72 front with power valve and 80 front blocked.
(I would say no higher than 74/82 front)
85 rear power valve blocked. The front barrels on and 800 are the same as a 750 dp the rear barrels are 1/2 between a 750 and an 850.
I have one I bought in 1977 so done lots of jetting and 72/80 front and 85 rear will be pretty darn close. maybe 74/82 but still 85 rear.