Polini Clutch spring Set; Honda Dio, 139QMB
Polini Clutch spring Set; Honda Dio, 139QMB
$37.06
10 in stock
*Note: Free shipping to U.S. mainland (excludes AK, HI, and territories)
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Product Details
Description
Polini Clutch spring Set; Honda Dio, 139QMB
Key Details
- 245.030 Original Parts For Scooters SKU: 146-7
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
- Fits Models / Common Applications: Honda and other compatible models may apply.
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: Will this fit a Honda?
A: This SKU is listed with Honda model fitment where the scooter also matches the listed engine or fitment notes.
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 | 0.3 lbs |
|---|---|
| Dimensions | 4 × 2.5 × 1.5 in |
| Condition | New |
|---|
Fine-tune your launch performance and eliminate sluggish low-end takeoff with the genuine Polini Clutch Spring Tuning Set. Designed to fit original factory clutches on 50cc scooters, this complete tuning kit allows you to adjust your clutch engagement RPM to match modified exhausts, big bore cylinders, or sport CVT setups—ensuring your engine revs directly into its ideal powerband before sending power to the rear wheel.
Key Features
- 4-Stage RPM Tuning Suite: Includes twelve (12) color-coded clutch springs across four distinct tension rates (ranging from 4,000 RPM to 7,000 RPM engagement) for precise transmission calibration.
- Improved Holeshot & Acceleration: Stiffer spring rates delay shoe engagement until higher engine RPMs, launching your machine with maximum torque off the line.
- High-Tensile Alloy Construction: Premium spring steel withstands intense thermal expansion and friction load without weakening or losing tension over time.
- OEM Clutch Direct Fitment: Engineered specifically for standard factory clutch shoes utilizing M28 thread clutch nuts and 39mm socket configurations.
Vehicle & Engine Compatibility
This tuning spring kit is built for standard OEM 2-shoe and 3-shoe clutches across 50cc 2-stroke and 4-stroke platforms:
| Engine Family / Brand | Compatible Models & Engine Configurations |
|---|---|
| 139QMB / 1P39QMB (50cc/80cc) | Standard Chinese 4-stroke platforms (TaoTao, Wolf, Ice Bear, Bintelli, Lance, Kymco, SYM). Fits engine codes with "QM" or "FM". |
| Genuine Scooter Co. | Buddy 50, Buddy 50 International, RoughHouse 50, RoughHouse 50 Sport, Brio 50i |
| Honda 2T / 4T | Dio 50 (AF18 / AF27 / AF28 / AF34 / AF35), Lead 50, Elite 50 (SA50 models with 39mm clutch nut) |
| Piaggio / Vespa 50cc | Zip 50, Typhoon 50, NRG, ET2, LX 50, S 50 (2-stroke & 4-stroke models) |
Clutch Nut Verification: This spring kit fits stock/OEM clutch assemblies with an M28 thread holding nut and 39mm rear pulley socket. It will not fit oversized 107mm or 110mm aftermarket racing clutches.
Technical Specifications
- Kit Contents: 12 total springs (3 springs per color / 4 tension levels)
- Engagement Range: 4,000–7,000 RPM tuning levels
- Clutch Nut / Socket: M28 thread / 39mm socket size
- MPN: 245.030
- SKU: 1200-1218
- Origin: Made in Italy
Mechanic's Tip: Use a proper clutch nut tool to safely remove the 39mm central nut. When installing, use needle-nose pliers or a spring hook to fully seat the hooks through the clutch shoe holes. Verify all three shoes retract evenly before reinstalling.
