You need to get the proper fuel to oil ratio to keep your 60’s or 70’s Harley-Davidson Utilicar running well. Here is the mixture levels below.
For a 1965-68 Harley-Davidson Utilicar it takes 5 oz per gallon. This is quit a lot, but that’s what Harley specifies.
For 1969 and newer Harley-Davidson they take only 1.5 oz per gallon of fuel.
Please try and keep these classic Harleys running strong for years to come.