Shop manual unavailable at present..some confusion as to Primary oil capacity 1980 XLH Ironhead Thx

 

a screw exist just below mid hight of the primary twards the front - you fill it till the oil drips out with the bike straight up - puting in just short of a quart is also what one can do

 

Thanks..now time to fill it up and move on!

 

All IronHeads primary oil either 1.5 pints == 24 fl oz, or until it drips out as mentioned by johnjzjz.

BTW, the 1980 and 1981 take 4 quarts of engine oil, not 3 like all the rest. The 79 tank looks like the 80-81 but is not the same.

 

Thanks IronMick for the fast reply

 

Hmmmmmm........ I have an 81 XLH with a build date of 11/80 and I can't get more than 3 quarts into it. If I go for 4 it will certainly overflow. I wonder what's up with that?

 

I would guess that the factory was using up previous year parts. Post a pic of the right side tank area. The '79 tank has a different configuration for the filler spout. I might recognize it. I had a 1980 for 6 years, and have a friend who had a '79.