New Suzuki Quad 500 carburetor diaphragm fits 98-02 with diaphragm OD of about 68mm NEW never installed. Check under your carbs cap for the size. These help the performance of these old bikes. 

1998 QuadRunner 4WD (LT-F500F) - CARBURETOR

1999 QuadRunner 4WD (LT-F500F) - CARBURETOR

2000 QuadMaster (LT-A500F) - CARBURETOR

2000 QuadRunner 4WD (LT-F500F) - CARBURETOR

2001 QuadMaster (LT-A500F) - CARBURETOR

2001 QuadRunner 4WD (LT-F500F) - CARBURETOR

2002 QuadRunner 4WD (LT-F500F) - CARBURETOR