Don't know it this will help but the late 90's gsxr's were notorious for having leaks around the fuel pump in the bottom of the tank. I had the same symptoms, I could smell gas but couldn't find a leak, until a friend with the same bike told me to check around the pump gasket. I only found the problem after I lifted the tank and felt around the seal. I don't know if SV's have a similar setup. Good luck.
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