Pete, the 25w60 pours at ambient temp about the same as 20w50, my engine is EPA strangled so lean it runs the oil at 220 to 250 degrees. I have installed DK's XIED4's that change the air fuel ratio from 14.7 to 1 to 14.0 to1, The oil temp runs about 190 to 210 now. The progressive suspension is softer but well controlled. The 440's have the ability to separate chassis movement from wheel movement, They reduce squat on accel to almost none. The way I have it set up my bike is nearly thought guided and the suspension end to end is balanced. My son runs those soft tires and rarely gets 5,000 miles out of them.
I wish I could afford Doc's 1.25, they are a sweetheart of an engine and not dogs.