Polini 1500 RPM Compression Torque Spring | 139QMB Dio

The Polini Compression Torque Spring (contra spring) at 1500 RPM is a direct-fit performance upgrade for Honda Ruckus, Honda Dio, Genuine Buddy/Roughhouse, and a wide range of 139QMB-based 50cc and 80cc scooters. A stiffer contra spring raises the RPM at which your CVT begins upshifting, keeping the engine in its powerband longer for stronger acceleration and improved top-end performance. Made in Italy by Polini to exacting tolerances.

Key Features

• 1500 RPM Engagement: Raises CVT upshift point to keep the engine in its powerband for stronger pull-away and mid-range performance.
• Blue Anodized Finish: Easy visual identification; color-coded to 1500 RPM rating.
• Made in Italy: Polini manufacturing quality with over 50 years of motorsport heritage.
• Wide Compatibility: Fits Honda Ruckus/Dio platform and 139QMB-based Chinese 50cc/80cc scooters.

Technical Specifications

• RPM Rating: 1500 RPM
• Color: Blue
• Polini MPN: 243.022
• Origin: Made in Italy

Compatibility

Honda / Genuine platform:

139QMB-based 50cc / 80cc engines with the following engine codes:

If your engine code includes "QM" or "FM", this spring is likely compatible with your vehicle.

California Prop 65 Warning: www.p65warnings.ca.gov

• 1500 RPM contra spring engagement
• Blue anodized color coding
• Raises CVT upshift point for stronger acceleration
• Fits Honda Ruckus/Dio and 139QMB platform
• Made in Italy by Polini

RPM Rating: 1500 | Color: Blue | MPN: 243.022 | Engine: Honda Ruckus/Dio, 139QMB / 1P39QMB | Displacement: 50cc / 80cc | Origin: Italy

Honda Ruckus 50, Honda Dio 50, Genuine Buddy 50, Genuine Roughhouse 50, Genuine Rattler 50; 139QMB/1P39QMB/139QMA/YN139QMB/JJ1P39QMB/139FMA-2/BD1P39QMB/BN139QMB/147QMD 50cc-80cc engines. Compatible with any engine code containing QM or FM.