk. We just upped the jet in the carb to a 98. Tried a 92 and it didn't seem to be getting enough gas still. Anyway, so my bf is riding it and he doesn't always listen to me bc I think we should have gone down to a 96 maybe even the 94. But no. So it runs and all but won't idle although he still hasn't adjusted the carb even though he's been riding it for three days. He basically just keeps giving it gas. Now the two new batteries, one agm one lithium, keep getting drained so the new stator should be here tomorrow. SO! Tonight he calls me to pick him up from work. The carb is blowing out gas where the air filter is. It has an after market filter. Also noticed today apparently there was a little oil leaking from around the drain plug. He hasn't put more oil in it yet though. Do y'all think the jet is too big? I also read that an o ring may have degraded and is blocking the float. What do y'all think is going on? Is all of it related?
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Post by tortoise2 on Feb 5, 2019 11:54:54 GMT -5
my bf is riding it and he doesn't always listen to me WOW . . that may be the first occurrence of that happening in human evolution! The big-bore-kit installation has significantly downgraded reliability . . anticipate continuing to experience one issue after another! |
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Post by gsx600racer on Feb 5, 2019 21:20:02 GMT -5
If its leaking gas, maybe some fuel is getting into the oil and might have something to do with the oil leak.
Sounds like you have a few issues to get sorted out.
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Post by GrumpyUnk on Feb 10, 2019 12:00:38 GMT -5
If you have a vacuum operated petcock, it might be failing, allowing fuel to flow even with the engine at stop.
Fix is a new petcock or replacement of the vacuum petcock with a manual shutoff valve.
If fuel comes out the air intake, you have excessive fuel in the float bowl. It fills up, and comes back out the main jet opening where the tapered needle is. Float valve stuck or possibly has a damaged or worn rubber tip. Fix is a new float valve needle and possibly seat.
Take a whiff of the oil on the dipstick. If it smells of gasoline, I'd suggest changing the oil as it has likely been diluted by the fuel that leaked in.
Perhaps shop for a new bf that will at least listen.
tom
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Post by eclivo6755 on Feb 11, 2019 16:20:52 GMT -5
It was the jet. I kinda figured it was but he was just instant that it wasn't. I basically snuck the carb off and went down from a 98 to a 96 and she runs and idles perfect!! I also cleaned everything out and made her all pretty inside again! Lol! The leak we figured out was the drain plug coming loose somehow so I replaced it too and changed the oil. Thanks for all your help and suggestions everyone!!!! This forum has saved me with this scooter!
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Post by happyheathen on Mar 9, 2019 17:07:45 GMT -5
Im here for Avery similar issue I've got taotao 49 cc bought new last year last time they said the battery was junk - ( a month old) but when I got it home the little latch under the seat to the motor couldn't be put back on because the carburetor was sitting at angle and that little curved metal part with the cable was up into the storage area it still didn't start great and I smelled gas I then had to put it on a charger to get it to start every time then I got my first tank of gas since it was fixed couple days later chargeing wouldn't even start it figured I burnt up battery so I sent my boyfriend to dealer and I bought another and put it on while I was sitting right there I checked the old even tho I'd checked it few days prior it was fine then - I pulled out the dipstick and gasoline came spewing out like a hose all over me and kept coming till I got the cap on after I got done cussing I drained as much out as I could there was ALOT I figured figuring the damage wasn't that bad cause it was never started to get it all three the motor I bought new oil drained oil and gas tank and looked looed around the motor I barely got the seat out for carburetor sitting in wierd position then I noticed the manifold was coming off and that's where alot of gas was leaking out ( by way when I got gas I filled it up drove it about four blocks and there was half tank when I drained it) I also noticed on the intake manifold where the hose hooks up from the petcock was on the other side as it was before it went into shop the first time making me wonder if the hoses are wrong AND the long tube thing from carburetor to exhaust has hose from it to very front of motor I don't remember any hose hooked that way and the carburetor seem unstable in it's mounting
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Post by GrumpyUnk on Mar 11, 2019 10:56:17 GMT -5
happy .. you might want to start a new thread with your particular set of circumstances.
If the carburetor is twisted, you can untwist it, and put it horizontal by loosening the air intake clamp and the intake tube clamp, rotating the carburetor until it appears horizontal, and tightening the two clamps.
When tilted or twisted the float valve likely got a bit out of kilter, and did not shut of fuel flow. It then drained fuel into the crankcase. You did the right thing by removing the contaminated oil and replacing with new. It should have done no damage, and might have cleaned out the sump a bit with the gasoline acting as a cleaning agent to loosen stuff. Not recommended to run an engine with gas in the oil as the viscosity is terrible and offers little bearing protection, along with giving the piston poor lubrication.
There may be two small vacuum tubes that are attached to the intake. One for the vacuum operated petcock, and another that wanders off to some emission control. The tubes can be connected to either side, but the routing may be better if they are returned to the factory position.
I think the long tube from the carburetor to the exhaust at the front is commonly called the EGR system, but it actually is a pulse air system to inject fresh air into the exhaust to help reduce emissions. There is another tube to the cam cover at the front of the engine that most times is routed to the air cleaner. I believe it is the crankcase vent. As the piston goes up and down, the volume inside the crankcase increases & decreases, raising and lowering internal pressure causing a pulsation. That pulsation must be allowed to flow, or you will have oil pushed out of the engine by pressure. The cam cover tube vented to the air cleaner allows fresh, clean air to be cycled in and out without problem. Generally that hose is grey.
tom
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