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HT1

Category: Enduros
Manufacturer: Yamaha show models
Hits: 878
Year 1970
Engine Class 90
VIN Prefix HT1
Known VIN Range (Vehicle ID Numbers) 200101--214450
Tank Color(s) Candy Orange
Country of Sale USA
Bore (MM) 50
Stroke (MM) 45.6
Displacement (CC) 89
Compression Ratio (to 1) 6.8
BHP @ RPM 8.5 @ 8,000
Autolube Injection? Yes
Engine Cooling Air
Carburetor Model VM20SC
Ignition Type Magneto
Ignition Timing MM (BTDC) 1.8
Primary Drive Gearing 3.9
Final Drive Gearing (Sprockets) 49/14
Box Gearing First 3.18
Box Gearing Second 2.0
Box Gearing Third 1.37
Box Gearing Fourth 1.0
Box Gearing Fifth 0.8
Fuel Capacity (L) 6.5
2 Stroke Oil Tank Capacity (L) 1.2
Gearbox Oil Capacity 0.75
Front Tire (stock) 2.75 x 18
Rear Tire (stock) 3.00 x 18
Front Brake Type Drum
Rear Brake Type Drum
Rear Suspension Twin Shock
Overall Width (mm) 900
Ground Clearance (mm) 225
Wheelbase (mm) 1,220
Dry Weight (kg) 85
Voltage 6 Volt
Carburetor Type VM20SC
Main Jet 85
Needle Jet N-6
Jet Needle 4D3-3
Slide Cutaway 2.0
Pilot Jet 30
Air Screw (turns out) 1.75
Starter Jet 40
Float Level (mm) 22.5

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