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V968231

Will a YZ400 Carb go staight onto a WR400F

8 posts in this topic

Can you kind people tell me if a 1998 YZ400 Carburettor will fit straight onto a 1998 WR400F?

Will I need any additional bits?

Will I need to disconnect anything such as the Throttle Position Sensor?

Is ther any reason why I should not fit this carb to a WR engine :thumbsup:

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The yz carb will fit perfectly.

The wr carb has an aircut valve for EPA purposes. Many guys remove it anyway.

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can u pls tell me where is the aircut off valve& how to close it?

thanks.

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the acv on the old 98 and 99 carbs was called the octopus. you need to remove it.

What is the Octopus and where can I find it?

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Its a mess of pipes on the left hand side of the carb. Pull em all off and block the remaining holes with a bung.

Hook up the hot start to the tube on the cylindder head

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check out "www.thumperfaq.com" or this forum. You should be able to find all of the info you need. Also keep in mind that a number of posts have indicated that you need to change your pilot air jet when de-octopussing" the carb.

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