Happyman (greatmoniker!),
See my tagline below for the mods. Here is some advice on the 110's. This is my opinion, there are members on this site that feel differently. Harley designed this motor to run super lean to meet epa standards. The factory will tell you this right upfront. This causes this engine to run hot! They also incorporated new technology into this motor like an adaptive (learning)fuel injection system, an optional heat management system where you can take the rear cylinde offlline to cool in rush hour traffic situations. Ownes have reported on this site and others blown seals, misaligned flywheels, misaligned pinion gears, starter issues, loose compensator nuts etc etc. I chose to do bolt-on mods (exhaust, ac, sert) till I feel more confident in my motor to change cams, pistons etc. Most aftemarket vendors dont have their act together on this particular motor, some disable the closed loop functions on the efi, some replace the delphi unit completely, most aftermarket exhausts are dseigned for the tc 88 and tweaked for the tc 96, you get the idea. There is a lot of info on this site. Read it, take it all with a grain of salt, do your own research and start changing carefully.