YSS MX VINTAGE TWIN SHOCK HUS 79-80

Product Details – YSS Rear Shock Absorber Set Eco Line for Husqvarna OR390 (1979–1980)

This pair of adjustable YSS rear shock absorbers from the Eco Line series is specifically designed for the Husqvarna OR390 (1979–1980) with a wheelbase of 420 mm. Each unit features a gas pressure shock absorber with an external piggyback upper reservoir, a black inner tube, and a black spring and reservoir – ensuring both performance and a classic look.

Performance & Features

The YSS Eco Line combines affordability with reliable gas shock performance. Equipped with an adjustable threaded spring preload, it allows precise adaptation to the rider’s needs and weight. This model ensures maximum comfort, stability, and grip on any terrain while improving control and ride balance.

Adjustment Options

• Spring preload: Adjustable via threaded collar for fine-tuned suspension setup
• Gas damping system: Provides consistent performance and heat resistance
• External piggyback reservoir: Enhances cooling and maintains damping stability during extended use

Technical Specifications

• Model: YSS Eco Line
• Type: Gas shock absorber with external piggyback upper reservoir
• Top mounting: Eye Ø 12x22 mm
• Bottom mounting: Eye Ø 8x24 mm (spacing 11+13 mm)
• Spring: 46-20-40-300
• Spring preload: Threaded adjustment
• Piston diameter: 36 mm
• Rod diameter: 12 mm
• Wheelbase length: 420 mm
• Color scheme: Black spring, black inner tube, black reservoir

The YSS Eco Line is the perfect choice for riders seeking a durable, stylish, and customizable suspension solution for their vintage Husqvarna – offering modern damping performance with authentic looks.