Based on the exploded diagrams, both the KF2 and the KC use the same 20T pulley (U4677) but the 113T belt has a different part number.
KF and KF2 113T belt:
U4474 4mm Bando Belt 113T - Cougar KF
KC 113T (position 1) belt:
U7075 Bando 113T x 4mm Belt - Cougar KC
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