Coolster 125cc ATV Carb Question - 22mm to 26mm

[Douglass]

I currently have an aftermarket 22mm carb on the atv, and am looking into installing a 26mm Carb similar to what comes on the 125cc pit bikes. I was considering buying a spare intake manifold, and doing a gasket match to the manifold on the carb side so it will flow into the smaller diameter better. I'm hoping to improve performance, and like that I will be able to use the mikuni carb & jets. Assuming there is not clearance issues, any downside to this?

I am not looking to gain power, but more with improving idle, and heavy throttle performance.

This is what I have now.

https://www.amazon.com/Carburetor-TaoTao-Kazuma-110cc-125cc/dp/B008IK7TSA/ref=sr_1_4?s=automotive&ie=UTF8&qid=1523893316&sr=1-4&keywords=pz20+carburetor

This is what I am considering

https://www.amazon.com/MIKUNI-VM22-Carburetor-Dirtbike-125CC/dp/B0176TACDC/ref=sr_1_1?s=automotive&ie=UTF8&qid=1523893369&sr=1-1&keywords=vm22+mikuni

This is a different design that looks to be the same as what is on the Tao Tao, and Apollo Units. I am considering this as an alternate to the 26mm.

https://www.amazon.com/gp/product/B073SVL11N/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

[FLASHLIGHTBOY]

I think the mikuni is the better carb,, but are you really have trouble with it now... they must be cheaper than AMAZON... thre was a post saying about the #40 idle jet helping with the idle speed... since on some NEW TAOTAO EPA carbs.. the needle can not be adjusted to idle good,,, if you have a spare carb you could switch or change it out,...... the carb you have ,,stock carb... Is it and EPA CARB... non removable screws??? I think the main thing .. do you want to spend money and the problem you want to solve??