In case anyone's interested I thought I'd post the results of a few tests I ran about a month ago. I figured I'd test rather than just take peoples word for what they liked/felt so hopefully the actual numbers I recorded help. I did this test by placing cones out at 30,60,160 and 300 ft on about a 2% incline with my son running a stop watch. I did three runs for each distance before moving on to the next furthest. The terrain was hard pack with a thin layer of loose dirt and scattered round rocks of various sizes common to the West Coast. The temps that day ranged from 74-77 degrees with 22-24% humidity and conditions continued to be dry and sunny. The bike had a fresh motor,Boysen Rad Valve, and spun a slightly used 18" Maxxis SI with 14/48 gearing. I am a 47yr old B rider weighing about 175 without gear. The parts I tested were the stock carb w/ 165 main, 85, 45 pilot(air screw out 1 1/2) and a Lectron Legacy carb as well. I also ran each of these with pipes in great condition, a 11' Gnarly and a stock pipe. Note: The 11' & up FMF pipes have a larger(2 mm?) diameter so require an equivalent silencer! I ride mainly in the woods and like to play on tighter MX tracks so low end is helpful given the cc's. I returned to the Gnarly and richened the Lectron just a bit as the power is very linear and fuel economy can't be beat. An allen key to remove the top cap is all that's really needed for tuning, but any bike with a big tank's gonna make this a bit of a PITA. I hope this helps anyone who's on the fence about parts or curious. The Lectron' s expensive and I went with it because of the tuning ease and the fact it's made with the same features you have to pay the same amount or more for to have incorporated into a stock carb. On long rides the fuel usage helps too, but if you're on a budget the stock carb does pretty damn good! Have fun out there!!