Finally all recovered from my foot injury and got the bike all back together and rode it for the first time yesterday. it goes awesome but I can hear a whining noise coming from what sounds like the rear wheel. Not only when i let off the throttle, it happens just slowly cruising through a neighborhood as well.

For an idea of the sounds, it sounds like if you were in a manual vehicle and sped up in first gear and let off the gas, thats the kind of whining that I'm hearing on my bike.

Hoping its something easy to get rid of.

Thanks,
Dave

Is your belt too tight?

You should be able to hold the bottom of the belt and twist it 90 degrees with your fingers.....without straining.

(There is a thread somewhere.....I am on my phone as our internet service is down - so I can't provide a link easily).

And alignment, A string shoved under the belt, roll forward ttill it's at the front of the front pulley, then pulled tight and it should line up with the edges of the rear pulley.
That's how we aligned the pumps on drilling rigs.

was adjusting the bolts and it snapped... not sure what to do from here.

i did loosen the axle. :/

I've noticed a good bit of whining from the passenger seat.

I've never broken one of those although I have seen them broken before.