Kyosho FA631 Steel Spool Cup for FAZER D2  [KY-FA631]

FAZER D2 Spool Cup - Steel Replacement

This is an RC-grade steel spool cup produced to suit the FAZER D2 chassis kit, supplied as a direct spare for the spool assembly. The FZD2 code indicates the exact position and function within the FAZER D2 drivetrain layout.

The part uses steel for a durable mating face where the spool contacts adjacent bearings and differential components. During periodic inspections this cup is a typical wear item to check and replace if the original shows abrasion or poor seating.

Fitting is quick for those familiar with on-road builds: strip the relevant diff or spool module, examine bearings and seals, swap in the new cup while preserving spacer and fastener orientation, then confirm unhindered rotation before completing reassembly. No specialist tools beyond standard hex drivers are normally required.

Functionally this cup is a structural spare rather than a tuning accessory; consistent fit and minimal slop assist steady spool engagement and predictable behaviour in drift setups. Modelers commonly verify bearing seating and mating surfaces when adjusting toe and corner balance.