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Honda ATC90 1973 Parts & Accessories

First introduced in 1970 as the US90 and renamed the Honda ATC90 (All-Terrain Cycle) in 1973, this iconic machine effectively launched the popular three-wheeler and modern ATV industry. Designed by Honda engineer Osamu Takeuchi to provide a year-round, low-cost recreational vehicle capable of navigating mud, sand, and snow, the ATC90 relied on balloon-like, ultra-low-pressure 22x11-8 tires instead of traditional suspension components to cushion the ride. Powered by a reliable, fan-assisted air-cooled four-stroke engine derived from Honda's horizontal step-through series, the machine featured a 4-speed transmission with a dual-range sub-transmission (giving eight forward speeds) and an automatic centrifugal clutch, making it accessible to riders of all skill levels.

• 89 cc air-cooled OHC 2-valve 4-stroke horizontal single-cylinder engine producing 7.0 HP @ 8,500 RPM
• 16 mm Keihin piston-valve carburetor with pull-rope recoil starter and magneto ignition
• Pressed-steel backbone frame with rigid front fork and rigid rear axle (no mechanical shock absorbers; cushioning provided by low-pressure tires)
• Low-pressure high-flotation knobby balloon tires (22x11-8) operated at approximately 2.2 psi (15 kPa)
• Rear mechanical drum brake mounted on the rear drive axle (no front wheel brake)
• 4-speed transmission with automatic centrifugal clutch and dual-range (High/Low) transfer gear selector yielding 8 forward speeds
• Enclosed chain final drive to a solid rear axle with a manual drive-disengage mechanism for towing
• 650 mm (25.6 in) seat height and 89 kg (196 lbs) dry weight / 93 kg (205 lbs) wet curb weight with a 6.1-litre (1.6 US gal) fuel tank capacity