GPM DSAV1052T HPI Savage 21 Delrin Main Gear 52T  [DSAV1052T]

Delrin Spur for Savage 21 Drivetrains

This replacement main spur is made for HPI Savage 21 scale models as an aftermarket Delrin component. The Delrin material provides a low-wear mating surface between the motor pinion and the gearbox, and the part is specified with a 52T tooth count matching DSAV1052T.

Fitting is straightforward on standard Savage 21 gearboxes: remove the gearbox cover, keep factory spacers and bearings, slide the Delrin spur onto the main shaft and set axial position and backlash relative to the motor pinion. Verify gear mesh at low throttle and turn the drivetrain by hand to confirm smooth engagement before refitting the cover. Always isolate batteries and follow safe power-off procedures while working on the drivetrain.

For tuning this Delrin main gear acts as an inexpensive wear surface that helps when testing gear ratios or swapping spurs frequently, since Delrin cuts down on metal-on-metal contact and eases maintenance. It is supplied as a single replacement part and intended for RC use on Savage 21 compatible platforms only.