Yamaha AT1

Yamaha AT1
Manufacturer	Yamaha
Production	1977-1985
Class	dual-purpose motorcycle
Successor	Yamaha AT2
Engine	125cc two-stroke single-cylinder
Top Speed	60 mph
Spark Plug	NGK B8ES or NGK B9ES
Battery	YUASA 12N7-3B `70-72
Final Drive	Chain: 428x112
Front Sprocket	14T
Rear Sprocket	45T
Front Tire	3.25-18 `70-72
Rear Tire	3.50-18 `70-72
Weight
Recommended Oil	Yamalube 10w-40
Competition	Honda SL175 Kawasaki F6 (125) Kawasaki KS125
Manuals	Service Manual

The Yamaha AT1 was a 125cc, 2-stroke, dual-purpose motorcycle manufactured by Yamaha from 1970 through 1972.

The AT1 had a raised rear fender but no raised front fender, a raised exhaust, handlebars with cross members, universal tires, and adequate ground clearance for an off-road-enduro motorcycle or trail motorcycle.

1969

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  1969 Yamaha AT1 Enduro

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  1969 Yamaha AT1 Enduro

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  1969 Yamaha AT1 Enduro

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  1969 Yamaha AT1 Enduro

AT1

• Start Engine#: AT1-100101

AT1M

• Starting Engine#: AT1-300101

1970

AT1B

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  1970 Yamaha AT1B in Yellow

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  1970 Yamaha AT1B in Yellow

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  1970 Yamaha AT1B in Yellow

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  1970 Yamaha AT1B in Yellow

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  1970 Yamaha AT1B in Yellow

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  1970 Yamaha AT1B in Yellow

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  1970 Yamaha AT1B in Yellow

• Starting Engine#: AT1-120101

AT1B MX

• Starting Engine#: AT1-310101

1971

AT1C

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  1971 Yamaha AT1 in Red

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  1971 Yamaha AT1 in Red

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  1971 Yamaha AT1 in Red

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  1971 Yamaha AT1 in Red

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  1971 Yamaha AT1 in Red

• Starting Engine#: AT1-139101

AT1MX

• Starting Engine#: AT1-313101

1972

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  1972 Yamaha AT1 125 in Orange

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  1972 Yamaha AT1 125 in Orange

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  1972 Yamaha AT1 125 in Orange

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  1972 Yamaha AT1 125 in Orange

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  1972 Yamaha AT1 125 in Orange

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  1972 Yamaha AT1 125 in Orange