Polini Up Gear Set 13/44 | Yamaha Zuma & Minarelli 50
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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
Shipping information
Orders are prepared as quickly as possible. Delivery times and shipping costs are calculated at checkout based on the destination and items ordered.
Returns & warranty
Please verify fitment and part number before ordering. Contact Thrifty Scooters promptly if an item arrives damaged or incorrect.