Carb - How big is too big?

[drawkward]

So my dad has had this Mikuni carb sitting around for a while (bought it, and couldn't use it for some reason). He said it was a 28mm. I just did some measurements. Turns out the inlet is ~53mm and the outlet is just about 32mm. This thing is pretty massive, lol. I doubt I can use it, but hey... can't hurt asking. Pics below.

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Edit: the slide was jammed and the needle jet was bent at the end...? Fixed that. Went to check out the jet size, got all the bolts off then realized the bottom nut is to change the main jet on the fly. Nice feature. Oh and by the way, it's jetted with a 200 main.

[Reign]

That thing is a beast! I'm not sure how big is too big, but to run that on even a BBK, you'd have to turn it crazy amounts of lean and even still it would probably be too rich

[90GTVert]

How big is too big? That big is too big. lol

Most folks use 19mm-21mm on the average 70cc kit.

[stepthrutuner]

It probably wouldn't be worth messing with. Such a big carb on a mild cyl. is hard to set up. Usually you find that after you get it jetted about right it runs good up to around 1/2 throttle and twisting the throttle open further gains you no more speed. You need a set up for 13,000-14,000 rpm to make use of a carb bore this big.... and that is a lot of work and expense and short life between rebuilds and terrible gas mileage.... like sub econobox.

[drawkward]

lol that's what I thought. eBay, here I come!