Dalton Clutch Weights

Clutch weights, also called flyweights, are hinged arms inside the primary clutch that pivot outward as RPM rises. As they pivot, they push the sheaves together, forcing the belt into a higher ratio. The mass of the flyweights determines when the upshift occurs, and changing the mass shifts the CVT's operating point in the power band.

Heavier weights cause an earlier upshift at lower RPM, which suits larger tires or heavy loads. Lighter ones delay upshift and keep the engine in a higher RPM range, which suits machines with engine modifications. The goal is flyweights that keep the engine near peak output RPM through the clutching phase.

Incorrect flyweight mass puts the engine outside its optimal RPM range, so the belt runs at the wrong ratio for the load. That generates heat, causes slippage, and accelerates wear on belt and clutch components. It is one of the most common causes of belt failure that riders attribute to the belt itself.

Machines with larger tires benefit most because the added rotational load shifts the optimal RPM range in a direction that stock flyweights were not calibrated for. Riders at altitude also benefit, since air density affects engine output in ways that require a matching adjustment. Any meaningful change to engine output or drivetrain load is worth revisiting.

Stock flyweights are calibrated for factory tire size and engine output. Dalton flyweights are machine-specific and improve on that, particularly after tire changes or modifications. The Quick Adjust design gives you flexibility; stock weights do not, since you can re-tune for different situations without buying a new set.