Secure your rocker adjustments with the CL-1090 extra fine jam nut, designed for precise locking in clone engines.

• Fine Threads: Enable exact lash tuning without slippage.
• Matches JF168-1270EFKIT specs for compatibility.
• Sold individually for on-demand fixes.

Keeps valvetrain tight, boosting reliability. SKU: CL-1090.

Frequently Asked Questions

Q: Why should I use an extra fine thread jam nut for my rocker arm?

A: Extra fine threads allow for much more precise lash adjustments compared to standard coarse threads. This precision is critical in high-performance clone engines to ensure your valve lash stays exactly where you set it, preventing slippage during high-RPM racing.

Q: Is this jam nut compatible with stock clone rocker arms?

A: Yes, the CL-1090 is designed to match the specifications of the JF168-1270EFKIT and is a direct replacement for standard clone valvetrain setups requiring fine-thread hardware.

Q: How tight should I torque the jam nut?

A: You should tighten the jam nut firmly against the rocker arm adjuster to lock it in place. Be careful not to overtighten, as this can strip the threads or damage the adjuster stud. Always double-check your lash clearance after locking the nut to ensure the setting didn't shift during tightening.

Q: Should I replace my jam nuts during a valve train rebuild?

A: It is highly recommended. Over time, the threads on jam nuts can wear or stretch, which may lead to the nut backing off under engine vibration. Replacing them ensures your valvetrain remains secure and reliable throughout the race season.

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