| Number | Name | Brand | Fit |
|---|
| B9-207A | 4.8 Ball End Cap (Hard) for BD8/9 | Yokomo | direct iYokomo's store lists it for BD11 |
| B11-B50A | Suspension Ball 5mm for BD11 | Yokomo | direct iYokomo's store lists it for BD11 |
| BD-BTCSA | Spring (with Ball 4) for Belt Tension Cam for BD7 / BD5 | Yokomo | direct iYokomo's store lists it for BD11 |