Mine is 3/4" ID, 1" OD.
The top lip needs to extend out over the oil fill hole cutouts though (where the tangs of the twist on cap goes). Ive read those are 1.22".
Ill keep searching. Honestly surprised this is such a chore.
I have heard of ppl having the same problem before. I think they stopped making them or something I can't remember. I will measure the ones I have and see if they are close if it will work I will send you one.
