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Dyna Glide ModelsSuper Glide, Super Glide Sport, Super Glide Custom, Dyna Glide Convertible, Super Glide T-Sport, Dyna Glide Police, Dyna Switchback, Low Rider, Street Bob, Fat Bob and Wide Glide.
More to it than just the oil, type of springs, amount of preload on the springs and fork oil, I had to make several small changes to get mine where it is now. I run a Bel-Ray 7 wt with Progressive springs
What I am trying to say is one size, or wt, does not fit all. Don't be afraid to try other adjustments.
I prefer lighter weight oil with a better spring, preferably a straight rate spring. Putting heavy oil in slows the suspension action but it does not make up for weak springs. Using a lighter oil with the correct spring allows the wheel to travel over irregularities better maintaining contact with the road better.