Z900 (Z1) Gasket Maintenance, Carburettor Maintenance, and More

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With an old machine like this, you never know what might have happened in the past, so let’s check carefully and proceed.

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The lower side is a bit rough. I imagined some negative scenarios—like it being loose and fixed with a backing washer—but it turned out fine.

 

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There are burrs flying around, so I’ll clean those up.

 

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It’s always necessary to understand how the standard seal is installed.
If you don’t check how well the seal is working, you’ll often have doubts when adjusting the steering.

 

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The tapered roller has no standard seal relief groove, so the standard seal appears to be ineffective. This installation state is questionable, but setting that aside—

 

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The lower side has a shaft outer diameter of 30 mm, the same as Suzuki, so I thought modern seals might work, but the outer diameter is too large.
Honda probably has something available.

 

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I thought modern seals might work on the upper side too, and I found one with good sealing performance, but as you can see in the image, it requires a stepped adjustment nut.

 

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This adjustment nut also has top and bottom sides with relief cuts, so if you stick your neck in carelessly, you’ll be in for a long night. We’ll go with standard.

 

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Measuring won’t improve performance, but I think it’s important to know these things.

 

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A steering that moves smoothly and effortlessly feels really good.

 

 

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