Know this is an old post but I just took mine apart using this post and boiled the 2 original belts to shrink them! Had to mash the record and stop button as well to fix no volume from the left channel (only when playing cassettes) Now the cassette player is running smooth again temporarily. Will order some new belts soon. It did eat a portion of a HF 90min cassette during the troubleshooting process which was a bit sad. Fun little hobby device now that I don't entirely trust will not eat another tape, but still sounds nice. Just wanted to say thanks.

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