The YS 120SRX is the latest evolution of YS’s legendary high-performance helicopter engines, offering major improvements over the previous YS 120SR. Engineered for elite 3D performance, the SRX delivers stronger power output, smoother throttle response, improved efficiency and exceptionally consistent performance across the entire RPM range. With a redesigned internal structure and refined tuning characteristics, this engine is built for pilots who demand extreme precision, reliability and maximum power in competition-level nitro helicopters.

Lightweight at just 544g and boasting a strong 19.93cc displacement, the YS 120SRX is the perfect upgrade for 700-class nitro helis, providing unmatched punch, crisp response and excellent mid-range stability. Supplied complete with YS’s high-quality check valve and dedicated glow plug, this engine is ready to install and fly.

Key Features

• Latest-generation YS 120 series helicopter engine

• Improved performance, response and efficiency over the YS 120SR

• Ideal powerplant for modern 700-class nitro helicopters

• Smooth, strong and reliable 2-stroke performance

• Lightweight design for improved balance and agility

• High-precision manufacturing for consistent tuning

• Includes YS check valve and glow plug

Perfect For

• 700-class nitro 3D helicopters

• Competition and advanced aerobatic flying

• Pilots wanting maximum power and reliability

• Replacing or upgrading from the YS 120SR

• High-performance nitro heli setups

Product Summary

A powerful, refined and highly reliable 2-stroke nitro engine designed for 700-class RC helicopters. The YS 120SRX offers significant improvements in power, throttle feel and stability over the older YS 120SR, making it the perfect choice for serious 3D and competition pilots.

Specifications

• Displacement: 19.93cc

• Bore: 30.38 mm

• Stroke: 27.5 mm

• Weight: 544 g

Included in the Box

• YS 120SRX Heli Engine

• Instruction Manual

• YS Heli Check Valve

• YS P0020 (2-Stroke) Glow Plug

Why Buy From ProBuild Aircraft Ltd

• ✅ Official UK YS Stockist – 100% Genuine Products

• ✅ Trusted by Top International RC Pilots

• ✅ Fast UK Shipping & Secure, Protective Packaging

• ✅ Expert RC Engine Knowledge & Support

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