Check out the adjustment and tuning instructions. Read, learn and enjoy: http://www.mikuni.com/pdf/vmmanual.pdf
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The cats meow, the bees knees
June 12, 2019
taco eater :
Forrest Pacholke from Mapleton, ND United States
Put this on my ‘78 hobbit pa50ii with the DR 70cc kit and the mlm intake, thing is loud, sexy and fast, jet it down, even if you have high compression, I suppose a 17.5 idle and I haven’t figured Out what main jet yet.
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Running on my '78 NC50
October 27, 2018
taco eater :
Hunter Skiff from Boca Raton, FL United States
Have this carb coupled with the MLM VM20 intake on my '78 NC50. Jetted 150, 17.5. Works great!!!
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BUY ME NOW
May 25, 2018
taco eater :
nash brunelle from tiverton, RI United States
It really is that much better than Dellorto.. I mean soo much easier to tune and deal with.... running mine with treats reed kit, gonna get the malosi 4 petal so different intake for that...change the idle needle to 17.5 like others advised, and i'm running 140 main, first shot and its purrrfect... maybey dropping to a 120, but im happy. Bolt on awesomeness, my #1 carb 4 eva
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Runs first time, easy to tune
January 25, 2018
taco eater :
Doug Wilhelm from Gladstone, MO United States
Plug and play! Installed with a bunch of other random performance parts on my NX50 and it just... WORKED.
While the bike runs, the vibration transferred through the MLM intake causes this carb to puke fuel through the atmospheric overflows. When this occurs, the bike cuts out due to fuel starvation. This has made fine-tuning challenging.
Also, my VM20 came with a 100% plastic float, which is non-adjustable. Not necessarily the fault of Treats, but I know this was not previously the norm for this carb.
Great Carb 
Runs first time, easy to tune