spring

I opened my engine up to replace gaskets and stretched this spring on accident. I haven't been able to find any replacements, should I just buy one that looks close enough from a store?

OK, getting bike ready for spring riding season. Put in new gas, checked oil, added coolant, stuck battery on charger for a bit just to be safe, etc. Bike starts up and idles like a champ. However when I start to take off it dies. I figured that was a problem with residue clogging the jets in...