Yamaha YSR50

{{Infobox Motorcycle

| name = Yamaha YSR50

| image = YAMAHA YSR50 1986 Yamaha Communication Plaza.jpg

| aka =

| manufacturer = Yamaha Motor Company

| production = 1986–1992

| predecessor =

| successor =

| parent_company =

| class =

| platform =

| engine = {{cvt|49.3|cc|abbr=on}}, two-stroke, air-cooled, single

| transmission = 5-speed manual

| rake =

| trail =

| wheelbase = {{cvt|41.4|in|abbr=on}}

| length =

| width =

| seat_height =25.59 inches (650mm)

| dry_weight =165.35lbs (75kg)

| wet_weight =

| fuel_economy =

| fuel_capacity = 2.1 gallons

| related =

| similar = Yamaha TZM-50, Honda NSR-50

}}

The Yamaha YSR50 is a miniature motorcycle that was produced and sold by Yamaha during the late 1980s and early 1990s. The bike featured an air-cooled {{cvt|50|cc|abbr=on}} two-stroke engine. The engine was sometimes swapped out for a larger variety.{{cite magazine|url=https://books.google.com/books?id=zRgEAAAAMBAJ&pg=PA73|title=Other techie daredevils|first=Julie |last=Bort|magazine=Network World|date=July 2002|page=73}}

Its first production year was 1986, and it was last made in 1992. American Motorcyclist magazine stated its top speed was {{cvt|38|mph|abbr=on}}.{{citation|first=Greg |last=Harrison|date=February 1987|title=Of Mice And Men: Sreamin' meemies in the North Georgia mountains|page=16|work=American Motorcyclist}}