Click here to view X-250 electrical schematic
Click to view the XG-550 gas scooter user manual in Adobe format.

Fuel mix ratio is 32:1 If you want to mix it richer use 25:1 if you want to mix it leaner use 40:1. Note* 32:1 is a good safe mixture, it's lean enough that spark plug fouling will be minimal but rich enough that the engine is sufficiently lubricated and will not suffer any harm. 40:1 and leaner will provide more power but less lubrication. Any ash less 2 stroke oil brand is acceptable for use in these 2 stroke engines. Examples are: pennzoil, honda, lawnboy. All auto parts stores and wal-marts offer these in the oil section. Failure to mix oil with your gasoline will result in engine seizure within 30 seconds.
4 ounces of oil to 1 gallon of gasoline / petrol is = to 32:1 Click here to get measurements.