Tempest bought Precision the makers of carburetors and issued a "mandatory service bulletin' for float replacement. Volare says they will replace floats with the new "blue floats" for $250. If you have a carb and want to know more here are a couple of links:
http://www.tempestplus.com/SB-2%20Volare%20Carburetors%2002-01-2009.pdf
http://www.tempestplus.com/SB-4_O%20Bowl%20Clearance%2003-13-09.pdf
http://www.tempestplus.com/SB-2%20Volare%20Carburetors%2002-01-2009.pdf
http://www.tempestplus.com/SB-4_O%20Bowl%20Clearance%2003-13-09.pdf