Is this good

[glider]

Spectro full syn 20-50 in motor.
Spectro 6 speed in tranny.
HD formula + in primary.
I've always used HD syn prior to this last change. I've done some research and it seems this Spectro oil is great so I decided to give it a try. However I can't really tell the difference except that it costs even more than Harley stuff. The bike still clacks real loud when shifting. I can get it locally so I'll continue to use it.

The trans will clank no matter what oil you use. You'll see the difference in the ease of shifting and finding neutral also less fuzz on the magnet at oil change time which IMO is the best sign of the oil doing it's job in protecting wear on the gears.