1970
- First Yamaha motorcycle mounting a 4-stroke engine "XS1" released
- Yamaha Motor do Brasil Ltda. (YMDB) founded in Brazil
1971
- Won snowmobile manufacturer title at Eagle River World Championship competition (U.S.)
- Haraban Motor Co. founded in Indonesia in tie-up with Haraban Co. and local production of motorcycles begun in Indonesia
1972
- Headquarters moved to present location in Iwata City
- First win in Motocross World GP at Round 10, Swedish GP (250cc class)
- First win in Motocross WGP Round 11, Luxembourg GP (500cc class)
1973
- Yamaha Motor Canada Limited (YMCA) founded in Canada
- Signed joint venture agreement with Brunswick Co. (U.S.) and Brunswick invests in Sanshin Industries
- Won first manufacturer and rider titles in 250cc class of the Motocross World GP
- Yamaha wins 1st All Japan Trial Championship
- First Yamaha portable generator model "ET1250" released
- First Yamaha racing kart model "RC100" released
1974
- Hisao Koike appointed second YMC president
- Won manufacturer titles in all classes of road race World GP, 125cc, 250cc, 350cc, and 500cc
- PT. Yamaha Indonesia Motor Manufacturing (YIMM) founded in Indonesia as motorcycle parts maker
- Manufacture and sales of FRP pools begun
- Membership type comprehensive recreation facility "Tsumagoi" opened in Kakegawa City, Shizuoka Pref.
1975
- "C7 Campaign" launched with aim of reducing cost by 7%
- Sportsland SUGO opened in Shibata-gun, Miyagi Pref.
- First Yamaha golf car model "YG292" released
- Wing of Yamaha wins 1st Single-handed Transpacific Yacht Race
1976
- First Yamaha industrial robot model, an "arc welding robot" released
- First Yamaha marine diesel "MD35" released
1977
- YMC-related divisions of Yamaha International Corporation separated to found Yamaha Motor Corporation, U.S.A.
- Yamaha "DT100E" and "XS650E" are top models in the industry to clear the U.S. 1978 emissions regulation
- The "soft bike" model "Passol" released
- Captures manufacturer and rider titles for the first time in 500cc class of the Motocross World GP
1978
- R&D Minnesota opened in U.S. as Yamaha Motor's first overseas R&D center
- First Yamaha land car model "G1-AD" released
- First Yamaha snow-thrower model "YT665" released
1979
- Industrial robot "CAME" developed an introduced on YMC production lines
- Yamaha's first All Terrain Vehicle (ATV) model "YT125" released in the USA
- XT500 wins 1st Paris-Dakar Rally
- Energy saving 4-stroke engine system Yamaha Induction Control System (YICS) developed
- Sino-Japanese friendship "Guangzhou Yamaha Exhibition" held (China)