NCY CVT transmission power kit for Yamaha Zuma 125 2022+ flat lay showing black anodized star clutch bell, yellow CVT spring with boss sleeve, turbine-cut polished aluminum variator drive face, secondary sheave, 3-shoe clutch assembly, and three sets of NCY roller weights labeled 7g 8g and 9g NCY CVT transmission power kit for Yamaha Zuma 125 2022+ flat lay showing black anodized star clutch bell, yellow CVT spring with boss sleeve, turbine-cut polished aluminum variator drive face, secondary sheave, 3-shoe clutch assembly, and three sets of NCY roller weights labeled 7g 8g and 9g
Dynojet dyno chart comparing NCY kit 1200-1284 (blue, 10.24ps at 50.53 km/h) vs stock (red, 9.39ps at 85.35 km/h) on Yamaha Zuma 125 showing earlier and higher peak power with NCY 8g rollers and 1500 RPM spring Dynojet dyno chart comparing NCY kit 1200-1284 (blue, 10.24ps at 50.53 km/h) vs stock (red, 9.39ps at 85.35 km/h) on Yamaha Zuma 125 showing earlier and higher peak power with NCY 8g rollers and 1500 RPM spring
NCY CVT transmission power kit for Yamaha Zuma 125 2022+ flat lay showing black anodized star clutch bell, yellow CVT spring with boss sleeve, turbine-cut polished aluminum variator drive face, secondary sheave, 3-shoe clutch assembly, and three sets of NCY roller weights labeled 7g 8g and 9g
Dynojet dyno chart comparing NCY kit 1200-1284 (blue, 10.24ps at 50.53 km/h) vs stock (red, 9.39ps at 85.35 km/h) on Yamaha Zuma 125 showing earlier and higher peak power with NCY 8g rollers and 1500 RPM spring

NCY

NCY Transmission Power Kit - Yamaha Zuma 125 2022+

SKU 1200-1284
$475.00
Shipping calculated at checkout.
Description

The NCY Transmission Power Kit for the Yamaha Zuma 125 (2022+) is a complete CVT overhaul solution engineered for riders who demand more from their drivetrain. Designed as a bolt-in performance upgrade, this kit replaces every critical component in the variator-to-clutch circuit with NCY's precision-manufactured parts — giving you a tighter, more responsive power delivery from idle to top speed.

At the heart of the kit is the NCY Variator Kit (1200-1286), paired with the NCY Secondary Sheave (1200-1288) and a 1500 RPM NCY CVT Spring (1200-1291) for a firm, predictable engagement point. The drivetrain is completed by the NCY Star Clutch Bell (1200-1289) and NCY Clutch (1200-1290), ensuring consistent power transfer and reduced heat buildup under sustained load.

To dial in performance for your riding style, the kit includes three sets of roller weights — 7g, 8g, and 9g — so you can tune shift behavior whether you're optimizing for low-end torque, top-end speed, or a balanced street setup. Swap weights in minutes; no special tools required.

Dyno-tested: NCY kit with 8g rollers and 1500 RPM spring achieved 10.24ps at 50.53 km/h vs. stock 9.39ps at 85.35 km/h — more power delivered earlier in the RPM range.

Kit Contents

  • NCY Variator Kit (1200-1286) — turbine-cut polished aluminum drive face
  • NCY Secondary Sheave / Movable Face (1200-1288)
  • NCY CVT Spring 1500 RPM (1200-1291)
  • NCY Star Clutch Bell (1200-1289) — black anodized aluminum
  • NCY Clutch / 3-Shoe Clutch Assembly (1200-1290)
  • Three roller weight sets: 7g, 8g, and 9g (6 rollers per set)

 

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Product Diagrams
Features
  • Complete CVT overhaul kit — variator, sheave, spring, clutch bell, and clutch assembly
  • Dyno-proven: 10.24ps vs stock 9.39ps with 8g rollers and 1500 RPM spring
  • Three roller weight sets (7g, 8g, 9g) for custom shift curve tuning
  • 1500 RPM CVT spring for firm, predictable engagement point
  • Black anodized star clutch bell and turbine-cut polished aluminum variator drive face
Specifications

Fitment: Yamaha Zuma 125 2022+ | Includes: Variator (1200-1286), Secondary Sheave (1200-1288), CVT Spring 1500RPM (1200-1291), Star Clutch Bell (1200-1289), Clutch (1200-1290), 3x roller sets (7g/8g/9g) | SKU: 1200-1284
Model Fitments

Yamaha Zuma 125 (2022 and newer)
  • Same day shipping for orders placed before 2PM (CST) M-F
  • 30-day return period on eligible items
  • Flat-rate shipping for orders shipped to the 48 Contiguous United States.
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