81 Honda express2 na50 automatic 2 speed

[Kingwalter]

I'm just curious if I can put a 24mm carburetor on my 81 Honda express2.

[motormike]

In answer to your question, Yes you can.
Going to a 24mm carb is far too much, imho.
If the cylinder is the stock 49cc, and you have no fancy hi-perf. pipe on it,
you will create tuning nightmares trying to get it to run right....imho.
I had great performance from a Mikuni TM24 flat-slide when mounted on an Aero 125cc.
Best research some of the forums and see what other people have found to work well on a stocker.
I'm thinking an 18mm sounds about right.

[Kingwalter]

Thanks bud. What size of carburetor would go on there with a stock motor.

[motormike]

Thanks bud. What size of carburetor would go on there with a stock motor.

I don't know. Easy for you to measure if you have an OEM carb.
Remove carb and find the number that is stamped on it, probably on the flange.