Here's what I have on mine (* or plan to have soon)
1) All the ACE stuff (Piston, cams, head, airfilter, carrillo rod, NTN bearings)
2) High output oil pump
3) Thunderbird 500 front end ( the 41 mm forks are amazing ) - the GT uses the same except there's place to fit a fork brace
4) Michelin Anakee2 front tire - There's no better tire
5) Greasehouse Customs Aluminum silencer - it's not ideal, but gives a balance between noise and performance. I'm going to get them to make me an open bore one. It looks fantabulous, quality better than what you may see on a Harley
6) Bosch coil
7*) Boyer EI
8*) Hagons
9*) Greasehouse aluminum box section swingarm
10*) Michelin Sirac 18" rear tire
11*) Greasehouse rear sprocket with extra teeth to offset the 19" to 18" rear wheel ratio change
12*) Completely custom homebuilt MOSFET based wiring and switching
13*) Seat with inbuilt toolbox, maybe I'll discard the existing toolboxes
14*) Composite mudguards
15*) AVL Thunderbird rear subframe
16*) Aluminum alloy stand
17*) CB 750 like tall fuel tank (24 liter) with aircraft style lid
18*) Twin clocks
19*) Projector headlamp from TB 500
20*) LED based 2x1100 lumen extra lighting mounted on crashguard
21*) Extra short handlebar - I've always preferred short straight bars
22*) Slightly rearset pegs with gear linkage for a 1 up 4 down shift pattern
23*) Alloy rims - maybe I'll get greedy and get some rim that can take tubeless tires while still having spokes
24*) Accelerometer based brake light, 30 Hz brake light flasher (known to increase visibility)
25*) Lightweight battery
26*) Brembo disc and brakes from the ContiGT
27*) Fork brace
28*) LED indicators
29*) Ratio rockers
30*) ACE GP head (pipe dream)
Whew! That's a lot of "TODOs"