HPI Baja 5b Series Aftermarket Steel Clutch Bell 5mm Bore SBJ613 by GPM  [SBJ613]

Aftermarket steel bell for Baja drivetrains

The SBJ613 is a steel 5mm-bore replacement clutch bell intended for the HPI Baja 5b, 5b Ss and 5T platforms cited in the product title. It is supplied as a single-piece set and comes with the retaining screw and lock nut required for pinion-mounted clutch arrangements.

The bell transmits torque between the motor pinion and clutch unit within the driveline. Steel construction is chosen for its wear characteristics when paired with compatible pinions. Confirm the 5mm internal bore matches your motor or pinion shaft before installing.

Fitment tips: remove the old bell, position SBJ613 onto the pinion or shaft so the 5mm bore seats properly, secure with the supplied screw and lock nut, and apply a modest torque to prevent loosening from vibration. Check thread engagement and measure runout to ensure smooth engagement with the spur gear and clutch shoes.

Choose the SBJ613 when replacing a worn steel bell or when matching gearing for HPI Baja 5b models, and prioritise correct alignment and secure fastening for consistent driveline performance.