JOG 90 Transmission Parts

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.

Move more air. Shed heat. Keep shifts consistent.

This Aluminum Cooling Fan for Yamaha JOG 90 circulates air across the CVT compartment to help control belt and sheave temperatures during stop-and-go riding. Its rigid aluminum construction maintains shape at heat, while the included washer sets the hub stack height for clean, wobble-free running.

Highlights
🔹 Directed Airflow — Blade geometry helps push fresh air through the CVT cover for steadier temps.
🔹 Heat & Glazing Control — Supports belt life and shift consistency under repeated launches.
🔹 Rigid, Lightweight — 89 g aluminum fan resists deformation compared with resin pieces.
🔹 Color Options — Red / Yellow / Blue finishes complement your build.
🔹 OEM-Fit Hub — Drop-in fit with the supplied washer/spacer.

Product Specifications
✔ Outer Diameter: 93 mm
✔ Weight: 89 g
✔ Material: Aluminum
✔ Colors: Red / Yellow / Blue
✔ Type: CVT front cooling fan
✔ Fitment: Yamaha JOG 90 (confirm year/variant)
✔ Package Includes: Aluminum Fan ×1, Fan Washer/Spacer ×1

Installation Notes

• Match blade orientation/rotation to OEM so the fan draws air correctly.

• Seat the washer/spacer as shown in your service layout; verify cover clearance.

• Torque the variator nut to spec; hand-rotate to confirm no rubbing.

• After the first ride, inspect for contact marks and recheck fastener torque.

Power You Can Trust.

Longer belt travel. Smoother shift curve. Better heat control.

This Oversize Variator Kit for Yamaha JOG 90 pairs a 100 mm drive pulley (14° face) with a matched ramp plate and an oversize 100 mm cooling fan. The larger working diameter increases effective belt travel for a wider ratio range, while the face geometry supports a predictable shift and steady mid-range. The aluminum fan helps move more air through the CVT compartment to keep performance consistent in stop-and-go riding.

Highlights

• 100 mm Oversize Pulley — Extends belt climb for broader ratio coverage and cleaner launches.

• 14° Face Geometry — Aims for linear, repeatable shifting with stable belt contact.

• 100 mm Cooling Fan — Improves airflow through the cover to help manage heat and glazing.

• OEM-Fit Interfaces — ID 21 mm bore and ramp plate profile align with stock hardware.

• Tuning-Friendly — Works with common roller weights and belts to target your preferred RPM band.

Product Specifications
✔ Pulley OD / ID: 100 mm / 21 mm
✔ Pulley Face Angle: 14°
✔ Fan OD: 100 mm
✔ Total Kit Weight: 405 g
✔ Type: Oversize Variator Pulley + Ramp Plate + Cooling Fan
✔ Fitment: Yamaha JOG 90
✔ Package Includes: Oversize Drive Pulley ×1, Ramp Plate ×1, Oversize Fan ×1

Installation Notes

• Verify cover clearance for the 100 mm pulley/fan and confirm belt width/length compatibility.

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

• Keep pulley faces clean and dry; follow service manual for ramp plate lubrication guidelines (do not grease belt contact areas).

• Torque the variator nut to spec; hand-rotate to confirm no rubbing, then road-test and inspect belt climb marks.

Power You Can Trust.

More air. Lower temps. No spacer needed.

This Oversize Cooling Fan for Yamaha JOG 90 pushes more air through the CVT cover to help control belt and sheave temperatures in stop-and-go riding. The 100 mm diameter increases throughput, while the spacerless hub sets stack height correctly for clean, wobble-free running and simpler assembly.

Highlights

• 100 mm Oversize Airflow — Larger sweep area circulates more fresh air through the CVT compartment.

• Heat & Glazing Control — Supports belt life and shift consistency under repeated launches.

• Spacerless Hub — Direct fit with correct stack height; no washer/spacer required.

• Rigid, Balanced Build — Helps maintain shape at temperature for smooth rotation.

• Daily to Light-Performance — Designed to stabilize feel in city commutes and hill climbs.

Product Specifications
✔ Outer Diameter: 100 mm
✔ Weight: 120 g
✔ Type: CVT front cooling fan
✔ Fitment: Yamaha JOG 90
✔ Package Includes: Oversize Cooling Fan ×1 (no spacer required)
Upgrade note: supersedes the previous 93 mm aluminum fan (≈90 g) that required a washer/spacer.

Installation Notes

• Match blade rotation/orientation to OEM so the fan draws air correctly.

• Verify cover clearance for 100 mm OD and confirm belt line alignment.

• Torque the variator nut to spec; hand-rotate to confirm no rubbing.

• After the first ride, inspect for contact marks and recheck fastener torque.

Power You Can Trust.

Lower rotating mass. Cleaner engagement. Consistent launches.

This Lightweight Clutch for Yamaha JOG 90 trims rotating mass to help the engine build RPM faster while keeping engagement predictable. A rigid carrier and stable shoe geometry support clean, repeatable contact inside the bell for steady take-offs in daily use.

Highlights

• Reduced Rotational Mass — 440 g assembly supports quicker rev-up after proper CVT tuning.

• Predictable Engagement — Stable shoe geometry targets a clean, repeatable bite.

• Heat-Fade Resistance — Rigid carrier helps maintain pressure and feel under temperature.

• OEM-Fit Interfaces — Hub splines/threads align with stock hardware for straightforward assembly.

• Tuning-Friendly — Engagement RPM can be set via clutch spring rate to match your riding style.

Product Specifications
✔ Outer Diameter: 106 mm
✔ Weight: 440 g
✔ Type: Automatic centrifugal Lightweight Clutch (assembly)
✔ Fitment: Yamaha JOG 90 (confirm year/variant)
✔ Focus: Launch response / engagement consistency
✔ Package Includes: Clutch Assembly ×1

Installation Notes

• Verify bell inner diameter and cover clearance; bed the clutch to a clean, oil-free bell surface.

• Replace all three small springs together and set rate to hit target engagement RPM.

• Recheck roller weights and contra spring for overall balance; torque fasteners to spec.

• Road-test, then inspect for creeping, slip, or uneven contact and fine-tune as needed.

Power You Can Trust.

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.

Smoother shifts, steadier backshift, daily-ready.

This Sliding Sheave Set for Yamaha JOG 90 uses guided slide tracks and true-running faces so the belt climbs cleanly and returns ratio promptly under load. Machined hubs align with OEM geometry for reliable fitment, while the broad face area helps manage heat during stop-and-go riding.

Highlights

• Predictable Shift Curve — Guided sliding path supports smooth upshift and timely backshift.

• Stable Belt Tracking — Face geometry helps reduce slip, glazing, and belt wander.

• Concentric, True Running — Machined hubs/bores promote straight, low-friction travel.

• Heat Management — Surface finish and face area aid dissipation for consistent feel.

• Tuning-Friendly — Works with common contra springs and belts to target your RPM/load.

Product Specifications
✔ Type: Sliding Sheave Set (movable + fixed)
✔ Fitment: Yamaha JOG 90
✔ Focus: Shift smoothness / backshift stability / belt longevity
✔ Package Includes: Movable Sheave ×1, Fixed Sheave ×1

Installation Notes

• Verify compatibility with belt width, clutch assembly, and cover clearance before installation.

• Keep sheave faces and ramps clean and dry; do not grease belt contact surfaces.

• Set contra spring rate to match target engagement/backshift; recheck roller weights.

• After assembly, hand-rotate to confirm free travel; road-test and inspect for even contact and abnormal wear.

Power You Can Trust.

Set engagement RPM to fit your ride.

These Clutch Springs let you fine-tune clutch bite on Yamaha JOG 90. Four color-coded options help you choose how early or late the clutch engages. Higher rates generally raise engagement RPM for snappier launches (with proper CVT tuning); lower rates suit relaxed take-offs and daily commuting.

Highlights
🔹 4 Selectable Rates — 1000 / 1200 / 1500 / 2000 RPM cover daily to sport setups.
🔹 Color-Coded Clarity — Blue / Orange / Yellow / Red for quick ID in the shop.
🔹 Consistent Response — Matched spring rates support predictable take-off behavior.
🔹 Tuning-Friendly — Pair with roller weights and contra spring to target your RPM band.
🔹 Direct OEM Fit — Designed for JOG 90 automatic centrifugal clutches.

Product Specifications
✔ Rates & Colors: 1000 (Blue) / 1200 (Orange) / 1500 (Yellow) / 2000 (Red)
✔ Quantity: 3 pcs / set
✔ Type: Clutch shoe springs (automatic centrifugal clutch)
✔ Fitment: Yamaha JOG 90
✔ Focus: Engagement RPM control / launch feel
✔ Package Includes: Clutch Springs ×3

Installation Notes

• Replace all three springs together; do not mix rates in one clutch.

• Actual engagement RPM varies with rollers, contra spring, shoes, bell, and tach reading.

• Use a proper spring tool; confirm hook seating and free movement after assembly.

• Road-test, then recheck for creeping, slip, or noise and fine-tune as needed.

Power You Can Trust.

Custom Gear Ratios • 4 Options • Smoother Power Delivery

⚙️ Tailored gearing for every rider's tuning needs.
This Transmission Gear for JOG 90 is designed to enhance acceleration and optimize CVT response across different riding styles. Available in four gear ratio options — 14x26T, 14x27T, 14x32T, and 15x31T — this set lets you fine-tune your scooter’s drivetrain for stronger takeoff or better high-speed stretch. Perfect for riders upgrading variators, clutches, or big bore kits.

🔹 Gear ratio options: 14x26T / 14x27T / 14x32T / 15x31T
🔹 Improves acceleration and top-end balance
🔹 Compatible with JOG 90 CVT transmission
🔹 Built for tuning upgrades and race setup

Video: https://youtu.be/2TIE05ZZ1q8

Upgrade your JOG 90 with the right gear combination and experience sharper throttle, smoother climbs, and better mid-range power.