Balance shafts counter the inherent vibrations produced by inline and V-configuration engines, especially in larger-displacement or longer-stroke designs. By rotating weighted shafts at twice the crankshaft speed, they cancel out second-order harmonic forces that would otherwise create driver-perceptible buzz and long-term wear on engine mounts and accessories.

Our collection includes replacement balance shaft assemblies, individual shafts, and service kits designed to restore factory-smooth operation. When a balance shaft bearing wears or a chain tensioner fails, you'll notice increased noise and vibration—often mistaken for a driveline issue. Addressing it early protects other rotating components.

• What to look for: check for shaft straightness, bearing journal wear, and proper timing marks before installation.
• Common replacement triggers: cold-start rattle, excessive engine vibration at specific RPM, or visible scoring on removed shafts.
• Installation tip: many shafts require precise timing alignment with the crankshaft; a service manual is essential.

Browse the options below to find the exact shaft or kit for your engine. Every part is built to meet or exceed original specifications, so you can count on quiet, reliable performance.