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.

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.