Stopper, Shift Cam

The gear-change mechanism, including the selector forks and the other parts of the assembly will, sooner or later, require some remedial work to ensure that the gear-change is accurate and nicely 'snappy' rather than hit and miss with a sloppy, imprecise action. The more parts you can afford to replace with new zero wear items, the better, ultimately, the results will be.
This component and some of those listed below will give you an idea of what maybe required for a satisfactory outcome:

2521135F00
2523135F00
2523117E11
2541126D01
2541124F00
2545135F00
2531040F00
2538113E10
2535535F01
2551035F01
2551213E11
2567135F00
0916014016
2552024F00
2552024F10
2552505A10
2560033E00
2560033E00P
0914006011
3773035F10
0712005163
071200516B

The more of the worn or damaged parts that are replaced the better the results.

Add as many new items as you wish to the same shopping cart, new pin 0422104089 and gearshift cam bolt 2531242F00 for example, and still only pay the same single fixed price shipping cost.