If your roller weights are in good shape, just reinstall them.
The same can be said of your belt. If it's OK good shape, reinstall it. If you need to replace it, use ONLY a factory OEM belt. They simply are the best belt...period.
The same can be said of your belt. If it's OK good shape, reinstall it. If you need to replace it, use ONLY a factory OEM belt. They simply are the best belt...period.