Did I miss anything?

Ok Got the trike project put together and it seems like it is going to work. Since this is a new to me bike I plan to do the following before I do any more riding. Bike has 50,300 miles on it 1. New timing belts
2. new coolant
3.new fork seals (leaking) what weight fluid for trike? Rear has air shocks
4.replace front and rear brake fluid
5. Oil and filter
6. New air filter, and fuel filter
7.Drain fuel and add new with 1 oz ATF per gal
8. Check valves
Drive it this summer working out any other bugs and paint this winter. Did I forget anything?

Fork oil weight... automatic transmission fluid -the cheaper the better.

How is it idling? You may need to synch the carbs.

Have you looked at the front brake pads?

Check the 3 yellow wire stator connector, they get hot old and brittle. Can Cause major problem.

Looks Great !!! what rear did you use ? did you do a "work in progress" on this project ? would love to see the details

Nice build