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GT80B

Category: Minis
Manufacturer: Yamaha show models
Hits: 1414
Year 1975
Engine Class 80
VIN Prefix 393
Known VIN Range (Vehicle ID Numbers) 210101 to 214420
Tank Color(s) Competition Yellow
Country of Sale USA
Bore (MM) 47
Stroke (MM) 42
Displacement (CC) 72
Compression Ratio (to 1) 6.0
BHP @ RPM 4.9
Torque (kgm) @ RPM 0.6 @ 7,200
Autolube Injection? Yes
Engine Cooling Air
Carburetor Model Teikei Y16P-3
Ignition Type Magneto
Ignition Timing MM (BTDC) 1.8
Primary Drive Gearing 68/19 (3.578)
Final Drive Gearing (Sprockets) 41/14 (2.928)
Box Gearing First 30.064
Box Gearing Second 20.962
Box Gearing Third 14.973
Box Gearing Fourth 11.791
Fuel Capacity (L) 3.89
2 Stroke Oil Tank Capacity (L) .66
Gearbox Oil Capacity 500cc
Front Tire (stock) 2.50 x 15
Rear Tire (stock) 2.75 x 14
Front Brake Type Drum
Rear Brake Type Drum
Rear Suspension Twin Shock
Front Suspension Travel (mm) 102
Rear Suspension Travel (mm) 76
Rake (degrees) 32
Trail (mm) 68.58 mm
Overall Width (mm) 690.88
Ground Clearance (mm) 195.58
Wheelbase (mm) 1043.94
Dry Weight (kg) 58.97
Carburetor Type Teikei Y16P-3
Main Jet 90
Air Jet 2.5-3.0
Needle Jet 2.080
Jet Needle 049-2
Slide Cutaway 1.0
Pilot Jet 38
Air Screw (turns out) 2
Starter Jet 90
Float Level (mm) 23.0

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