No.
Harley Davidson recommends it (Citco I think) but No!!! Just use the correct weight for your motor, time of year and how you ride it!
Recommended oil is 20w50
3.5 qts
Use HD oil only and if you can afford use synthetic
For a 1997 Harley-Davidson Road King, the recommended transmission oil is a high-quality 20W-50 motor oil, specifically formulated for use in Harley motorcycles. You can also use Harley-Davidson's own products, such as their Transmission Lubricant or their Synthetic 20W-50 oil. Always check the owner's manual for specific recommendations and specifications to ensure optimal performance.
yes
should be 20-50 wt harley oil but check with your dealer first..
NO
20-50w
I am not sure of viscosity, but if you have Harley Davidson on your fuel tank, you should use Harley Davidson lubricants. H. D. primary and trans lube or H.D. 20/50 synthetic motor oil will work just fine.
In as much as Harley has discontinued Sport Trans Fluid and it's now an obsolete part number I think the only HD product out there is Formula+ for your use.
For a 2007 Harley-Davidson Heritage Softail, it is recommended to use 20W-50 synthetic oil for optimal performance, especially in warmer climates. If operating in colder conditions, you might consider 10W-40 oil. Always check the owner's manual for specific recommendations and ensure that the oil meets the necessary specifications for Harley-Davidson motorcycles.