I've got a 1985 FXRT, does anyone know thread type or specs regarding size, sae threads or millimeter threads for an oil bag drain plug. Over in the touring section an advertiser is hawking something called QuikValve. It's a drain plug with a petcock type open or closed tang to ease in draining oil. Cross referencing with threads to match their stock is the only way to make things work. I contacted them and they don't make bike specific plugs.
Thanks in advance

 

Take the drain plug to the hardware store, keep trying nuts till you find the one that fits. Pretty sure its Sae.