S&S Cycle 33-4203 Breather Gear Spacer Shim +.140" Steel

The S&S Cycle 33-4203 is a precision-machined breather gear spacer shim measuring +.140" thick, designed for Harley-Davidson big twin engines. This steel shim measures .325" x .740" x .130" and is used to properly set breather gear spacing during engine assembly or rebuilds.

Key Features:

• Precision +.140" thickness for accurate breather gear spacing
• Steel construction for durability and dimensional stability
• OEM cross-reference compatibility with Harley-Davidson part numbers 25322-82 and 25327-79
• Essential component for proper oil pump and breather system timing
• Sold individually for custom spacing requirements

Breather gear shims are critical components in vintage and Evolution-era Harley-Davidson big twin engines, ensuring proper crankcase ventilation and oil scavenging. The correct shim thickness is essential for achieving optimal breather gear timing and preventing engine oil leaks. This shim can be used individually or as part of a complete breather gear service when rebuilding or upgrading your engine's lubrication system.