Thank you for your question and for asking for me to assist you.
As long as the bylaws
state that you can remove by a majority vote of the owners or an agreement in writing of the majority, you need more than 50% of the owners to write one letter stating they demand removal of the board member. One letter to the board with more than 50% of the owners signing is sufficient, since it is an agreement of more than 50% of the members to remove in accordance with the bylaws.
The letter should state that the below signed owners, who total greater than 50% such to constitute a majority as required by bylaws section X, have agreed that the following members should be removed. Then state that the agreement complies with the terms of the bylaw section by number.
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