2007-2009 Suzuki LTZ90 factory service manual, Page 133Get this manual
FUEL SYSTEM
If the needle valve is worn, as shown in the illustration, replace the needle valve assembly with new oneClean the fuel passage of the mixing chamber with compressed air
FLOAT HEIGHT ADJUSTMENT To check the float height, turn the carburetor upside downMeasure the float height while the float arm is just contacting the needle valve with vernier calipersFloat height A: 16 mm (0.6 0.03 in) 09900-20102: Vernier calipers