Small changes yield big results—this ultra-thin .005" shim is crafted to nudge valve springs into ideal alignment, slashing inefficiencies that rob your kart of speed.

Benefits at a glance:

• Enhances low-end torque for quicker starts
• Preserves OEM integrity in stock rebuilds
• Streamlines valve train for quieter runs

SKU JF168-1246-5 empowers precise organization in your pit setup, letting you focus on dominating the race rather than troubleshooting engine quirks.

Frequently Asked Questions

Q: Why would I use a .005" shim instead of a thicker one?

A: A .005" shim is ideal for fine-tuning valve spring pressure when you need a very subtle adjustment to correct coil bind or to slightly increase seat pressure without over-stressing the valve train components.

Q: How do I know if my engine needs a valve spring shim?

A: You typically use shims during a valve train rebuild or when checking spring height. If your installed height is slightly out of spec or you are experiencing valve float at high RPMs, adding a shim can help restore the necessary spring tension.

Q: Can I stack multiple valve spring shims?

A: While it is possible to stack shims, it is generally recommended to use the single most appropriate thickness to achieve your target spring height. Always ensure the shim sits flat and centered in the spring pocket to prevent misalignment.

Q: Is this shim compatible with standard 196cc Clone engines?

A: Yes, this shim is designed specifically for the Ducar Clone and similar 196cc racing kart engines to ensure precise valve train geometry.

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