SmartCarb For Yamaha YZ125X

Name: SmartCarb For Yamaha YZ125X
SKU: SC2-36-YAM125X
Availability: InStock

$674.10 – $853.20

Wake your YZ up!

This 36mm SC2 model SmartCarb replaces the stock carburetor in stock bore or big bore (144cc) Yamaha YZ125X dirt bikes, offering crisp, clean performance, notable bottom end torque, and tool-free tuning.

MagVolt® Throttle Position Sensor option recommended for bikes equipped from the factory with TPS for 3D ignition mapping (2023+). Click or swipe through the photos to view the Type 1 and Type 8 connectors. Select the type that matches the connector type attached to your stock carburetor.

Every SmartCarb ships pre-adjusted specifically for the bike for which it is ordered. Please provide information in the forms below about any engine/exhaust modifications, how you ride (riding style), and what fuel selection and oil premix ratio you use.

Questions about compatibility, sizing, or fitment? Contact Us!

Products shipping internationally may be subject to import duties/taxes.

MagVolt® Throttle Position Sensor

Color Options

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Confirm Year *

Engine/Exhaust Modifications *

Riding style(s) *

Fuel Selection/Oil Ratio (if applicable) *

SKU: SC2-36-YAM125X Categories: Offroad 2-Strokes, Yamaha 2-Strokes

Description

This SC2 SmartCarb replaces the stock Yamaha YZ125X carburetor. It is a precision metering instrument that provides extremely fine fuel atomization, precise mixture control, and air density compensation in a single circuit, jet-less fuel system.

CNC billet aluminum construction
Patented single fuel circuit design
Extremely fine fuel atomization
Optimal air/fuel ratio control
Designed & manufactured in the USA

Learn more about How It Works

Performance Guarantees

The SC2’s patented variable venturi shape focuses airflow directly at the metering rod, maximizing fuel atomization and combustion efficiency at all throttle positions.

8-10% increase in horsepower & torque
25-30% greater average fuel economy
30-50% reduction in emissions outputs (2X EPA certified)
Crisp, clean throttle response & substantial top end overrev
No compromises

Remarkable Simplicity

The SC2 SmartCarb is externally adjustable track or trail-side in seconds. Patented, internal float bowl venting provides unmatched air density compensation.

Tool-free, external adjustability – in seconds!
Automatic air density compensation (elevation, temperature, even boost)
NO jets & NO more jetting
Integrated venting system – no dangling vent lines
Zero fuel spillage

Fitment Information

This SmartCarb accepts the stock throttle cable.

An airboot trim IS REQUIRED for proper SmartCarb float bowl venting. The Yamaha YZ125 factory airboot has an in-molded rubber lip that can block the SmartCarb’s vent scoop, negatively affecting air density compensation and fuel flow assist at higher throttle positions. No obstruction is permissible. Trimming may be performed during installation with an x-acto knife or a dremel tool.

The MagVolt® TPS system is plug-and-play and clips into the same connector as the stock TPS. No adjustments or calibrations required. Short throw throttle cams or tamers are not recommended for TPS equipped bikes.

The stock carburetor may have a secondary two wire connection for an electronic power jet. Leave it disconnected and protect it from dirt/water by taping it up. Zip tie it out of harm’s way.

View the Quick Start Guide (included with your purchase).

SmartCarb For Yamaha YZ125X

Wake your YZ up!

Description

Performance Guarantees

Remarkable Simplicity

Fitment Information

Reviews

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