Not sure if or how this applies to you guys, but I'll share it anyway.
When I bought my bike I felt that 1st gear was too tall. If you got stuck in traffic you'd never get the cluch out... it was 15 MPH or nothing. I felt the rest of the gearing was fine. When I took the bike to the track, launching it was a challenge because it was either bog or wheelie, no middle ground. Bike was making 93/105 for power numbers with what would be a 'stage 1' on a Harley (airbox/pipes/controller).
Stock front pulley was 33 teeth. I found a company (TurboTec) who made a 31 tooth "Underdrive" pulley (approx 7% reduction in overall gearing) so I pony'd up the $300 and bought one. Installation was simple, took about 1/2 an hour. Definitely fixed that 1st-gear-too-tall issue.... what used to be 2500 RPM is now 2675... 175 more RPM is no big deal.
The speedo and tach read exactly the same as before because they can't "see" the reduction... however the speedo reading is 7% high (indicated 80 is actually 75 mph for real).
I took a long trip on the bike and for the trip I put the stock gearing back in... I regretted it the whole time... as soon as I got home the 31 tooth went back in and stayed there. Even though the bike is making some 37 HP and 35 ft/lbs more power now, I still like the shorter gearing better, no doubt.