141.1 mpg‑US (1.667 L/100 km; 169.5 mpg‑imp) at 25 mph
75.1 in (1,910 mm)
The Yamaha AT1 is a single cylinder enduro/adventure bike produced by Yamaha motor company from 1969-1971. The AT1 was marketed towards beginners due to its small engine size and the fact that it had electric start.
The Yamaha AT1 was available in three different models, each corresponding to the year of production. 1969 Yamaha AT1, 1970 Yamaha AT1B, 1971 Yamaha AT1C. Each year the AT1 was also available in the Motocross edition designated by an M. The M models were very similar to the regular models other than a few performance enhancing features, such as weight reduction, higher compression ratio, tuned exhaust, larger carburetor with 26 mm throttle bore, tuned gearing ratio, etc.
Engine and transmission
Bore & Stroke
56 x 50mm
Electric for Enduro Versions and kick starter
Models and VIN
AT1 1969 Pearl White
AT1-100101 to AT1-119829
AT1M 1969 MX Version Pearl White
AT1-300101 to AT1-303790
AT1B 1970 Competition Yellow
AT1-120101 to AT1-138890
AT1M-B 1970 MX Version Competition Yellow
AT1-310101 to AT1-312326
AT1C 1971 Brilliant Red
AT1-139101 to AT1-162879
AT1M-C 1971 MX Version Brilliant Red
AT1-313101 to AT1-317191
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