I'm running the 20mm KLX140 carb on my 110 w/the float bowl off of the 110 carb, and the 110 choke cable bracket installed. I have it jetted to the stock 38/80 that the 110 carb is jetted to stock, and I had to slot the air screw to fine tune it. It bolts up just like the stock 110 carb.
Runs a little bit stronger than the stock carb-- but I do have the stock pipe and air box on still. I like the bike to be quiet as it gets ridden on backyard tracks... I use it to get around sometimes at big bike races... etc...
All in all-- I've found that if your 110 is stock, just leave it stock and enjoy it for what it is. IMO-- the best thing you can do to make it faster, is a Tak primary drive gear, 4th gear drum, and manual clutch. A cam, pipe, port job, and 40/85 jetting will take it another step higher w/o sacrificing the quietness and reliability of the stock motor-- which is incredible. Hope this helps. -L*64