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Riding with a passenger puts you near the GVWR (gross vehicular weight restriction). This makes the clutch slip more during takeoff, leading to glazing on the pads. Riding two up means more frequent CVT maintenance and replacement.

LEDs often require a resistor wired into the circuit in order to trigger the flasher unit, they do also make flashers designed for LED lights specifically.

If it's jetted lean at the factory, it's probably not lean at high altitudes.

1) most complaints are from those who a-expect a rolls royce for the price of a scooter, and b-don't maintain their scooters

Once you have yours, clean the carb, set the valves, and check all hoses and wiring/connections. Toss in some seafoam gas treatment, and change engine oil and tranny oil.

2) Most chinese scooters are gy6, but not all. Look on the lower left cranckcase for the gy6 engine stamp, standard ones are 139qmb fir 50cc and 157qmj for 150cc, additional letters sometimes indicate versions that are more difficult to get parts for, but that is rarer these days.

3) There are tons of good parts dealers, our banners at the top of the page are dealers who also participate here from time to time, good people.

2strokes are a bit quicker off the line, but adjusting your cvt on a 4stroke will give the same results. Performance parts are cheap, and installation is easy, these are not hard engines to work on, body panels come off easily giving you full access.

Welcome, and good luck with your scooter!

Try setting your valves.

The air/fuel mix screw is probably capped with a brass plug. It is located on the top right of the picture, so when standing on the left side it is on the lower side near the front. You can drill a small hole in it, then use a screw to remove it.

Did you set your valve lash?

Did you try unscrewing your air/fuel mixture 1-2 more turns out?

A bbk uses more air and fuel, so you need to adjust the carb accordingly.