I have been observing many people who are doing the Carb mods by Dave. I did them and they really work well. But I think many people are over jetting the bikes. I see some people are putting in 165 main and 62 pilots, with very few intake/exhaust mods. I am almost at sea level (1000)FT and have a full White Brothers exhaust, K&N filter, and de-smog done on my bike. I run a 160 main and a 55 pilot. I started richer a 160 main and a 58 pilot and the bike wouldn't idle to well, smoked, and needed gas to start. Everyone told me the bike was to lean. So I enriched the mixture screw, and there was no change. Upset, I decided to walk away and eat dinner. After dinner I thought maybe it could be to rich. So I turned in the mixture screw almost all the way to lean it way out and the idle changed for the better, and less smoke. So that told me it was to rich. Went and bought a 158 main and 55 pilot. All problems solved immediately. Rode the bike for a while, checked the plug and some white was visible. Put 160 main back in and now it's golden brown. The bike idles perfect, more power, and starts perfect. My main concern is that a lot of people see "rich" signs as being to lean. A lean pilot will cause the engine to die after hard gassing. A lean main will cause the bike to overheat. A rich pilot will cause a bad idle, gradual shut down and hard warm starting (BETTER COLD STARTING). Always after doing any re jetting CHECK THE PLUG. A white plug means to much heat (to lean), while a black plug means to rich. Golden brown is what you want. And last but not least the mixture screw should be between 2 and 2 1/2 turns out. The jets are 99% of the mixture. After finding the right spot, the mixture screw should only be used when riding at different elevations. If going up lean out, and going down richen up. Adding a pipe, richen up etc.....Please give me opinions if you agree on the overjetting problem I speak of.