I have asked before - why not use a part designed for the TDM?
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This item will need various changes - big centre hole, six holes to bolt to hub. Can you do this, accurately?
Also the item is in Aluminium which will wear rapidly unless it is hardened.
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There is a steel JT sprocket available for less cost than your item:-
https://www.motomoto24.com/rear-sprocket...tr300.html
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OK it is 39 teeth, but perhaps a 37 cannot be made without weakening the supporting material too much. The dimensions are for the JTR 300 series sprockets, which apparently also fit a range of Honda bikes! I can't find a JTR 300.37
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I note you do not have a TDM yet according to your avatar caption.