RDLN
RDLN Racing Variator & Roller Tuning Kit - Ruckus/139QMB
Description
Get more from your scooter’s engine with this RDLN racing variator and roller weight tuning kit for compatible Honda Ruckus, Metropolitan, and 139QMB-based builds. The altered variator ramp profile improves power delivery through the CVT, while the coated ramp plate reduces friction for smoother movement. Two included roller sets let you choose a 6g, 7g-equivalent, or 8g configuration to dial in how your scooter accelerates and shifts.
Key Features
- Altered variator ramp profile: Changes the CVT’s shifting behavior to improve acceleration and make better use of the engine’s available power.
- Coated ramp plate: Reduces friction at the plate’s contact surfaces for smoother operation.
- Three tuning choices from two roller sets: Run six 6g rollers, six 8g rollers, or alternate three of each for a 7g-equivalent configuration.
- Durable roller construction: Copper cores and wear-resistant nylon support repeated performance tuning.
- Matched kit components: Includes the variator, coated ramp plate, three slide pieces, drive boss, and two roller weight sets.
- Performance-focused construction: Aluminum alloy variator components combine strength and heat resistance for demanding use.
Technical Specifications
- Brand: RDLN
- Part number: 1200-1273
- Part type: Racing variator with roller weight tuning kit
- Variator outside diameter: 89 mm
- Variator inside diameter: 20 mm
- Drive boss: 20 mm OD × 14 mm ID × 38 mm long
- Roller size: 16 × 13 mm
- Included roller sets: Six 6g rollers and six 8g rollers
- Available tuning configurations: 6g, 7g equivalent, and 8g
- Ramp plate: Friction-reducing coating
Roller Weight Tuning Guide
| Configuration | Rollers installed | Tuning purpose |
|---|---|---|
| 6g | Six 6g rollers | Lighter starting point, generally allowing higher engine RPM during shifting |
| 7g equivalent | Three 6g and three 8g rollers, alternating around the variator | Intermediate average weight for fine-tuning power delivery |
| 8g | Six 8g rollers | Heavier starting point, generally encouraging earlier upshifting at lower RPM |
For the mixed setup, install the rollers in a repeating 6g–8g–6g–8g–6g–8g pattern to keep the arrangement balanced. The average is 7g per roller; no separate 7g roller set is included. Test each setup with your engine and CVT combination to find the strongest usable power delivery. Heavier rollers do not automatically produce a higher top speed.
Compatibility
- Honda Ruckus 50 with compatible GET CVT
- Honda Metropolitan 50 with compatible GET CVT
- Compatible Chinese 139QMB-based four-stroke scooter engines, including stock and big-bore 50cc, 60cc, 80cc, 100cc, and 105cc configurations using the matching CVT
Engine-code applications include 139QMA, 139QMB, 147QMD, 1P39QMQ, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, and BN139QMB. Match the variator, drive boss, and CVT configuration before installation; engine-code lettering alone does not establish fitment.
This product is intended for off-road use only. This product is not intended for use on public roads or land.
Product Diagrams
Features
Specifications
Brand: RDLN; Part number: 1200-1273; Variator OD: 89 mm; Variator ID: 20 mm; Drive boss: 20 mm OD x 14 mm ID x 38 mm long; Roller size: 16x13 mm; Included roller sets: Six 6g and six 8g; Tuning choices: 6g, 7g equivalent (three 6g plus three 8g, alternating), 8g; Coated ramp plate; Altered variator ramp profile; Origin: China; Off-road use only
Model Fitments
Honda Ruckus 50 and Metropolitan 50 with compatible GET CVTs; compatible Chinese 139QMB-based stock and big-bore four-stroke applications (50cc/60cc/80cc/100cc/105cc); engine codes: 139QMA, 139QMB, 147QMD, 1P39QMQ, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB; match variator, boss and CVT configuration
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Same day shipping for orders placed before 2PM (CST) M-F
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30-day return period on eligible items
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Flat-rate shipping for orders shipped to the 48 Contiguous United States.
