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As noted on Chevron's Web site, while conventional gasoline can dissolve up to 150 parts per million of water at 70°F, the situation is different for gasoline oxygenated with 10% ethanol. This 90% gasoline/10% ethanol blend can dissolve up to 7,000 ppm of water at 70°F. When this blend is cooled, both the water and some of the ethanol become insoluble. Contacting the blend with more water also draws ethanol from the blend. The result, in both cases, is two layers of liquid, an upper ethanol-deficit gasoline layer and a lower ethanol-rich water layer. This phase separation of the gasoline/ethanol mix lowers the octane number and may cause knocking in an engine, while the engine will not run at all on the ethanol/water layer.


This I copied from web: It shows how 90% petro gas and 10% ethanol mix. Now if this occures, well eventually my engine will not start up. So by placing 100% petro gas in the engine every once in a while will prevent this from happening.. maybe.. And adding 100% petro in the winter might prevent this from occuring.

Ya, some bad and some good. The Roketa MC-13-250 scooter seems to be a good scooter, but a person buying one has to know how to work on it themselves. I have over 5000 miles on mine, runs good but I do my own work on it. Now Roketa makes 150cc scooters and well as 49cc scooters, some good some bad.. I rode mine today at 35 degree outdoors. I took the wheels off my scooter and brought to a car tire place to have them changed. You can have work like the done, but not bring your entire scooter into a car place to have them change the tire that is on scooter still. They expect you to know how to take off a wheel, change fuel filter, gas lines, do a valve adjustment, adjust carb, ect.. Most scooters are pretty simple to work on. I love working on my own scooter, to save me money and learn about it.. Not everyone enjoys it and if not, well don't buy a chinese scooter.

Does anyone have one of these?

Bashan,
Ya, I have had mine up to 76 mph too. But that was when it was new.. Now that parts are a little worn in, well it goes 70 mph..If I changed the clutch, belt, roller weights.. it would do that speed again. It really rides alot smoother at 60 to 65 mph verses 70 to 75 mph.. I personally think pushing the scooter to go faster, will ruin it faster too. I want the scooter to last along time and the best way to do this, is watching the heat gauge and not let overheat, don't push the scooter to perform at max speed but instead ride on 3/4th throttle verses full throttle..

Ya, I live 90 miles from St Louis. My wife rides a Honda Rebel and I ride a Roketa Bali 250.. Still thinking of joining..

Ya, her bike would smoke my scoot.. Hers has 2 cyllenders making it running cooler. Mine has 1 cyllender runs hotter but is the honda Helix clone engine. Mine will top out at around 70 mph and her Rebel will top out at around 85 mph..