Move the shift lever a bit and see if maybe the bike isn't fully in neutral.  Check for a stone in the belt or pulley teeth.

Be sure the nut on the front pulley is tight.....a loose pulley nut can trash the splines on the output shaft, and that generally leads to buying a used engine - as it is a lot of work to tear an engine completely down, and the replacement gaskets and seals are costly.

I've never found that I had to remove the guard over the front pulley ,did you remove the belt? If you did and put it back on the opposite way the "teeth" may make a bit of noise as they are "new " to the pulley.

ok yesterday I took it out for a motorized spin and didn't notice anything terrible while the engine was running, but of course I would not hear the pulley(or maybe it's the belt that sounds like clicks).   I forgot to try the rear brake.

Today I rolled it around engine-off and braked some - the brake still clunks, and the pulley still clicks with every 1.5-2 teeth, so it's not a stone in the belt.  I did not take the entire belt off the the front pulley so it's running the same direction.  I can feel the clicks in the belt with my finger, I did not really expect that.  The pulley cover and beltguard are still off (I kept the bolts in the cover).  Shift is fully neutral a couple of times.  Still sounds like semi irregular ball bearings banging into each other, rolling forward and back.  I did not look at the belt before changing, so new rub marks are not apparent to me.  

That nut on the pulley, shoot - I can get a hold of it, it turns with the pulley and belt, I do have 1.25inch socket.  It's too late in the evening to use the impact wrench (it sets off the alarm system).  I don't think it's loose though.  87ft-pounds torque?

Tire balancing good question, I bought the beads first, stalled on doing the wheel, then decided to use balancing goo instead.  Still have to take the leftover weight off.  

It's got so few miles, could the frontpulley really be loose on the splines?

The shoes and drum were hardly used, I just blew it out a little.  I figure it's still lubed up with dust.  The swingarm tab is in the brake arm slot - yup I was tired after wrestling with the tire, but I did not miss the tab on the second attempt to reassemble.  I did not look carefully inside the shoe assembly - really sounds like something inside the drum, clunking during braking.

I'm thinking 1. tweak rear alignment  2. lose tension  3. center belt in both pulleys.  4. take belt off (not sure how) and see if the pulley clicks with no load at all.  oops 5. look inside the shoe assembly.

#3, I assume is not really possible, the belt will probably always drift to one edge of each pulley - right?  But maybe I can reduce the rubbing force, if that is the cause.  The belt looks like it's rubbing the same edges as before (the old fringes remain on the non-rubbing edges).

Front pulley should be torqued to 94 ftlbs, it helps to tighten the rear brake adjustment nut all the way forward (locking the rear brake) and stick a pipe or breaker bar through the rear pulley and under both sides of the swingarm.this will lock the rear wheel and the belt locks up the front pulley. I would have the trans in neutral to not hurt the gears when applying the torque.

ero4444,there is no problem caused by a belt that's "to loose" all the tension is on the top of the belt.If bottom of the belt isn't scraping the ground ,   it's not too loose. when you adjust the belt tension the bike is jacked up and the swingarm is hanging down,when you ride anytime the swingarm  is level with the road is when the belt is at it's longest and that's when the slack is needed.If you see the bottom center of the belt hanging down (1/2 inch?) that is not a reason to readjust,it's normal.