32mm Mikuni vs 34mm Mikuni? (Carb problems)

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mwoj
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32mm Mikuni vs 34mm Mikuni? (Carb problems)

Post by mwoj »

So I have a 1985 KDX 200. Currently in the process of restoring it. According to previous owner the original 32mm Mikuni Carb (VM32SS) was somehow destroyed. in a crash maybe? And he replaced it with a carb from a 1986 KDX 200. And it never ran good since then. Luckily my Clymers manual shows me proper carbs for both years, and the proper specs/jets of each carb. So if the previous owner was correct, he installed a VM34SS, which is a 34mm Mikuni. The correct jetting of this carb is a 300 main, and a 35 pilot. However, the correct jetting of the original 32mm carb is 260 main, and 40 pilot.

Should I install the correct jetting of the 32mm carb into the 34mm carb? Or should I install the correct jetting of the 34mm (considering I don't know what jets are currently in it). Or should I buy a 32mm Mikuni off of ebay (slightly different model number) and install the correct jets into that?
jjavaman
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Re: 32mm Mikuni vs 34mm Mikuni? (Carb problems)

Post by jjavaman »

I'd install the jets the 34 calls for and go from there.
97-220 with a PC pipe. 2015- RB carb and head mod
cornishwrecker220
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32mm Mikuni vs 34mm Mikuni? (Carb problems)

Post by cornishwrecker220 »

Check that the slide ID cutaway & needle ID are the same in the 32mm as they are in the 34mm ....
Run the stock jets , needle & slide that are in the 32mm & use them in the 34mm & go from there....given the age of theses carbs you may find that they may need replacing with new due to general age, wear & tear..... You can still buy new carbs so it shouldn't be a problem just a matter of cost.
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