The cause of poor loading performance from the CPC464 is often due to stretching and wear of the tape mechanism drive belt.
The old belts perished over time, particularly when stood unused for many years when they would often develop a "kink" where the belt rested unmoved over the capstan. This kink becomes a permanent feature in the belt causing it to jump when the drive is used again.
These square section belts are newly made and are as close as possible to the size to the originals, but made from modern, more resilient materials. They have been tested extensively with the CPC 464 and work perfectly.
Please note - these belts ARE NOT suitable for the CPC 464 Plus model.