I tried to weld in my 02 sensor bung for my stock 02 yesterday and to my surprise the bung I bought is much too big. Sucks because I already drilled a big hole for the larger bung.

So I began looking online last night for the proper one and can't seem to find one for the life of me. As best I can tell it's M12x1.25 but I've had no luck finding anything except a like $40 motorcycle kit.

Anybody have any ideas?

If not, any reason I can't just weld on a nut with the correct threading?

 

M12 should be the proper size because I had an aftermarket y turned into a forward feed pipe and used an m12 o2 plug to close off a hole.

http://www.ebay.com/itm/Bassani-O2-Sensor-Adapter-Bushing-18mm-to-12mm-Harley-FLHRC-Classic-2012-/330965752334?pt=Motorcycles_Parts_Accessories&hash=item4d0f189a0e&vxp=mtr

 

Wow, thanks for that link. I don't know how I couldn't find that in all my searching.