BWS/ZUMA Transmission Parts

Consistent balance. Smooth transmission. OEM-fit quality.

These Roller Weights for YAMAHA BWS 100 / ZUMA 100 are precision-engineered in size 15×12L, available in 3 g to 12 g, and sold as a set of 6 pcs. Manufactured from durable, wear-resistant material, they ensure smooth CVT operation and responsive throttle performance. Ideal for both regular maintenance and tuning while maintaining OEM fitment precision.

Highlights

• 3 g ~ 12 g Range — Fine-tune acceleration and top speed.

• 15×12L Size — OEM-compatible fit for BWS 100 / ZUMA 100 variators.

• Durable Material — Resists wear, deformation, and heat damage.

• Stable CVT Operation — Ensures smooth shifting and throttle response.

• Complete Set — Includes 6 pcs for one full replacement.

Product Specifications
✔ Type: Roller Weights (Standard)
✔ Dimensions: 15×12L
✔ Weight Range: 3 g ~ 12 g
✔ Fitment: YAMAHA BWS 100 / ZUMA 100
✔ Package Includes: Roller Weights ×6

Installation Notes

• Choose roller weight according to your desired acceleration or top speed.

• Replace all 6 pcs simultaneously for even wear.

• Confirm variator size before installation.

• Lightly lubricate roller tracks for smoother operation.

Power You Can Trust.

Enhanced durability. Stable performance. Premium upgrade.

These A+ Roller Weights for YAMAHA BWS 100 / ZUMA 100 are precision-engineered in size 15×12L, available in 3 g to 12 g, and sold as a set of 6 pcs. Compared with standard rollers, the A+ version provides improved wear resistance and smoother operation, maintaining consistent CVT performance and throttle response for extended use.

Highlights

• Upgraded Material — Reduces friction and deformation.

• 3 g ~ 12 g Range — Tune your acceleration and top speed freely.

• 15×12L Size — OEM-fit for BWS 100 / ZUMA 100 variators.

• Smooth CVT Performance — Stable power delivery and throttle feel.

• Complete Set — Includes 6 pcs for one full replacement.

Product Specifications
✔ Type: A+ Roller Weights (Premium)
✔ Dimensions: 15×12L
✔ Weight Range: 3 g ~ 12 g
✔ Fitment: YAMAHA BWS 100 / ZUMA 100
✔ Package Includes: A+ Roller Weights ×6

Installation Notes

• Choose roller weight according to desired performance.

• Replace all 6 pcs together for balanced operation.

• Confirm proper variator fit before installation.

• Apply light lubrication to roller tracks for smooth motion.

Power You Can Trust.

Consistent balance. Smooth transmission. OEM-fit quality.

These Roller Weights for YAMAHA BWS 125 are precision-engineered in size 20×12L, available in 7 g to 15 g, and sold as a set of 6 pcs. Built from durable, wear-resistant material, they ensure smooth CVT operation and consistent throttle response. Ideal for regular maintenance or performance tuning, maintaining OEM fit and long-lasting reliability.

Highlights

• 7 g ~ 15 g Range — Fine-tune acceleration and top-speed response.

• 20×12L Size — OEM-fit for BWS 125 variators.

• Durable Composition — Reduces wear, deformation, and vibration.

• Stable CVT Operation — Smooth shifting and predictable power delivery.

• Complete Set — 6 pcs included for full replacement.

Product Specifications
✔ Type: Roller Weights (Standard)
✔ Dimensions: 20×12L
✔ Weight Range: 7 g ~ 15 g
✔ Fitment: YAMAHA BWS 125
✔ Package Includes: Roller Weights ×6

Installation Notes

• Choose roller weight according to desired acceleration or top speed.

• Replace all 6 pcs together for balanced wear.

• Confirm variator compatibility before installation.

• Lightly lubricate roller tracks for smooth, quiet operation.

Power You Can Trust.

Superior wear resistance. Smoother shifting. Premium upgrade.

These A+ Roller Weights for YAMAHA BWS 125 are precision-engineered in size 20×12L, available in 7 g to 15 g, and sold as a set of 6 pcs. Compared with standard rollers, the A+ version offers enhanced durability, reduced friction, and longer service life, ensuring smoother CVT operation and consistent throttle response for both everyday riding and performance tuning.

Highlights

• Upgraded Composition — Improved wear resistance and durability.

• 7 g ~ 15 g Options — Fine-tune acceleration and top-end performance.

• 20×12L Size — OEM-fit for BWS 125 variator systems.

• Smooth CVT Operation — Reduces vibration and improves throttle stability.

• Complete Set — Includes 6 pcs for one full replacement.

Product Specifications
✔ Type: A+ Roller Weights (Premium)
✔ Dimensions: 20×12L
✔ Weight Range: 7 g ~ 15 g
✔ Fitment: YAMAHA BWS 125
✔ Package Includes: A+ Roller Weights ×6

Installation Notes

• Choose roller weight based on your desired riding performance.

• Replace all 6 pcs at once to maintain even balance.

• Confirm proper variator fit before installation.

• Lightly lubricate roller tracks for smooth and quiet operation.

Power You Can Trust.

Stable Belt Pressure. Smooth Shifting. Adjustable Acceleration Response.

The Driven Spring for YAMAHA BWS100 / ZUMA100 is designed for riders who demand precise CVT tuning and consistent performance. Available in four tension levels — Blue (1000RPM), Orange (1200RPM), Yellow (1500RPM), and Red (2000RPM) — this center spring adjusts pulley reaction force to fine-tune acceleration and backshift speed. Made from durable heat-treated steel, it provides stable tension and long-lasting elasticity for both street and performance setups.

🔹 Highlights

• Four RPM Options — 1000 / 1200 / 1500 / 2000 for precise CVT response tuning

• Color-Coded Design — Easy identification: Blue / Orange / Yellow / Red

• Enhanced Belt Grip — Maintains consistent drive belt pressure under load

• Smooth Downshift Control — Improves throttle recovery and speed transition

• Heat-Treated Spring Steel — Ensures lasting durability and performance stability

✔ Product Specifications

• Type: Driven Spring (Center Spring)

• RPM Rating: 1000 (Blue) / 1200 (Orange) / 1500 (Yellow) / 2000 (Red)

• Fitment: YAMAHA BWS100 / ZUMA100

• Focus: CVT tuning & acceleration balance

• Package Includes: Driven Spring ×1

🔧 Installation Notes

• Choose spring tension based on desired acceleration and backshift response

• Higher RPM springs increase takeoff force and engine braking effect

• Compatible with OEM or modified CVT systems

• Verify spring preload alignment during assembly

Power You Can Trust.

Reinforced Alloy Structure. Stable Pressure. Built for High-Temperature Performance.

This Alloy Driven Spring for YAMAHA BWS100 / ZUMA100 offers improved durability and consistent belt tension for high-performance CVT setups. Constructed from a reinforced alloy-steel blend, it maintains stable elasticity and reaction speed under heat and continuous use. Available in 1000 / 1200 / 1500 / 2000 RPM specifications, this single-color black spring provides precise tuning for both daily riding and performance builds.

🔹 Highlights

• Four RPM Options — 1000 / 1200 / 1500 / 2000 for refined transmission tuning

• Reinforced Alloy Composition — Improved heat resistance and tension stability

• Consistent CVT Response — Maintains belt pressure during acceleration and deceleration

• High Elastic Recovery — Prevents performance loss under repeated stress

• All-Black Finish — Sleek and professional look for performance applications

✔ Product Specifications

• Type: Alloy Driven Spring (Center Spring)

• RPM Rating: 1000 / 1200 / 1500 / 2000

• Color: Black

• Fitment: YAMAHA BWS100 / ZUMA100

• Focus: High-temperature durability & CVT balance

• Package Includes: Alloy Driven Spring ×1

🔧 Installation Notes

• Select desired spring rate according to tuning setup

• Suitable for OEM or upgraded CVT systems

• Higher RPM springs increase acceleration response and backshift control

• Verify preload and seating alignment during installation

Power You Can Trust.