Are 400 valve seats replaceable?

[coreyflipp]

Can you replace the valve seats on a 400ex head?

[rubbersdown]

no, you can recut them though

[dalejiw25]

Have you tried Lapping or reconditioning ???? I don't believe they can be replaced. At least I've never seen them that bad that they couldn't be repaired. I could be wrong ????

[honda400ex2003]

the guides are replacable but i am not sure about the rest of the guide area if that gets destroyed. steve

[coreyflipp]

No, it's the seats. They aren't worn, they have chunks takin out of them. This basket case has been problem after problem.

[bherriman]

The seats can be cut to get the proper angle back, but if there are "chunks" missing out of them I would say you are outta luck.

[ridein'red7]

if uhave or have acess and are a good welder get a tig and take the valves out and weld the holes or chunks the get the head done and the valves done