If you know exactly which belts fit your boxes, how about adding to this thread? Let's make this a reference thread that we can all add to and all benefit from. As this grows it will surely reduce search time for this often critical information.
I'll start with this one and add a few more later:
Pioneer SK-71
FRX 11.7 (11.7" inner circumfrence, W= 0.15", T=.031")
SCX 4.0 (4" x .046" square belt)
SCX 4.3 (4.3" x 0.46" square belt)
SCY 6.1 (6.1" x .031" square belt)
(SK-71 has extra belts for tape memory feature, but main belts should be same for SK-61 & SK-91 and maybe even a few other Pioneer models)
I'll start with this one and add a few more later:
Pioneer SK-71
FRX 11.7 (11.7" inner circumfrence, W= 0.15", T=.031")
SCX 4.0 (4" x .046" square belt)
SCX 4.3 (4.3" x 0.46" square belt)
SCY 6.1 (6.1" x .031" square belt)
(SK-71 has extra belts for tape memory feature, but main belts should be same for SK-61 & SK-91 and maybe even a few other Pioneer models)