Questions:
Will I need a new cam-cover gasket?
No they are rubber & reusable
What sealant do most use? Is an RTV type product good?
High Heat RTV is good
I assume I want to purchase the brake funnel tool from Beemerboneyard.
Yes
Besides this and a quart of DOT4 is there anything else I need for the brake fluid flush?
DOT 4 is right, if I remember right NO other special tools are required
What coolant is recommended? Any Silicate free for aluminum OK?
Yes
Can I use any SF, SG,SH synthetic 15w-50 or 20w-50?
Any Automotive Oil will work. I used 20W50 Castrol or 15W50 Mobil1 in my LT. NO NEED for motorcycle oil as you do not need the additives for a wet clutch.
Can I use any Synthetic GL-5 90W gear oil for both transmission and rear diff?
Yes both FD & Trans use the same gear oil
I'm thinking about going with the Maintenance kit from Beemerboneyard which includes an oil filter, air cleaner, spark plugs, Fuel filter, crush washers, O-ring for filter door, fuel line hose clamps, fuel quick-connect o-rings, final drive crush ring and filler cap o-ring. Not bad for $90
Yes that is the best deal, also before you order this check your Quick Disconnects on the bike. If they are still the OEM white plastic ones order the metal ones from BBY. The OEM ones get brittle & can brake when pulled apart.
BTW all this work can be done in 1 day, but doing it in a weekend is easier to manage.