Clutch Bell

Clutch Outer Covers

TWH clutch bells are precision-balanced and built with heat-dissipating features like matte inner coatings and dust-release cutouts. Designed for both stock and oversized clutch setups.

JOG 50 2D Clutch Bell JOG50

JOG 50 2D Clutch Bell

Lightweight shell, clean bite, cooler stops.

This 2D Clutch Bell for Yamaha JOG 50 focuses on airflow and consistent engagement. The inner matte-textured surface promotes predictable pad bite, while enlarged front cutouts and side dust-release holes help move heat and eject debris for steadier feel in stop-and-go riding.

Highlights
🔹 Textured Inner Face — Matte finish supports clean, repeatable engagement.
🔹 Airflow-Oriented Cutouts — Front openings help evacuate heat.
🔹 Side Dust-Release Holes — Eject clutch dust to reduce glazing.
🔹 OEM-Fit Interfaces — Drop-in alignment with stock hardware.
🔹 Everyday to Light Tuning — Suits city riding and mild CVT setups.

Product Specifications
Outer / Inner Diameter: 119.5 mm / 111.5 mm
Weight: 410 g
Material: Steel
Fitment: Yamaha JOG 50 (also shared with JOG 90 / RS 100; confirm year/variant)
Focus: Consistent bite / heat & dust management
Package Includes: Clutch Bell ×1

Installation Notes

  • Confirm OD/ID with clutch shoes and cover clearance.

  • Inspect shoes and small springs; replace if worn or heat-cracked.

  • After installation, gentle run-in; check for noise/vibration and even contact.

  • Pair with healthy belt/rollers; overall CVT condition affects results.

Power You Can Trust.

JOG 90 2D Clutch Bell JOG90

JOG 90 2D Clutch Bell

Lightweight airflow design for clean engagement and cooler stops.

This 2D Clutch Bell for Yamaha JOG 90 focuses on airflow and consistent bite. The matte-coated inner face promotes predictable engagement, while enlarged front cutouts and side dust-release holes help move heat and eject debris during stop-and-go riding. OEM-fit dimensions make installation straightforward.

Highlights
🔹 Matte-Coated Inner Face — Coating supports clean, repeatable clutch bite.
🔹 Airflow-Oriented Cutouts — Enlarged front openings assist CVT compartment cooling.
🔹 Side Dust-Release Holes — Eject clutch dust to reduce glazing and slip.
🔹 Lightweight, Daily-Ready — 410 g construction balances response and durability.
🔹 OEM-Fit Alignment — Interfaces match stock hardware for easy drop-in.

Product Specifications
Outer / Inner Diameter: 119.5 mm / 111.5 mm
Weight: 410 g
Material: Steel
Fitment: Yamaha JOG 90 (shared spec with JOG 50 / RS 100; confirm year/variant)
Focus: Consistent engagement / heat & dust management
Package Includes: Clutch Bell ×1

Installation Notes

  • Confirm shoe size and cover clearance before installation.

  • Inspect shoes and small springs; replace if worn or heat-checked.

  • Keep the inner surface clean and dry; do not lubricate the contact area.

  • Gentle run-in, then recheck for noise, vibration, or uneven contact.

Power You Can Trust.

CYGNUS Clutch Bell CYGNUS

CYGNUS Clutch Bell

Textured inner face & vented design—steady engagement, OEM-fit geometry.

The CYGNUS Clutch Bell is built to Ø131.5 mm OD / Ø120 mm ID for Yamaha CYGNUS applications. A micro-textured (sandblasted) inner working face helps the shoes bite cleanly, while vent/ejection holes promote dust purge and airflow to keep engagement consistent through heat cycles. At 690 g, the bell supports smooth takeoff when paired with appropriate springs and variator tuning.

🔹 OEM-Fit Dimensions — Ø131.5 mm OD / Ø120 mm ID for stock-layout compatibility
🔹 Textured Inner Face — Sandblasted surface aids clean bite, reduces slip/chatter, resists glazing
🔹 Vented / Ejection Holes — Promote dust evacuation and cooling for steadier feel over repeated stops
🔹 690 g Bell Mass — Provides inertia for smoother drive-off with matched springs/rollers
🔹 Precision Roundness — Concentric running surfaces for consistent shoe contact

Product Specifications
Outer / Inner Diameter: Ø131.5 mm / Ø120 mm
Weight: 690 g
Fitment: YAMAHA CYGNUS models (year/market dependent)
Focus: Clean bite, temperature stability, straightforward install
Package Includes: Clutch bell (1 pc)

Installation Notes
• Deglaze shoes and bell; avoid oil/grease contamination on the working face.
• Torque the retaining nut per the service manual; confirm spacer/washer orientation if equipped.
• Bed in with several moderate launches; fine-tune contra/clutch springs and roller weights as needed.

Power You Can Trust.

RS 100 2D Clutch Bell RS100

RS 100 2D Clutch Bell

Lightweight airflow shell for cleaner bite and steadier stops.

This 2D Clutch Bell for RS 100 pairs a matte-coated inner face with airflow-oriented cutouts to help engagement stay predictable through repeated starts. Front openings move heat away, while side dust ports help eject debris to reduce glazing. OEM-fit geometry keeps installation straightforward.

Highlights
🔹 Matte-Coated Inner Face — Coating supports clean, repeatable clutch bite.
🔹 Airflow Front Cutouts — Assist CVT compartment cooling under stop-and-go use.
🔹 Side Dust Ports — Help eject wear dust and reduce glazing/slip.
🔹 410 g Lightweight Shell — Balanced response for daily and light-tuned setups.
🔹 OEM-Fit Interfaces — Drop-in alignment with stock hardware.

Product Specifications
Outer / Inner Diameter: 119.5 mm / 111.5 mm
Weight: 410 g
Material: Steel
Fitment: RS 100 (shares spec with JOG 50 / JOG 90; confirm year/variant)
Focus: Consistent engagement / heat & dust management
Package Includes: Clutch Bell ×1

Installation Notes

  • Verify shoe size and cover clearance; confirm OD/ID compatibility.

  • Inspect clutch shoes and small springs; replace if worn or heat-checked.

  • Keep the inner surface clean and dry; do not lubricate contact areas.

  • Gentle run-in, then recheck for noise, vibration, or uneven contact.

Power You Can Trust.

RS 100 3D Clutch Bell RS100

RS 100 3D Clutch Bell

Reinforced Outer Ring. Sandblasted Inner Surface. Vent-Cut Cooling Efficiency.

This RS100 3D Clutch Bell features a reinforced outer safety ring, distinguishing it from standard 2D clutch bells and improving structural strength at high RPM. The sandblasted inner surface increases friction for quicker clutch engagement, while the front vent-cut openings help reduce heat buildup and maintain consistent performance during repeated acceleration.

Designed for RS100 riders seeking a stable, responsive, and durable CVT upgrade for daily riding and light performance tuning.

🔹 Highlights

  • Reinforced Outer Ring (3D Design) — Stronger structure vs. 2D clutch bell

  • Sandblasted Inner Surface — Improved bite and stable engagement

  • Vent-Cut Openings — Enhanced cooling airflow and dust release

  • Lightweight 455 g — Reduced rotational load, smoother response

  • OEM-Compatible Fitment — Direct installation for RS100 CVT systems

Product Specifications

  • Type: 3D Clutch Bell

  • Outer Diameter: 122 mm

  • Inner Diameter: 112 mm

  • Weight: 455 g

  • Fitment: RS100

  • Focus: Structural strength & cooling efficiency

  • Package Includes: Clutch Bell ×1

🔧 Installation Notes

  • Ensure clutch shoe condition before installation

  • Confirm proper clearance between clutch bell and clutch housing

  • Recommended to inspect springs for optimal response

  • Allow a short break-in period for sandblasted surface engagement

Power You Can Trust.

RS 100 QPQ Light Weight Clutch Bell RS100

RS 100 QPQ Light Weight Clutch Bell

Enhanced Bite. QPQ Surface Strength. Lightweight Daily Performance.

This QPQ Light Weight Clutch Bell for RS100 features a unique internal groove-pattern design, replacing traditional sandblasted coatings to provide stronger clutch shoe engagement under acceleration. The hardened QPQ (Quench–Polish–Quench) surface treatment enhances wear resistance while maintaining stable thermal performance.
Designed without ventilation cutouts, the structure improves rigidity and delivers consistent power transfer for daily riding and mild performance tuning.

🔹 Highlights

  • Internal Groove Pattern — Enhances bite and clutch shoe engagement

  • QPQ Surface Treatment — Superior wear resistance and smooth rotation

  • Lightweight Structure (520 g) — Improves response and reduces rotational load

  • No Vent Cutouts — Increased shell rigidity and stable performance

  • OEM-Compatible Fitment — Designed specifically for RS100 clutch systems

Product Specifications

  • Type: QPQ Light Weight Clutch Bell

  • Outer Diameter: 123.5 mm

  • Inner Diameter: 112 mm

  • Weight: 520 g

  • Fitment: RS100

  • Focus: Enhanced bite strength & rotational efficiency

  • Package Includes: Clutch Bell ×1

🔧 Installation Notes

  • Ensure proper clutch shoe surface condition before installation

  • Check clearance between clutch bell and housing

  • Recommended to inspect clutch springs for best performance

  • Break-in period required for optimal groove engagement

Power You Can Trust.

AEROX Clutch Bell AEROX

AEROX Clutch Bell

Reinforced Safety Ring. Sandblasted Inner Surface. Vent-Cut Cooling Flow.

This Clutch Bell for AEROX features a reinforced outer safety ring, providing additional structural strength during high-RPM operation. The sandblasted inner surface increases clutch shoe bite for faster engagement, while the vent-cut openings enhance airflow, reduce heat buildup, and improve overall clutch consistency.

With its large 137 mm outer diameter and durable 715 g structure, it delivers stable power transfer and reliable CVT performance for daily riding and light performance upgrades.

🔹 Highlights

  • Reinforced Outer Ring — Stronger structure for high-RPM durability

  • Sandblasted Inner Surface — Improved clutch bite and stable engagement

  • Vent-Cut Openings — Enhanced cooling and dust release

  • Large OD 137 mm — Broad contact area for stronger stability

  • OEM-Compatible Fitment — Designed specifically for AEROX CVT systems

Product Specifications

  • Type: Clutch Bell

  • Outer Diameter: 137 mm

  • Inner Diameter: 125 mm

  • Weight: 715 g

  • Fitment: AEROX

  • Focus: Strength, cooling efficiency & engagement stability

  • Package Includes: Clutch Bell ×1

🔧 Installation Notes

  • Check clutch shoe condition before installation

  • Ensure proper clearance with clutch housing

  • Inspect springs to optimize engagement response

  • Sandblasted surface requires a short break-in period

Power You Can Trust.

MIO Reinforced Clutch Bell MIO

MIO Reinforced Clutch Bell

Reinforced Outer Ring. Sandblasted Inner Surface. Side Vent-Cut Cooling.

This Reinforced Clutch Bell for MIO is engineered with an outer reinforcement ring for improved rigidity at high RPM. The sandblasted inner surface enhances clutch shoe bite, while the side vent-cut openings improve cooling and dust release.

With an outer diameter of 122 mm and a lightweight 470 g construction, it provides responsive acceleration and stable durability for both daily and performance riding.

🔹 Highlights

  • Reinforced Outer Ring — Higher rigidity for high-RPM operation

  • Sandblasted Inner Surface — Better bite & smoother engagement

  • Side Vent-Cut Openings — Improved cooling & dust ejection

  • Lightweight 470 g — Faster rotational response

  • OEM-Compatible Fitment — Designed for MIO CVT systems

Product Specifications

  • Type: Reinforced Clutch Bell

  • Outer Diameter: 122 mm

  • Inner Diameter: 112 mm

  • Weight: 470 g

  • Fitment: Yamaha MIO series

  • Focus: Structural strength, cooling efficiency, engagement stability

  • Package Includes: Reinforced Clutch Bell ×1

🔧 Installation Notes

  • Inspect clutch shoes before installation

  • Verify bell–to–housing clearance

  • Check springs for consistent response

  • Sandblasted surface requires short break-in

Power You Can Trust.

NMAX Clutch Bell NMAX

NMAX Clutch Bell

Reinforced Safety Ring. Sandblasted Inner Surface. Vent-Cut Cooling Flow.

This Clutch Bell for N-MAX features a reinforced outer safety ring, providing additional structural strength during high-RPM operation. The sandblasted inner surface increases clutch shoe bite for faster engagement, while the vent-cut openings enhance airflow, reduce heat buildup, and improve clutch consistency.

With its large 137 mm outer diameter and durable 715 g structure, it delivers stable power transfer and reliable CVT performance for daily riding and light performance upgrades.

🔹 Highlights

  • Reinforced Outer Ring — Stronger structure for high-RPM durability

  • Sandblasted Inner Surface — Improved clutch bite and stable engagement

  • Vent-Cut Openings — Enhanced cooling and dust release

  • Large OD 137 mm — Broad contact area for stronger stability

  • OEM-Compatible Fitment — Designed specifically for N-MAX CVT systems

Product Specifications

  • Type: Clutch Bell

  • Outer Diameter: 137 mm

  • Inner Diameter: 125 mm

  • Weight: 715 g

  • Fitment: N-MAX

  • Focus: Strength, cooling efficiency & engagement stability

  • Package Includes: Clutch Bell ×1

🔧 Installation Notes

  • Check clutch shoe condition before installation

  • Ensure proper clearance with clutch housing

  • Inspect springs to optimize engagement response

  • Sandblasted surface requires a short break-in period

Power You Can Trust.