Replace your HSR42, HSR45, or HSR48 float bowl gaskets with only genuine Mikuni parts.  The genuine Mikuni bowl gaskets are made from a rubber polymer that remains pliable even after many years of use.  Using Mikuni float bowl gaskets ensures an exact fit and proper function in all conditions.  This gasket fits all Mikuni HSR carburetors.

Mikuni part number 616-94028