Today I installed the new rear tire and rim, and the new sprockets and chain. The stock rear rim is 10.4 pounds the BST is 7.2 pounds so a 3.2 pound saving, but wait, there's more, the rear stock sprocket and carrier hub weighs 4.2 pounds and the BST carrier and the supersprok I purchased weighs 3.1 pounds so a 1.1 pounds saved. Total rear 4.3 pounds, with the front 3.0 pounds saved it is a total of 7.3 pounds off the bike and this is unsprung and rotational weight so even more important. I was disappointed that the stock 525 chain weighed 4.1 pounds and the new 520 premium 3D chain also weighs 4.1 pounds. But it looks cooler so not too much of a disappointment.
Bought a good chain break and pressor tool, a must when working on a new chain. Getting to the front sprocket means removing the lower fairing, Evap can cover, quick shifter, and sprocket cover. I probably cleaned off a 1/2 pound of grease and gravel out of the fairing and sprocket area. 
Riding to work tomorrow. Then a long ride Saturday to scrub in the new tires.
Riding to work tomorrow. Then a long ride Saturday to scrub in the new tires.