WH 125cc 150cc Front Variator Assembly

Brand: Mortch Motor
Product Code: MIWH125-3033A

Product Viewed: 185

Availability: In Stock

Weight: 0.85kg

Packing Size: 12.00 x 12.00 x 7.00cm

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WH 125cc Front Variator Assembly

🏍️ Front Variator · CVT Drive Face · Pulley Assembly · CVT Tuning Part

For 125cc GY6 1P53QMI Engines · 19 Spline · Includes 20mm x 15mm Roller Weights · Fits Various Scooters & ATVs

📋 Product Overview

This is the WH 125cc Front Variator Assembly, a core component of the scooter CVT (Continuously Variable Transmission) system. It is designed for vehicles equipped with 125cc GY6 1P53QMI engines. This assembly features a 19-spline design and includes all components: drive face, variator, pressure plate, sliders, pressure spring, and roller weights (20mm x 15mm), making it an ideal choice for CVT system repair or performance upgrades.

The front variator assembly (also known as the drive pulley assembly) transfers engine power to the rear variator via the CVT belt while automatically adjusting the gear ratio based on engine RPM, enabling seamless continuously variable transmission. When the original variator suffers from wear, worn roller weights, sticky sliders, or inconsistent shifting, replacing this assembly will restore CVT smoothness, improve acceleration response, and enhance fuel economy. This product is widely used on various Chinese-made 125cc GY6 scooters and ATVs.

✨ Core Functions: Continuously variable transmission · Transfer engine power · Optimize acceleration · Restore shifting smoothness · Improve fuel economy

📐 Specifications

Product Name

Front Variator Assembly

Compatible Engine

125cc GY6 1P53QMI

Overall Height

75mm

Largest Outer Diameter

φ114.5mm

Shaft Diameter

φ15mm

Number of Splines

19 Teeth

Roller Weight Size

20mm x 15mm

Kit Includes

Drive Face + Variator + Pressure Plate + Sliders + Spring + Rollers

🔧 Compatibility

This front variator assembly is compatible with the following vehicles and engines:

Engine Model: 125cc GY6 1P53QMI (and other GY6 series engines)
Compatible Vehicles: Various 125cc scooters equipped with GY6 engines
Compatible ATVs: 125cc ATVs equipped with GY6 engines
Spline Specification: 19 Spline (GY6 standard specification)
Brand Compatibility: Widely used on Chinese-made and some imported GY6 scooters

📌 Compatibility Note: This variator assembly is designed for GY6 125cc engines (1P53QMI) with 19-spline crankshaft. Before installation, verify your crankshaft has 19 splines and a 15mm shaft diameter.

⚙️ Importance of the Front Variator

🔄 CVT Control

Automatically adjusts pulley diameter based on engine RPM, providing seamless gearless operation.

⚡ Power Transfer

Transmits engine power from the crankshaft to the rear variator via the CVT belt to drive the vehicle.

🏁 Acceleration Performance

Roller weight and slider design directly affect launch response and acceleration smoothness.

⛽ Fuel Economy

Optimized CVT characteristics keep the engine in its optimal RPM range across different conditions, improving fuel efficiency.

⚠️ Symptoms of Front Variator Failure: Jerky or slipping during takeoff, poor acceleration, inconsistent shifting, belt slipping noise, reduced top speed, increased fuel consumption, abnormal noise from worn rollers. If these issues occur, inspect and replace the front variator assembly promptly.

📦 Kit Contents

This front variator assembly includes all components for a complete replacement:

Drive Face

Variator

Pressure Plate

Sliders

Pressure Spring

Roller Weights

20mm x 15mm (6 pcs)

✨ Product Features

OEM Specification Standards: Manufactured to GY6 original specifications with 19-spline design for perfect fitment.
Complete Kit: Includes all variator assembly components — no additional parts needed for installation.
High-Quality Materials: Variator constructed from high-strength aluminum alloy with surface hardening treatment for durability.
Precision Machining: Drive face belt contact surface is precision-machined for smooth belt operation.
Includes Roller Weights: Kit includes 20mm x 15mm roller weights (6 pieces) with standard weight configuration.
Direct Replacement: Drop-in replacement for worn or damaged original variator assembly, restoring CVT performance.

🔧 Installation Guide

1. Ensure the engine is cool and disconnect the negative battery terminal before starting.
2. Remove the CVT cover and use a variator holding tool to secure the front variator, then remove the retaining nut.
3. Remove the old variator assembly and clean the crankshaft splines and transmission case interior.
4. When installing the new variator assembly, ensure the splines align and the drive face faces outward.
5. When installing roller weights, pay attention to orientation (if rubber-coated, follow OEM direction).
6. Tighten the retaining nut to the specified torque (typically 40-50 N·m).
7. When installing the CVT belt, note the direction (follow arrow markings if present).
8. After installation, start the engine and check for smooth operation and unusual noises.

⚠️ Important Notice: This product is the WH 125cc Front Variator Assembly, designed for 125cc GY6 1P53QMI engines with 19-spline crankshaft. Widely compatible with various Chinese-made 125cc GY6 scooters and ATVs.
Spec Confirmation: Before purchasing, verify your crankshaft has 19 splines and a 15mm shaft diameter to ensure compatibility.
Installation Caution: Variator assembly installation involves the CVT system. Professional installation is recommended. Pay attention to roller weight orientation during installation and torque the retaining nut to specification. Product images are for reference only; please refer to the actual product.

🔧 Compatibility Notice

Please verify that this part fits your specific vehicle model and year. Many vehicles share similar names but use different components depending on year or market region.
We strongly recommend cross-checking with your vehicle's owner's manual or contacting us for confirmation before placing your order.

📄 Product Disclaimer

Product images, measurements, and descriptions are for reference only. Slight variations in color or appearance may occur due to manufacturing batches or photography lighting—functional specifications remain identical to the ordered part.
Professional installation is mandatory. Mortch Motor assumes no liability for damages, injuries, or losses resulting from improper installation, misuse, unauthorized modification, or abnormal operation.

💰 Import Duties & Taxes

All listed prices EXCLUDE shipping costs, import duties, taxes, and customs clearance fees. These charges (if applicable) are determined and collected by your local customs authority and are solely the buyer's responsibility.
In case of return due to unpaid duties/taxes or refusal to clear customs, the buyer shall bear the original shipping cost, return shipping fees, and any associated administrative charges deducted from the refund.

📌 Order Confirmation: By completing your purchase, you acknowledge that you have read, understood, and agreed to all terms above. For any questions, please contact our support team prior to ordering.