Product Description
This NCY Super Transmission kit is the coordinated CVT performance upgrade for Honda Dio, other models using Dio transmission components, Kymco Agility 50 and Filly 50, and compatible Genuine 50cc and 139QMB scooter applications. Quicker acceleration, responsive downshifting and tunable cruising performance bring more life to your build, with an adjustable torque-driver sheave, NCY Bearing Spring Seat, matched clutch components, and three roller-weight sets to dial in the response.
Key Features
- Lightweight, low-friction drive components: The ultralight drive face supports quicker RPM pickup where compatible, while the coated Golden Pulley and pressure plate promote smooth shifting.
- Performance clutch and bell: High-friction shoes and a vented bell support positive engagement and heat dissipation.
- Three roller-weight options: Six each of 7g, 8g and 9g rollers let you tune CVT response to the engine and rider.
- 1000 RPM compression spring: Supports responsive downshifting during deceleration and hill climbing.
- Adjustable torque-driver sheave: Choose the three straight grooves for quicker takeoff or the three bent grooves for higher top-speed tuning, tailoring CVT acceleration to your needs.
- NCY Bearing Spring Seat: A ball-bearing track lets the torque spring rotate freely instead of binding against the clutch pulleys, reducing friction and acceleration dead spots for smoother back-shifting and snappier throttle response.
Technical Specifications
- Brand: NCY
- Part number: 1200-1171
- Manufacturer part number: 999A01DIOR
- Kit type: Super Transmission performance CVT kit
- Roller dimensions: 16 × 13 mm
- Included roller sets: 7g, 8g and 9g, six rollers per set
- Total rollers: 18
- Compression spring: 1000 RPM rating
- Clutch: NCY performance, non-adjustable
- Torque-driver sheave: Adjustable, with three straight grooves and three bent grooves
- Spring seat: NCY Bearing Spring Seat with ball-bearing track
Kit Contents
- NCY ultralight outer drive face
- Coated Golden Pulley variator and pressure plate
- Secondary pulley assembly with adjustable torque-driver sheave
- NCY performance clutch and vented clutch bell
- NCY Bearing Spring Seat
- Three sets of 16 × 13 mm tuning rollers, 7g/8g/9g
- 1000 RPM compression spring and accompanying small components
Compatibility
| Application | Fitment requirements |
|---|---|
| Honda Dio and other models using Dio transmission components | Matching Dio transmission configuration |
| Kymco Agility 50 and Filly 50 | Compatible transmission applications |
| Genuine Buddy 50 and RoughHouse 50 | Reuse the original OEM outer drive face for clearance |
| 139QMB / QMB139 and related GY6 50cc platforms | Compatible TaoTao, Wolf, Chicago Scooter Company Go/Go Max and Icebear applications; compare the installed CVT components |
| SYM / ADLY applications | Compatible Fiddle 50, Jet 50 and Fox 50 configurations |
| 147QMD and big-bore 139QMB applications | Compatible 80cc builds retaining the matching small-engine CVT configuration |
Confirm the engine and installed transmission configuration before ordering. Model name or displacement alone does not establish fitment.
Installation and Tuning
Use the adjustable torque-driver sheave to tailor CVT response: its three straight grooves favor quicker takeoff, while its three bent grooves favor higher top speed. Select the groove style to suit your riding goals, then tune the rollers to complement it.
Start with the 8g rollers as a tuning baseline, then evaluate engine RPM and response under load. The 7g set offers a lighter-weight option for acceleration-focused tuning; results depend on the engine, belt and overall setup. Inspect the drive belt during installation and replace it with the correct application-specific belt if worn.
