Normally if the netbook it too small to comfortably include a Recov partition, the manufacturer will either provide disks with purchase or will ship them free if requested within a prescribed time limit. Otherwise they charge shipping.
Your best choice however is to wipe the HD to go completely clean with a clean install using the methods suggested earlier. This is a much better install as the bloatware and useless factory utilities don't weigh down Windows 7 so it can be as light as your netbook.
Here are some tips for a perfect install: re-install windows 7