REPLACEMENT SCREW PACK - QSC CLUTCHING CANAM PRIMARY CLUTCH

The QSC Weight Adjustment Screw Pack is a precision hardware kit designed for fine-tuning the shift geometry of your QSC clutch weights. Whether you are running the R2-5 weights in a Polaris or the Torque Lock system in a Can-Am, these fasteners allow you to add or subtract mass from the shift arms to perfectly dial in your engine's peak operating RPM.

In clutching, even a few grams of difference can significantly change how the primary clutch "grabs" the belt and how high the engine revs under full throttle.

Tuning & Performance Flexibility

This screw pack is an essential tool for riders whose vehicle setup is frequently evolving. It allows you to recalibrate your clutching without purchasing an entirely new weight kit when you make the following changes:

• Tire Size Upgrades: If you move to a larger, heavier tire, you may need to lighten the weights to allow the engine to reach its powerband more easily.

• Elevation Changes: Riding at high altitudes reduces engine horsepower; subtracting weight helps maintain the correct shift RPM in thinner air.

• Power Adders: If you add an EVP Power Flash or high-flow exhaust, adding weight can help harness the extra torque and prevent the engine from hitting the rev limiter.

• Sand vs. Hard Pack: Deep sand creates massive drag on the drivetrain; adjusting the tip-weight of your shift arms can help the clutches "back-shift" faster in high-load conditions.

Kit Features

• High-Strength Fasteners: Designed to withstand the extreme centrifugal forces and vibrations inside the primary clutch housing.

• Varying Mass Options: Includes screws of different lengths/weights to allow for granular adjustments (often in 1-gram or 2-gram increments).

• Application Specific: Thread-pitched specifically for QSC shift arms to ensure a secure, "set-it-and-forget-it" fit.

Basic Tuning Guide

Technical Note: When adjusting your shift arms, it is critical to ensure that all three weights are loaded with the exact same hardware configuration. An imbalanced clutch will cause severe vibration, leading to premature bearing failure or damage to the crankshaft.

Pro Tip: Always use a small amount of blue (medium) thread locker on these adjustment screws. While the centrifugal force generally holds them in place, the constant "cycling" of the clutch can cause loose hardware to back out over time.

Would you like the specific base-weight recommendations for your current tire size and elevation?