Pinion Shaft Gear Standard Size 4-Spline for Harley 1937–1976 – Replaces OEM 24011-37

This standard size pinion shaft gear is designed for Harley-Davidson engines using a four-spline pinion shaft configuration.

The gear features a four-splined center and is used in the timing gear train to transmit motion from the pinion shaft to the cam gear set. Proper gear fit and spline engagement are critical for maintaining correct cam timing and preventing premature wear within the timing assembly.

Designed for Harley-Davidson Sportster models from 1957 through 1976, 45 cubic inch models from 1937 through 1952, and Big Twin models from 1937 through 1948, this gear is intended for stock-style timing gear applications used during engine service or rebuild work.

This part replaces Harley-Davidson OEM 24011-37 and is made in the USA! At Boomers Bike Shop, we stock internal engine components that fit correctly and are trusted for real vintage Harley-Davidson engine builds.

Fits Harley-Davidson Models:

Sportster: 1957–1976

45 Models: 1937–1952

Big Twin: 1937–1948

⚠️ Standard size. Verify spline count and timing gear compatibility before installation.