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From what you describe the engine is flooding. Assuming you are getting a constant fuel flow *without* vacuum on the vacuum line then the fuel petcock is bad. You can follow JerryScript's instructions to test it.

However, even if the petcock is bad the carb FLOAT VALVE should cut off extra fuel flow. If you take off the carburetor and remove the bottom "bowl" you will see a big plastic piece (generally white, sometimes black) inside that moves freely up and down. If you blow against the FUEL INLET and move the float up and down, when the float is up it should cut off the air. If it doesn't the valve needs to be cleaned and possibly the needle valve replaced. If you are confident in your mechanical skills you can attempt to disassemble it and clean it. Be careful for SMALL PARTS. If you're not comfortable you might need to replace it.

Be advised, if you replace your carburetor you may need to swap the jets from your old one to your new one. It depends on what jets come with your new one. They vary. Idle jet (long thin) and main jet (small).

From what you describe that is the issue.

You should adjust your valves anyway. Lots of videos and how-to's floating around. .004" intake and .005" exhaust.

Greg

Possibly it could also be a worn belt. Either way you need to remove the CVT cover and take a look.

Sorry to say you got ripped off.

99% of the people who buy scooters online have no idea what is required to put them into PROPER working condition. Companies who drop ship scooters online do not properly educate their customers. Because most people who buy them online don't have much mechanical experience there are always going to be issues. I stopped selling scooters online because of these issues. I only sell through my shop where my people can directly work on the scooters.

*Other* scooter shops turn their noses down on Chinese made scooters. Trust me, it wasn't just that one shop.

Fine for me since there are more Chinese made scooters in the country now, and we're the only scooter shop in the entire state of Maine that exclusively works on them. (We're the only true scooter shop as well, but that's beside the point).

Anyway, to answer your questions:

The exact length of the throttle cable does not matter as long as its not too short. The typical 150cc Tao Tao throttle cable is around 76". What matters most are the connecors. There are three main types of connectors. We haven't had one of the BWS through our shop yet, but I'm certain they use the same throttle assembly that they do for most of their other 150s. eagleatvparts.com is the Tao Tao official parts website. However, you can get the throttle cable from anywhere, including us. To replace it you'll have to remove some plastic body panels as the cable is zip tied to the frame.

Any good motor oil will be fine. There companies that sell scooter specific motor oil. We sell one brand at our shop and it is very good. Any brand name 10W30 or 10W40 works fine. It depends more on your environment as to which weight oil is best. We use 10W30 and 5W30 in all our new sales and our rental scooters. If you haven't done so, CHANGE YOUR OIL NOW! It did NOT come with oil in the motor. It came with some kind of assembly fluid that passes for oil over in China.

The cause of the vibration could be many things. Hard to tell from your description. It could be something loose in the drivetrain, a loose cover on the exhaust, a loose mount. If it increases as you rev, listen if its coming from the exhaust or from the CVT cover. If it is coming from the CVT cover then DO NOT RIDE YOUR SCOOTER! There is something wrong with the variator and it needs to be fixed. Most likely though it is a loose exhaust mounting bolt.

The increase in exhaust loudness typically is as mentioned above: loose exhaust bolts.

One of the most basic things to do in a PDI (post delivery inspection) when you first get your scooter is to make sure ALL bolts and screws are tight. They WILL loosen up over time, especially the exhaust bolts.

Hopefully this will get you started.

Which scooter? Pictures? Every scooter basically has different hoses that route to different locations, even within the same scooter line.

Typically there is a line that goes from the EGR or the PCV valve to the intake to reburn crankcase vapors or exhaust gases.

We need pictures to tell you specifically for your scooter though.

What year Tao Tao? Some of the older ones have a 4 wire stator. The newer ones have a 3-1-1 (5 wire) but a few have a 4-1 (5 wire). If you are getting less than 12v at the battery when its revving the stator is bad. The voltage should jump upwards of 14v. We've rarely seen an issue with the rectifier on Tao Tao that have charging issues. It's almost exclusively the stator.

The speedometer and odometer are singly housed but two separate components. There are no user-serviceable parts in the speedometer. In the old board I had some great photos of the internal workings of the speedo. Basically it uses magnets to push the needle against a spring. The more the magnets spin the more force against the spring, the higher the speed. Something inside the speedo is bad/bent/worn. The speedo is fairly simple to take apart if you want to dare to look at it, but if you don't know what you're looking at you may make it worse. A new gauge cluster is about $45 and some used may be floating around for free to $25.