This Delrin 46-tooth main gear is a direct swap for Kyosho Inferno MP7.5 owners who want a single spare spur for routine drivetrain maintenance or setup changes. It emphasises consistent mesh and predictable wear behaviour associated with Delrin, and is supplied as 1 pcs ready to fit the stock gearbox layout.
Fitting is a simple replacement of the spur assembly inside the gearbox; verify gear mesh and backlash when reassembling and rotate the drivetrain by hand to check for smooth engagement before running the motor. Tuners use this gear to preserve drivetrain reliability and to dial in engagement when altering pinion ratios or spur position.
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