Product Details
Description
Polini Up Gear Set (13×44); Yamaha Zuma 50
Key Details
- 202.1370, Original Parts For Scooters SKU: 146-38
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.
- Fits Models / Common Applications: Yamaha Zuma 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 Yamaha?
A: This SKU is listed with Yamaha model fitment where the scooter also matches the listed engine or fitment notes.
Additional information
| Weight | 1.5 lbs |
|---|---|
| Dimensions | 8 × 6 × 3 in |
| Condition | New |
|---|
Unleash higher top-end speeds and lower your cruising RPMs with the premium Polini Aftermarket 13x44 Up-Gear Set. Specially engineered for 50cc 2-stroke scooters utilizing a Minarelli-style engine architecture, this taller primary gear kit alters your final drive ratio to maximize the output of modified high-performance configurations.
Key Features
- Taller Gearing: Features an optimized 13/44 tooth count profile, providing an excellent up-gear ratio to significantly extend your machine's top-speed ceiling.
- Reduced Engine Over-Rev: Lowers overall engine RPMs when running at full throttle, conserving fuel and reducing engine wear.
- Premium Polini Engineering: Precision-machined from high-tensile hardened steel to withstand extreme transmission friction, high temperatures, and intense drivetrain stress.
Vehicle & Engine Compatibility Matrix
This up-gear set is built specifically for 2-stroke (2T) horizontal and vertical Minarelli engine configurations. Review verified model lines below:
| Brand | Compatible Models (50cc 2-Stroke Minarelli Engines) |
|---|---|
| Yamaha | Zuma 50 (1997–2011 2T platforms), Jog 2T |
| Aprilia | SR50, Scarabeo 50 |
| Malaguti | F12 Phantom, F15 Firefox, Ciak 50 |
| Benelli | Pepe 50 |
HIGH-PERFORMANCE TUNING NOTICE: This product is an advanced taller gear modification. It is recommended for vehicles already upgraded with a 70cc big bore cylinder kit. A stock 50cc engine does not possess enough low-end horsepower to effectively pull a taller gear set, which will result in sluggish acceleration. Installation requires a 10x1.25mm nut (not included).
Technical Specifications
- Gear Ratio Count: 13 / 44 Tooth
- Engine Type Match: Minarelli 50cc 2-Stroke Family
- Required Fastener Size: 10x1.25mm Nut (Sold Separately)
- Manufacturer Part Number (MPN): 202.1370
- Vendor: Polini Motori





