Motorex Fuel System Cleaner

Motorex Fuel System Cleaners: Swiss Precision for Every Engine

Motorex has been engineering high-performance lubricants and chemical care products since 1947, and the brand's Swiss roots run deep in everything it produces. Motorex-Bucher Group AG is a Swiss family-owned company with over 100 years of formulation expertise, and that heritage is on full display in its focused lineup of fuel system cleaners and additives designed specifically for motorcycle and powersport engines.

What sets Motorex apart in the fuel system cleaner category is the brand's motorsport-driven development philosophy. Motorex builds race products for professional and factory race teams worldwide, and those same insights are baked into consumer-grade fuel system products. The result is a lineup engineered to the same exacting standards demanded on the world's most competitive tracks.

Key Products: System Guard & Carburetor Clean

Motorex's fuel system offering centers on two core products. The Motorex System Guard is a concentrated fuel additive that cleans and dissolves deposits throughout the entire fuel injection system, improves corrosion protection, and binds water — making it suitable for both gasoline and diesel injection systems, as well as 2-stroke and 4-stroke engines with or without a catalyst. The Motorex Carburetor Clean Spray is designed to optimally clean all fuel system components, removing varnish and deposits that accumulate in carburetor passages and jets over time.

Motorex also offers an Ethanol Treatment additive that improves the properties of 2- and 4-stroke fuels blended with ethanol (E10–E85), reduces phase separation, optimizes combustion, and stabilizes fuel for extended storage periods — a critical consideration for seasonal riders and off-road enthusiasts storing their machines over the winter.

Why Motorex Fuel Additives Stand Out

Unlike generic fuel additives, Motorex products are developed as part of a comprehensive moto-focused additive line engineered to avoid and prevent operating faults that affect performance and engine longevity. Importantly, all Motorex additives have been tested with catalytic converters and particle filters, so riders with modern, emissions-controlled machines can use them with confidence. The entire product range is manufactured in Switzerland, with on-site development laboratories ensuring consistent formulation quality batch after batch.

• Cleans and dissolves injection and carburetor deposits
• Binds moisture to prevent corrosion within the fuel system
• Compatible with 2T and 4T engines, gas and diesel
• Catalytic converter and particle filter safe
• Ethanol treatment available for E10–E85 blended fuels
• Fuel stabilization for long-term storage

Whether you ride a high-revving sportbike, a hard-working dirt bike, or a touring machine that sees thousands of miles a season, Motorex's fuel system cleaner products are formulated to keep your fuel delivery system running at peak efficiency. Explore the full Motorex brand catalog or browse all fuel system cleaners to find the right solution for your engine.