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Makotosun

Flat slide carb conversion on 75 MX400B

  • thumperstew
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Flat slide carb conversion on 75 MX400B was created by thumperstew

Recently got a 75 MX400B. It sat easily 20 years. Working on the fouled stock 38mm Mikuni carb but thought about a flat slide carb. Mikuni TM/TMX or Keihin PWK.  What's some thoughts on the conversion. The engine is going in a Champion frame, with low pipe/ oversize air filter.  Not a racer though. Thanks
09 Apr 2024 12:24 #1

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Replied by LongStride on topic Flat slide carb conversion on 75 MX400B

PWK gets my vote over the TM series, should be able to make smooth power with the kehin 
2ET703 Central Texas
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10 Apr 2024 04:17 #2

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Replied by turbodan on topic Flat slide carb conversion on 75 MX400B

You could go either way. The PWK seems to be more responsive. The TMX is easier to get jetted crisply and makes better top end on some bikes.

I've always used PWK's on mine, getting them to run crisply at a cruise has always been a challenge.
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10 Apr 2024 07:45 #3

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