Nath, Hendersons Mowers in Ballarat have GXV160's for about $550 so they are pretty good pricewise, they have a 7/8th shaft. If you go to the GXV160 off the self propelled Hondas they have the 1" shaft but they are about $50 dearer. Firstly you need to get the pulley off to check shaft size and you can go from there