I was riding my mountain bike and the plastic to shifter broke now it wont shift at all. how do i fix that?

1. Gather the Necessary Tools and Parts

- Pliers

- Screwdriver

- Replacement shift lever

2. Remove the Broken Shift Lever

- Shift the derailleur to the largest cog.

- Pull the cable housing through the clamping bolt on the derailleur.

- Use a screwdriver to loosen the clamp bolt on the shifter that holds the shift lever in place.

- Remove the broken shift lever

3. Replace the Shift Lever

- Insert the new shift lever into the clamp

- Tighten the clamp bolt to secure it in place.

4. Adjust the Cable Tension

- If necessary, adjust the cable tension to ensure the derailleur is shifting properly.

5. Test the Shifter

- Shift the derailleur through all the gears and ensure it is shifting smoothly.

Here are some additional tips and considerations:

- Make sure that you have the right size and type of replacement shifter for your bike.

- When installing the new shift lever, ensure it is properly aligned with the other levers on your bike.

- When adjusting the cable tension, do so gradually until the derailleur is shifting smoothly and without any skipping.

- If the shifter was completely broken you will need to put a new cable and housing.

By following these steps, you can successfully replace the broken shifter on your mountain bike and get it back in working order.