About the Yamaha YSR50
Small dimensions make accurate brake, fork and control identification especially useful on a YSR50.
Yamaha’s 1986 YSR50 combined scaled-down race-bike styling with an air-cooled two-stroke single, a five-speed transmission and a front disc brake. The replacement examples here use their own later year applications. Keep the 50 model identity and fitted chassis details when comparing parts for a restored or modified mini-sport bike.
Check the front end as a group of distinct service parts
At the front wheel, match the pad shape to the installed caliper. At the steering head, compare the stem, bearing races and seals. The pads and fork seals list 1987–1992, but the steering kit stops at 1990 and starts in 1988. A front-end conversion therefore needs more than the original frame year to identify its replacement parts.
Know your YSR50 before choosing partsYSR50 repair checkpoints
Use the model, year and fitted component together when comparing these applications.
Front disc brake
1987–1992 pad application
Match the front caliper and pad outline. These are front disc pads, not rear drum shoes.
Steering head
1988–1990 kit application
Check the frame-head and stem bearing seats. The kit’s range is narrower than the pad and seal examples.
Fork and lever
Compare the fitted small-bike components
The selected oil seals measure 27 × 39 × 10.5 mm. Match the lever pivot and perch separately from the fork.
Identify your motorcycle before orderingYSR50 identification checklist
- Frame and model
- Record the complete stamped model and frame/VIN characters.
- Engine and fitted assembly
- Record engine markings separately, then compare the component being repaired.
- Assembly comparison
- Compare the fitted assemblies with the correct model-year parts diagram or service manual, especially when an engine, carburetor, wheel or front end has been replaced.
Contact PartsNMore with the model year, frame and engine markings, and component photos.