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Just got my 2020 TT250, and got right to work on changes after the first 25 miles.
I put a JT sprockets 45 on the rear, and used NO spacers. Chain and wheel align perfectly!
I believe the stock 50 T sprocket with the “dish” is actually OUT of alignment.
Did a quick heat gun hit on the chain guard to open it up a bit as well, and did need to lightly sand out the inner hub circle on the sprocket - just enough to remove the paint.
Great upgrade, fits perfect, all aligned.
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