200x aftermarket carburetor identification

[hippyplz]

I picked up this 200x carburetor setup a few years back off eBay. The guy was parting out the x and didn't know anything about it, except he did say it would start. I had a scan of a advertisement that showed this setup but the computer crashed and I haven't been able to find it again. I didn't end up using or even trying this out it ended up on the shelf and at some point I remove the floats and now need to find some replacements. The carb is a 30mm MIC mikuni kogyo, I'm not very familiar with this carburetor and it looks like there's been a few variations and I'm not having any luck finding the right floats. Any of you guy's know this carb and can point me in the right direction? Also I'd love to put a name on the setup, pretty sure it was a smaller company. The unique part about it is it set up to run the factory air box. It had a pretty standard short aftermarket intake, not 100% that it's the one in the pic, rubber hose the the carb with this aluminum adapter pressed in the airbox side. It's a machined piece that goes in pretty far maybe 1/2 from the slide. Then there's another small aluminum spacer that goes between that and the airbox to fill in for the shorter intake. https://uploads.tapatalk-cdn.com/20190812/5e445f6be3f88d11f47c1c4587f400f0.jpghttps://uploads.tapatalk-cdn.com/20190812/8573c13de1dcfc872f966ccc7e6c64d0.jpghttps://uploads.tapatalk-cdn.com/20190812/88ac1e5794f49836b5dc55391b1054c1.jpghttps://uploads.tapatalk-cdn.com/20190812/8a9bbdccc2cbbf01b6c87365ef22c679.jpghttps://uploads.tapatalk-cdn.com/20190812/b255a221ad26085cd9d8c41b33655be1.jpg

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[deathman53]

I seen that adapter somewhere. I think I have one, I always wondered what it fit. I got it with a 200x motor.

[yaegerb]

I am willing to bet shortline10 knows what it is. Interesting piece for sure.

[ps2fixer]

In the first photo, can you read what is on the raised area on the carb body. It's probably the model code for the carb. Just for an example, the 85 ATC350X carb is a QA05A and 86 ATC350X is QA10A. I suspect if you can figure out what machine the carb came from by the identification mark, you'd be able to find the float and such pretty easy.

[hippyplz]

It shows w4 5 and I'm not sure what that last character is. I found some other post that reference the model number being there but these numbers don't seem to match up with anything.https://uploads.tapatalk-cdn.com/20190814/26ebd898212ac56c7b3d6f1be0a7155d.jpg

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[ironchop]

You might email Sudco and ask them. They probably have the largest comprehensive small engine carb catalog of anywhere.

I know they offer built carbs for special applications, so that would be the first people I would call

DG did one for the 200X but I'm pretty sure it was a Keihin, not Mikuni

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[shortline10]

The air box flange is obviously custom made , probably so it would match up to the factory 200x air box boot .
As for the carburetor my best guess was it’s off a 1980s Yamaha DT175 dirt bike .
Intake manifold is definitely a correct aftermarket piece and hard to come by .
If you plan on running this 30mm on a 200x in needs to be highly modified , stroker , high compression ETC.

[shortline10]

The floats should be just std for the vm style mikunis.
Their 2 of them and a little plastic cap would hold them from falling out of the bowl .

[ps2fixer]

Poked around a little and found atleast some info. From what I could find, the W4 marking is common on the carbs, the number under it seems to signal what model it is, for example a VM26-606 has 606 stamped under the W4. The page below has some part diagrams and such, they only show one model for 30mm (VM30). Using google auto complete to try to find possible matching model numbers a VM24-512 came up, but your post says it's 30mm.

https://web.archive.org/web/20150208044107/http://www.sudco.com/mikuni2.html#VM

Also for the random VM24-512 search, Jetsrus has parts for them it seems like. Not sure how universal the floats are but maybe they would work from this carb?

https://www.jetsrus.com/carburetor/carb_mikuni_VM24-512_carb_exploded_view_parts.html

They don't have many carb models for the VM series, but both the VM24-512 and VM26-606 uses the same floats.

https://www.jetsrus.com/individual_parts/007_255_su.html

[hippyplz]

Awesome, thanks guys. I thought it was a VM from the start, but when I went to order the floats there wasn't much on a vm30 and so many different variations and knockoffs that I wasn't for sure. A couple guys are interested in it and I didn't want to give out the wrong information. Guy here at work is pretty sure he has the same carb on a old kdx200. It's a cool piece I've always wanted to run it, but it's too big for my x. I was always curious about using the airbox with a motor that could use a carb this big.

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