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Puma and Wolf are both Znen scooters and are sold by dealers. The Lance Havana, Cali Classic and PCH are made by SYM and sold by dealers. The secret to a good Chinese scooter is basically how well all the niggling little faults are squeezed out of them before they hit the road. That has to be done by a dealer or you depending if it was bought online or from a brick and mortar store. Also a realistic appraisal of how it will be used is paramount. If you need a scooter that has to run flat out all day buy a used Japanese scooter off Craigslist. The Yamaha Vino 125 has been around for years and sometimes can be found in your price range.

The Maxima looks fine. Yes, that is the right Seafoam and as "Jim" says, add it to the fuel tank to keep your carburetor clean. Don't fret about the oil. As long as it's two stroke specific it will be fine. The Maxima is a synthetic blend, that should be great. Regular dino two stroke oil served me fine back in the day. Remember that the oil lubes the bearings, rings and wrist pin and then is flushed up into the combustion chamber and burned. It doesn't hang around long enough to suffer molecular shear or Thermal Viscosity Breakdown and flows through the engine and out the exhaust pipe. Two stroke oil leaves fewer deposits when burned. If you ever saw an old sixties two stroke with clogged exhaust ports and muffler baffles from using regular four stroke oil you'd know why a two stroke specific oil is essential. Also buying oil from the dealer helps you keep your face in front of him when you buy oil. It never hurts to have a dealer on your list of resources.

For how long? Obviously two stroke oil is made to be burned but it also protects bearings and rings like four stroke oil.

It's just from sitting. A long ride will clear it out. Two strokes always smoke and are simple to fix anyway. Good luck, you made a good choice. The Yamaha will serve you well.

.motorcycle-superstore.com/motorcycle/2%20Stroke%20Injector%20Oil" rel="nofollow" target="_blank">.motorcycle-superstore.com/motorcycle/2%20Stroke%20Injector%20Oil

PJ-1 or Bel-Ray are both good companies. The cost might be breathtaking but keep in mind the length of time a quart lasts and the protection those oils offer. Amsoil also offers a two stroke oil.

I am still considering the used Zuma 50 (2013 4-stroke) just because I've heard it's a better bike overall than most of these others I've been testing which are a bit cheaper and not made in Japan.

I would stick with the Yamaha regardless. The engine came out of the homely C-3 and is quite robust. A couple rode a C-3 across Canada two up, problem free several years ago. Not to put a knock on the others, SYM builds a quality bike, but Yamaha has been in the business a long time. My experience with two strokes, admittedly from many years ago, is that with one person acceleration is brisk, but put a load on it, such as a passenger and it doesn't have the low end torque a four stroke does. In most urban settings, how a machine accelerates from a stop light is crucial. If speed is critical size matters alot. I'm sure there are 72cc kits for the Yamaha that will make a two stroke's allure pale. Don't dwell so much on speed as reliability. Plus I seem to recall a quote of $1000 for the Yamaha.

Yamaha Zuma 50F (2013 $1,000 used 300mi)

Check back in and let us know what you did, inquiring minds want to know.