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>> WR Heads data chart


Part No. Models Year Description
R0009-41A [set] WR 1941-1947 Aluminium head set. Wide gasket area. Valve pockets closer to bore and sized for the WR unique valve head measurements [1.81" In. & 1.56" Exh.]
R0009-48A [set] WR 1948-1952 Aluminium head set. Wide gasket area. Valve pockets closer to bore and sized for the WR unique valve head measurements [1.81" In. & 1.56" Exh.]. Heads have a piston relief for use of special pistons that extend into the head at TDC*.

*TDC: Top dead Center: "highest" point of piston travel.

Extra special thanks to Beachdog for providing this information gathered during more than 30 years dealing with WLDR/WR bikes.