Jetting for Mikuni VM18

Hey quick question. My stock carb on my 1978 Honda express just isn’t working well after cleaning and tuning. My question is if I put a Mikuni vm 18 will work with the stock cylinder. Also what jets would work for stock. Doing research people have said 110-120 range but that is with an upgraded 70cc kit. It has to be lower for stock right?

Thanks!

Re: Jetting for Mikuni VM18

Jack Rutherford /

Stock Honda express - 55-65 range.

70cc express with performance pipe - 75-80 range. (edited)

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