JOG 90 Variator Pulley

Crisp launches and steadier revs in a compact 94 mm form.

This Variator Pulley for Yamaha JOG 90 pairs a true-running drive pulley with a matched ramp plate to support predictable belt climb and clean take-offs. Machined interfaces align with OEM geometry for straightforward assembly and consistent alignment in daily riding.

Highlights
🔹 Predictable Shift Curve — Face and ramp geometry help the belt climb smoothly off the line.
🔹 Stable Belt Tracking — Concentric machining and clean surfaces reduce slip and glazing.
🔹 OEM-Fit Interfaces — Pulley bore ID 21 mm and ramp plate profile match stock hardware.
🔹 Tuning-Friendly — Works with your existing roller weights and belt to target RPM after setup.
🔹 Daily to Light-Performance — Suitable for commuting and mild CVT upgrades.

Product Specifications
Pulley Outer / Inner Diameter: 94 mm / 21 mm
Type: Variator Pulley + Ramp Plate
Fitment: Yamaha JOG 90 (confirm year/variant)
Focus: Launch response / shift consistency / belt life
Package Includes: Drive Pulley ×1, Ramp Plate ×1

Installation Notes

  • Confirm ID 21 mm fitment, belt width, and cover clearance before installation.

  • Start with your current rollers; adjust in ±0.5–1.0 g steps to hit target RPM.

  • Keep pulley faces and ramps clean and dry; do not grease belt contact or ramp faces.

  • Torque the variator nut to spec; hand-rotate to verify free travel, then road-test and inspect for even contact.

Power You Can Trust.