The Pin is the cheapest item from this partsfiche.
This schematic depicts all components used in the Rm250z 2004 (k4) Usa (e03) Crankcase Cover-water Pump (model K3/k4/k5/k6) partslist.
The Crankcase Cover-water Pump (model K3/k4/k5/k6) assembly is constructed from several parts from which the Cover,clutch is the most expensive.