NCY Forged Secondary Sliding Sheave; Yamaha Zuma 125 2022+ master cylinders Precision lapped seats — perfect

Precision lapped seats — perfect 360° seal eliminates compression loss and erratic idle

Puncture-Proof: Solid honeycomb inner structure eliminates the risk of flats entirely

Jet sizes: #140 - #158 (even numbers)

Important: Charge the battery for at least 4–6 hours after adding acid and before first use

We highly recommend rebuilding your carb if you're doing the rest of the engine

NCY Forged Secondary Sliding Sheave; Yamaha Zuma 125 2022+ master cylinders Precision lapped seats — perfectThe NCY Forged Secondary Sliding Sheave is a high strength replacement for the 2022+ Yamaha Zuma 125, machined from forged aluminum to deliver superior rigidity and durability over the OEM cast unit. The secondary sliding sheave is the movable half of the driven pulley it controls belt clamping force on the output side of the CVT, directly influencing how the transmission responds to load and throttle input. A forged construction reduces flex under