Great bike and nice upgrades! What handlebars did you install?

Some suggestions. First, you need to install the safety brace, it's important. Step 1: check to see if you have a frame crack at the aardvark. It can be subtle. Use your fingernail and an LED flashlight. If you do, call up BF. (If it's costly, send me mail.) Step 2: install the safety brace. I strongly suggest pushing some clear vinyl tubing onto it, like I did in the pic below. It'll save your knuckles when rolling.

Second, treat yourself to a pair of Greenspeed Scorcher TR (Kevlar belted) tires. The Kevlar belted version also has reflective sidewalls. The Scorchers are much faster, much grippier, AND much more comfortable tires than the stock Marathons on your bike. Of the various upgrades I did, this was the one that had the biggest effect.