Description
Precision shim spacing is critical to proper valve train geometry and optimal engine performance. This OEM-style spacer shim ensures your valve clearances remain within specification, preventing costly valve float and maintaining consistent lift across the entire RPM range. Whether you’re rebuilding a race engine or fine-tuning an existing build, this .028″ shim delivers the accuracy you need without guesswork.
- Thickness: .028″
- Part Number: A-43290-91
- Material: OEM-specification steel
- Finish: Standard mill finish
- Manufacturing: Made in the U.S.A.
- Style: OEM replacement design
- Fitment: Most motorcycle applications
- Installation: Bolt-on, no modification





