2000 RPM Contra Spring for Yamaha Zuma 50 2T & Minarelli (Standard)

2000 RPM Contra Spring for Yamaha Zuma 50 2T and Minarelli Engines

This 2000 RPM compression/contra spring is made for the Yamaha Zuma 50 2T and other compatible Minarelli two-stroke engines. It sits on the rear driven pulley and governs how the CVT behaves, helping it stay within the intended power range. If you are upgrading your Yamaha Zuma scooter parts, this spring affects how belt pressure is held and when upshifts happen under load.

Functionality and Performance

The red spring is a major factor in transmission tuning. Its added resistance helps the driven pulley keep steady pressure on the drive belt. As a result, the engine can hold its revs for longer during acceleration and remain in its effective power band.

Installation and Compatibility

The 2000 RPM label is a tuning rating, not an exact engagement speed. Before fitting, confirm that the spring's 44 mm inner diameter and 108 mm length suit your rear-pulley spring seats. This spring is built for two-stroke use and will not work on four-stroke models.

Specifications

• Component: Rear driven-pulley compression / contra spring
• Tuning Rating: 2000 RPM
• Wire Diameter: 4.0 mm
• Inner Diameter: 44.0 mm
• Length: 108.0 mm
• Color: Red
• Country of Origin: Taiwan
• OEM Part Number: 660A09OG20
• Fits: Yamaha Zuma 50 and compatible horizontal Minarelli two-stroke scooters

Fitment

Compatible with:

• Yamaha Zuma 50
• Chicago Scooter Company (CSC) Bella Classic 50
• CSC Go
• CSC Go Max
• CSC Nitro Sport 50
• CSC Pug 50
• Other scooters with horizontal Minarelli engines

How to choose: Check the spring's 44 mm inner diameter, 108 mm length, and rear-pulley spring seats against your scooter before you order.

Shop more: Yamaha Zuma Parts · Minarelli 50cc / Yamaha Jog Parts · Scooter Transmission & Final Drive · Scooter Parts