Yokomo YOKBDBTCS - BD5 Belt Tension Cam Spring  [YOKBDBTCS]

BD5 belt tension cam spring

The Yokomo YOKBDBTCS BD5 belt tension cam spring is an aftermarket replacement spring designed specifically for the BD5 belt tension cam assembly on 1/10 scale touring car setups. Its role is to provide a predictable preload to the cam, helping maintain consistent belt tension and improving repeatability when adjusting drivetrain alignment.

Installation is straightforward: remove the belt tension cam from the BD5 assembly, swap the original spring for this unit, and reassemble while checking belt tension through the full suspension travel. Use incremental adjustments and test runs to confirm the cam returns reliably and the belt runs true without binding.

Tuning notes: this spring affects the cam return force and thus how the belt reacts to load changes. Small changes in preload can change drivetrain feel and noise; adjust in small steps and verify on the track. The spring is intended for RC-scale use only and should be handled with standard hobby tools.