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XR400 Competition Guide photo's.

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This a guide I got with my XR400, this is what the dealer did to it before i bought it.

Its what all of you have been trying to do and talking about!

Check out page 5 with the restricted inlet manifold! Is it like that only in australia? or are you all riding it around with the tiny inlet manifold on it?

Oh well check it out!

XR400_Derestriction_Guide_01.JPG

XR400_Derestriction_Guide_02.JPG

XR400_Derestriction_Guide_03.JPG

XR400_Derestriction_Guide_04.JPG

XR400_Derestriction_Guide_05.JPG

XR400_Derestriction_Guide_06.JPG

XR400_Derestriction_Guide_07.JPG

XR400_Derestriction_Guide_08.JPG

XR400_Derestriction_Guide_09.JPG

XR400_Derestriction_Guide_10.JPG

XR400_Derestriction_Guide_11.JPG

XR400_Derestriction_Guide_12.JPG

XR400_Derestriction_Guide_13.JPG

XR400_Derestriction_Guide_15.JPG

XR400_Derestriction_Guide_14.JPG

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They are geared for onroad use there

lucky sob's also get street legal WR450's

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Check out page 5 with the restricted inlet manifold! Is it like that only in australia? or are you all riding it around with the tiny inlet manifold on it?

Oh well check it out!

XR400_Derestriction_Guide_06.JPG

Does anyone have an answer to his question? Do we have the restrictor on North American bikes too? (Save me looking...)

If so, how to remove? :cry:

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I dont think the xr400 have that restricted manifold inlet. The xr650r does for sure I know.

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Its EASY to take the inlet manifold off!

All you have to do is undo to 3 little bolts holding the manifold to the head then get a philips srewdriver and undo the clamp that holds it on to the carby then kind of twist it side ways and pull it out!

just make sure when u put it back in that you have the big O ring in place that seals it on to the head's inlet port.

use some grese or somthen to keep it in place.

It is quite possible that the bikes in America dont have that restricted carby! Mabey its just the tight ass australian polution laws.

these are the pics of my old restricted inlet manifold

XR400_misc_05.JPG

XR400_misc_04.JPG

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My 400 didnt have it. Possible it was removed before I got to it though.

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Q: Are there any other intake restrictors?

A: Yes, on some bikes originally for Australia and shipped to some African

countries and "grey-market" imports found in the UK. On these "U" bikes,

there is a restrictor that is molded into the part that goes between the

carburettor and the cylinder head. According to the information I have,

the "U" (Australia) models had the restricted intake from 1996 to 2000

inclusive. The unrestricted part# is 16211-KCY-670, and the restricted

part# is 16211-KCY-650. People have indicated that the restriction is

molded into the bakelite like material but can be removed with care by

scraping with a sharp knife or using a rotary tool. If you have this

intake restrictor, then you also have a super small main jet (#60) that

needs to be replaced too.

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Manifold restrictor is not on the U.S. models. "Chain Cover" keeps the chain away from the tire for road use. I know the old XL models had it and might still.

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