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Cant go wrong by going by the manual, the "back in the day" stuff doesn't really apply to the new bikes. 38 oz is correct. Some people will also tell you 32 oz is enough for the transmission, this isn't true, not on my bike anyway. It also takes 38 oz to get to the correct level. 32 oz barely reads on the dipstick.
My manual also called for 32 oz in trans but like you said it barely touched the dip stick as well.... added 4 more oz to get a reading