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TOPIC: IT400 replacement carb suggestions

IT400 replacement carb suggestions 14 May 2019 14:18 #1

  • TwoHcrew
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I bought a 1978 IT400 with a pretty corroded carburetor. I need a new one, any suggestions on size and type? This is going to be mainly ridden on the highways.


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74' dt360 71'dt1 73'cl350 R5,rd350,rd400 75'triumph t140 09yzf450 2012drz400
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IT400 replacement carb suggestions 14 May 2019 15:26 #2

  • Bigdog302
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The only thing I would suggest is getting a carb in good shape from a 1978 IT400 on Ebay then clean and or rebuild it. avoid the Chinese knockoff carbs like the plaque.

I bought a carb off Ebay and it was for a 1976 IT400C and in my case it needed nothing! I took it apart and inspected it then put it back together and installed it on my 1975 Super DT400 project bike which has a 1975 MX400B top end and piston installed. it turned out to be perfectly jetted on my combo of parts.

another case was buying a carb for my 1971 RT1B, it needed minor work like cleaning and installing a needle and seat but it runs perfectly once I got it sorted out. The carb I got came from a 1970 RT1 Enduro which is the 275 stock 32mm type.

it has the E1 stamped on the flange indicating it is a early 1970 carb.

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2 1968 DT1s,1970 RT1M,1970 DT1C,1971 RT1B,1971 Honda Z50K2,1974 DT100A,1974 Honda MT250,2 1975 DT400Bs,1975 Honda CR250M1,1978 DT175E,1979 Honda CR250R.
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Last Edit: by Bigdog302.

IT400 replacement carb suggestions 14 May 2019 18:23 #3

  • Mothersbaugh
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Rather than spending money and shipping for something that may need cleaning itself, why not clean yours three or four times first. Often even the worst corrosion will come clean. Chances are good it's not so much corrosion as gas deposits, ethanol deposits.

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