SCOOTER.

FROM THE DRAWING YOU HAVE POSTED I WOULD SAY THEY ARE 2" LONGER THAN STD.
I COMPARED THEM WITH THE MEASUREMENTS FROM A 4" LONGER ARM AND THAT MEASURES 255 FROM THE CENTER OF THE PIVOT TO THE CENTER OF THE LINK PIN.
WHEN THEY MEASURE LONGER ARMS IT IS DONE DOWN THE LENGHT OF THE ARM PARALLEL TO THE ARM ITSELF. THAT IS WHY THEY CALL THEM #" LONGER ONLY AND NOT #" LONGER BY #" WIDER.
HOPE THIS HELPS.