Harley Davidson Yellow Pinion Shaft Drive Gear – Big Twin 1977–1989 (OEM 24042-93)

This Harley Davidson yellow pinion shaft drive gear is a direct replacement for worn or damaged factory units on classic Big Twin motors. Designed to meet original factory sizing, this gear measures 1.4745–1.4737 and replaces Harley-Davidson OEM 24042-93.

Built for proper engagement and long-term durability, this pinion shaft drive gear is the correct choice when rebuilding or servicing vintage Big Twin engines from 1977–1989. Whether you’re fixing a noisy drivetrain or doing a full motor teardown, this gear keeps everything meshing the way Harley intended.

If you’re restoring or maintaining an old-school Big Twin, this is the right part to keep it moving forward—no shortcuts, no guesswork.

Fitment

Harley-Davidson Big Twin models

1977–1989

Replaces Harley-Davidson OEM 24042-93

Gear size: 1.4745–1.4737