honda mb5 replacement 18mm carburetor
honda mb5 replacement 18mm carburetor
 



  $59.99

 :*sorry none today*

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replacement stock style 18mm carburetor for the honda mb5, mtx, and ns50!

comes with unlabeled jets inside that are probably the stock size, but this carb uses oko round style jets here!!

flange bolt hole to bolt hole is 48mm

air filter OD will use 38mm air filters!

has idle screw, air mixture screw, round slide and quick screw top

taco rating taco rating 5 of 5 5 of 5 Total Reviews: 2 give your taco rating here

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5 of 5 Yay June 23, 2026
taco eater : Olimsamoth from Seattle, WA United States  
MB5 tuning gasoline into sound AND acceleration now! 110 jet about right. also lubricate ur throttle cable!! when was the last time you did that??

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5 of 5 Yes July 28, 2025
taco eater : Taylor Ross from Athens, GA United States  
I nominate this for best bang for you buck mod on a stock MB5. As I understand, this is a repro of the MB80 carb (stock 18mm keihin). It’s a fantastic upgrade for the MB5 though, I can definitely feel a noticeable power boost throughout the rpm range, and am even maintaining speed up hills in 5th gear that always used to challenge me. The unnumbered main jet it comes with was way too small, it looks like a 100, I’m currently running a 120. I opted for this over the VM18/VM20 cause the mounts are the same size as the stock carb mounts, so you don’t have to further disturb a stock setup by replacing the intake manifold/airbox boot, it’s a direct swap. Other positives – a removable pilot jet (stock is pressed in) and an adjustable float.

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