Yes, they did, which is why the question was asked. However a quick poke about on the internet reveals a couple of '99 bikes with 1" threaded headsets. But a quick measure with some calipers will tell you for sure what you need.
@Howard started
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Yes, they did, which is why the question was asked. However a quick poke about on the internet reveals a couple of '99 bikes with 1" threaded headsets. But a quick measure with some calipers will tell you for sure what you need.