Jims Pinion Gear 24046-78 for Big Twin 1977-1989

Jims Pinion Gear 24046-78 for Big Twin 1977-1989

$381.76
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Jims Pinion Gear 24046-78 for Big Twin 1977-1989

Jims Pinion Gear 24046-78 for Big Twin 1977-1989

$381.76

Ensure proper valvetrain alignment and quiet engine performance with this precision Jims pinion gear. Engineered specifically for Harley-Davidson Big Twin models, it replaces OEM part number 24046-78 to maintain exact gear lash with your cam drive system.

Proper pinion gear sizing eliminates excessive valvetrain noise and premature wear. Sized at 1.4710 to 1.4715 inches and colour-coded black, this replacement ensures reliable operation and long service life in high-demand engine builds.

Key Features

Brand Jims
MPN 24046-78
OEM Replacement 24046-78
Color Code Black
Pinion Gear Size 1.4710 – 1.4715 in
Required Tool JM-1110
Suggested Hardware SS33-4244 Pinion Gear Nut
Compatibility Big Twin 1977-1989
Product Weight 0.3 kg

Highlights

  • Replaces OEM part number 24046-78
  • Color-coded Black with gear size 1.4710 – 1.4715 in
  • Optimised for quiet, reliable cam gear engagement
  • Compatible with Big Twin 1977–1989 engines

Compatibility

Fits Harley-Davidson Big Twin models manufactured between 1977 and 1989.

Frequently asked questions

Which engine models does this pinion gear fit?

This pinion gear is designed to fit Big Twin models from 1977 through 1989.

What OEM part number does this gear replace?

It directly replaces OEM part number 24046-78.

What is the gear size for the Black color code?

The Black color code corresponds to a pinion gear size of 1.4710 to 1.4715 inches.

What tool is recommended to determine the correct pinion gear size?

Tool number JM-1110 is used to measure and select the correct pinion gear size.

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