The '09 Zuma 125 had the same fuel pump issue, which, as far as I know, has been fixed. I never knew exactly what the problem was. I do know that defective parts can be made in all countries, including the U.S. You will not likely find any Asian scooter, including Japanese, that is of superior quality to Kymco.
2002 Vulcan 750 (now being slowly reassembled) 2013 Royal Enfield B5
2001 XT225, 2009 Genuine Stella
1980 Puch moped