Specific model manuals really don't exist. Look around the Chinese scooter forums for engine types. Many have tech sections with information. Scooterdoc, here, scooter professor, scootdawg proboards, scooter rebels. Also Haynes makes a scooter manual.
2008 Eagle Milano 150- 9,679 miles 2009 Honda Rebel 250- 10,434 miles (Hers) 2009 CF Moto Fashion- 16,023 miles 2009 MC-114 50cc Cub Clone- 4,347 miles