Polini Compression Torque Spring (1500 RPM); 139QMB, Dio
Polini Compression Torque Spring (1500 RPM); 139QMB, Dio
$30.36
10 in stock
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Product Details
Description
Polini Compression Torque Spring (1500 RPM); 139QMB, Dio
Key Details
- 243.022 Original Parts For Scooters SKU: 146-6
Compatibility
Fits many 139QMB-based 50cc / 80cc scooter engines. Confirm measurements, connector style, and engine family before ordering.
Replacement Part Details
Use this part when the original component is worn, damaged, missing, or no longer working correctly. Many scooter parts can look similar but use different sizes, plugs, brackets, thread patterns, or mounting styles, so careful comparison before purchase is recommended.
Compatibility / Fitment
Use the fitment details below to confirm this part matches your scooter before ordering.
- Engine Size: 50cc, 80cc
- Engine Code: 139QMB
Fitment Guide: This compatibility information is based on manufacturer and supplier data. Listed models are common known applications and may not include every compatible scooter. If your scooter has multiple versions or production changes, confirm the correct match before ordering. Check photos, measurements, original part numbers, engine code, model, and related fitment information whenever possible.
Common Fitment Questions
Q: Will this fit a 139QMB engine?
A: This SKU is listed as compatible with 139QMB engine-code fitment. Always compare your original part and scooter details before ordering.
Q: Is this for 50cc scooters?
A: This SKU is listed with 50cc engine-size fitment. Confirm exact model, year, and part style before ordering.
Additional information
| Weight | 0.4 lbs |
|---|---|
| Dimensions | 5 × 5 × 6 in |
| Condition | New |
|---|
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
Honda / Genuine platform:
| Honda Ruckus 50 | Honda Dio 50 |
| Genuine Buddy 50 | Genuine Roughhouse 50 |
| Genuine Rattler 50 |
139QMB-based 50cc / 80cc engines with the following engine codes:
| 139QMA | 139QMB | 1P39QMB | 1P39QMA-2 |
| YN139QMB | JJ1P39QMB | 139FMA-2 | BD1P39QMB |
| BN139QMB | 147QMD | Other QMA models | Other QMB models |
If your engine code includes "QM" or "FM", this spring is likely compatible with your vehicle.
