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| {{DISPLAYTITLE:{{PAGENAME}}: history, specs, pictures}}
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| {{Motorcycle
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| |name = Yamaha GT80
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| |photo=1973-Yamaha-GTMX-Silver-5282-0.jpg
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| |aka = GT80/MX
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| |manufacturer = Yamaha
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| |parent_company =
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| |production = 1973 - 1980
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| |model_year =
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| |predecessor =
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| |successor =
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| |class = Enduro
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| |engine = single cylinder, two-stroke
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| |bore_stroke = 47.0mm x 42.0mm
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| |compression =
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| |top_speed = 57 mph (91 km/h)
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| |power =
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| |torque = 4.5 ft/lbs (6.1 Nm) @ 7200RPM
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| |fuel_system = carburetor. teikei
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| |ignition = points type ignition
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| |spark_plug = {{sparkplug|NGK B7HS}} '73-80 <ref name="wps_street_2019">{{cite book|title=2019 Western Power Sports Catalog|publisher=[https://www.wps-inc.com/catalogs Western Power Sports]|date=2019}}</ref>
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| |battery = {{battery|YUASA 6N4-2A-5}} '73-80 <ref name="wps_street_2019"/>
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| |transmission = Gear box: 4-speed <br>
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| Clutch: wet plate <br>
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| |final_drive = {{chain|420x}}
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| |frame =
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| |suspension =Front: inverted forks <br>
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| Rear: non-adjustable dual shock
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| |brakes =Front: expanding [[brake]] (drum brake) <br>Rear: expanding brake (drum brake)
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| |front_tire = {{tire|2.50-15}} '73-80 <ref name="wps_street_2019"/>
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| |rear_tire = {{tire|2.75-14}} '73-80 <ref name="wps_street_2019"/>
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| |rake_trail =
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| |wheelbase =
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| |length =
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| |width =
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| |height =
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| |seat_height =
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| |dry_weight = 130.07 pounds (59.0 Kg)
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| |wet_weight = 60.3 kg
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| |fuel_capacity = 1.3 Gallon (4.92 Liters)
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| |oil_capacity =
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| |recommended_oil=Yamalube 10w-40
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| |fuel_consumption =
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| |turning_radius =
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| |related =
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| |competition =
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| }}
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| The '''[[Yamaha]] GT80 B''' was a single cylinder, two-stroke standard produced by [[Yamaha]] in 1975. It could reach a top speed of 57 mph (91 km/h). Max [[torque]] was 4.5 ft/lbs (6.1 Nm) @ 7200 RPM.
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| ==Engine==
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| The engine was a [[air cooled]] single cylinder, two-stroke. A 47.0mm [[bore]] x 42.0mm [[stroke]] result in a [[displacement]] of just 72.0 cubic centimeters.
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| ==Drive==
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| The bike has a 4-speed transmission. Power was moderated via the wet plate.
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| ==Chassis==
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| It came with a 2.50-15 front [[tire]] and a 2.75-14 rear tire. Stopping was achieved via expanding brake (drum brake) in the front and a expanding brake (drum brake) in the rear. The front suspension was a inverted forks while the rear was equipped with a non-adjustable dual shock. The GT80 B was fitted with a 1.3 Gallon (4.92 Liters) fuel tank. The bike weighed just 130.07 pounds (59.0 Kg).
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| ==1973==
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| <gallery mode='packed-hover'>
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| File:1973-Yamaha-GTMX-Silver-5282-0.jpg|left|thumb|1973 Yamaha GTMX in Silver
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| File:1973-Yamaha-GTMX-Silver-5282-1.jpg|left|thumb|1973 Yamaha GTMX in Silver
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| File:1973-Yamaha-GTMX-Silver-5282-2.jpg|left|thumb|1973 Yamaha GTMX in Silver
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| File:1973-Yamaha-GTMX-Silver-5282-3.jpg|left|thumb|1973 Yamaha GTMX in Silver
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| File:1973-Yamaha-GTMX-Silver-5282-4.jpg|left|thumb|1973 Yamaha GTMX in Silver
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| File:1973-Yamaha-GTMX-Silver-5282-5.jpg|left|thumb|1973 Yamaha GTMX in Silver
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| File:1973-Yamaha-GTMX-Silver-5282-6.jpg|left|thumb|1973 Yamaha GTMX in Silver
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| </gallery>
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| <br style="clear: left"/>
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| ==1978== | | ==1978== |
| <gallery mode='packed-hover'>
| | [[Image:1978-Yamaha-GT80E-Red-0.jpg|left|thumb|1978 Yamaha GT80E in Red]][[Image:1978-Yamaha-GT80E-Red-1.jpg|left|thumb|1978 Yamaha GT80E in Red]][[Image:1978-Yamaha-GT80E-Red-2.jpg|left|thumb|1978 Yamaha GT80E in Red]][[Image:1978-Yamaha-GT80E-Red-3.jpg|left|thumb|1978 Yamaha GT80E in Red]][[Image:1978-Yamaha-GT80E-Red-4.jpg|left|thumb|1978 Yamaha GT80E in Red]][[Image:1978-Yamaha-GT80E-Red-5.jpg|left|thumb|1978 Yamaha GT80E in Red]][[Image:1978-Yamaha-GT80E-Red-6.jpg|left|thumb|1978 Yamaha GT80E in Red]][[Image:1978-Yamaha-GT80E-Red-7.jpg|left|thumb|1978 Yamaha GT80E in Red]] |
| File:1978-Yamaha-GT80E-Red-0.jpg|left|thumb|1978 Yamaha GT80E in Red
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| File:1978-Yamaha-GT80E-Red-1.jpg|left|thumb|1978 Yamaha GT80E in Red
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| File:1978-Yamaha-GT80E-Red-2.jpg|left|thumb|1978 Yamaha GT80E in Red
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| File:1978-Yamaha-GT80E-Red-3.jpg|left|thumb|1978 Yamaha GT80E in Red
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| File:1978-Yamaha-GT80E-Red-4.jpg|left|thumb|1978 Yamaha GT80E in Red
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| File:1978-Yamaha-GT80E-Red-5.jpg|left|thumb|1978 Yamaha GT80E in Red
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| File:1978-Yamaha-GT80E-Red-6.jpg|left|thumb|1978 Yamaha GT80E in Red
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| File:1978-Yamaha-GT80E-Red-7.jpg|left|thumb|1978 Yamaha GT80E in Red
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| File:1978-Yamaha-GT80E-Silver-Blue-2686-0.jpg|left|thumb|1978 Yamaha GT80E in Silver/Blue
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| File:1978-Yamaha-GT80E-Silver-Blue-2686-1.jpg|left|thumb|1978 Yamaha GT80E in Silver/Blue
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| </gallery>
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| <br style="clear: left"/>
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| ==1980==
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| [[Image:1980-Yamaha-GT80-Red-0.jpg|left|thumb|1980 Yamaha GT80 in Red]]
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| [[Image:1980-Yamaha-GT80-Red-1.jpg|left|thumb|1980 Yamaha GT80 in Red]]
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| [[Image:1980-Yamaha-GT80-Red-2.jpg|left|thumb|1980 Yamaha GT80 in Red]]
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| <br style="clear: left"/>
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| ==1981==
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| [[Image:1981-Yamaha-GT80-Blue-2610-0.jpg|left|thumb|1981 Yamaha GT80 in Blue]]
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| [[Image:1981-Yamaha-GT80-Blue-2610-1.jpg|left|thumb|1981 Yamaha GT80 in Blue]]
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| [[Image:1981-Yamaha-GT80-Blue-2610-2.jpg|left|thumb|1981 Yamaha GT80 in Blue]]
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| [[Image:1981-Yamaha-GT80-Blue-2610-3.jpg|left|thumb|1981 Yamaha GT80 in Blue]]
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| <br style="clear: left"/> | | <br style="clear: left"/> |
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| == References ==
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| {{reflist}}
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| {{Yamaha}}
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| [[Category:Yamaha motorcycles|GT80, Yamaha]]
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| [[Category:standard motorcycles]]
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| [[Category:1970s motorcycles]]
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