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  • brentjustin123
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Carburettor was created by brentjustin123

Has anyone fitted a 34mm mikuni carburettor to a Yamaha Dt175mx? Any good?
17 Jul 2023 09:40 #1

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Replied by Ht1kid on topic Carburettor

Greetings from TennesseeĀ 

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17 Jul 2023 15:01 #2

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Replied by RT325 on topic Carburettor

Welcome from NZ. As much as i love ideas like that, i think its overkill on 'that' motor which as far as i know is only pretty much a DT175 so not ported enough to get the advantage. Not sure you could find a manifold big enough with 'that' bolt pattern to do the job. Plus would the bigger carb sit up off the deck--might sit on the case as physically taller--deeper.
I had 'of all things' a TY50 years ago & went 'way big' in the carb but the air flow was so low over the needle jet it wouldn't suck the fuel up the main jet good enough on full throttle no matter how big i went. In hind sight probably the slide needle was restricting it. Silly idea that sounded good in theory, 35 years ago.
17 Jul 2023 16:46 #3

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Replied by MarkT on topic Carburettor

Biggest carb that fits the original manifolds is a rare "small body" 30 that was used on a few mid 70's 125 MX bikes. 34 (and commonly found 30's) are a larger body size and will not fit.

And as was said, not worth it. The 24 is plenty big enough... I've tried a 28 from RD350 and if anything it hurt throttle response... no measurable performance increase. Even though I spent a lot of time jetting, top speed was down a couple MPH with a 28.
1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250
The following user(s) Liked this Post: RT325, asco, Snglsmkr, Ht1kid, msavitt
17 Jul 2023 17:26 #4

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