The Birdy folding bike is known for its compact size and advanced engineering. However, over time, the pivot bushes in the bike’s fork may wear out and need to be replaced. Fortunately, replacing these bushings is a relatively simple process that can be done at home with just a few tools.
Step 1: Start by removing the front wheel from the bike and disconnecting the brake caliper if necessary. Then, loosen the stem clamp bolts and remove the handlebar and stem assembly from the fork.
Step 2: Next, use a 5mm Allen key to remove the bolt securing the top cap of the fork. Once the top cap is removed, you can slide the fork out of the head tube.
Step 3: With the fork removed, use a 4mm Allen key to remove the two bolts holding the pivot bushes in place. Once these bolts are removed, the old bushings can be pulled out of the fork.
Step 4: Before installing the new pivot bushes, clean the inside of the fork legs and apply a small amount of grease to ensure smooth operation. Then, insert the new bushings and secure them with the bolts.
Step 5: Reassemble the fork by sliding it back into the head tube and tightening the top cap bolt. Then, reattach the handlebar and stem assembly, making sure to tighten the stem clamp bolts securely.
Step 6: Finally, reinstall the front wheel and reconnect the brake caliper if necessary. Give the bike a quick test ride to ensure that the new pivot bushes are functioning properly.
By following these steps, you can easily replace the pivot bushes in your Birdy folding bike’s fork, restoring its smooth and efficient operation. Remember to always double-check your work and consult the bike’s manual if you have any doubts or questions. Enjoy your newly refreshed ride!
Step 1: Gather the necessary tools
Before you begin replacing the birdy fork pivot bushes, it’s important to gather all the necessary tools. Having the right tools will make the process easier and smoother. Here are the tools you will need:
1. Allen wrench set:
An Allen wrench set is essential for loosening and tightening bolts. Make sure you have a set that includes different sizes to fit the various bolts on the birdy fork pivot.
2. Pliers:
Pliers will come in handy for gripping and holding components while you work. They can also be used to remove stubborn bolts or bushings.
3. Hammer:
A hammer is useful for tapping on parts to loosen them or remove them from their position. It can also be used to gently tap the new bushes into place.
4. Grease:
Grease is necessary for lubricating the pivot bushes and ensuring smooth movement. Make sure you have enough grease to fully coat the new bushes.
5. Cleaning materials:
Before installing the new bushes, it’s important to thoroughly clean the pivot area. You will need rags or paper towels to wipe away any dirt or debris.
Make sure you have all these tools ready before starting the replacement process. This will help you avoid unnecessary delays or trips to the store.
Step 2: Remove the old bushes
Once you have gathered all the necessary tools and equipment, it’s time to start removing the old pivot bushes from your birdy fork. Follow these steps carefully:
1. Loosen the pivot bolts
Use a suitable wrench or allen key to loosen the pivot bolts that hold the fork and bushes in place. Make sure to keep track of the bolts and any small parts that may come off with them.
2. Slide out the old bushes
Gently slide out the old bushes from their housing. If the bushes are stuck, you may need to use some penetrating oil and apply gentle pressure to encourage them to come out.
3. Clean the fork and housing
Before installing the new bushes, make sure to clean the fork and housing thoroughly to remove any dirt, debris, or old lubricant. This will ensure a smooth installation and operation of the new bushes.
Now that you have successfully removed the old bushes, you are ready to move on to the next step: installing the new bushes.
Step 3: Clean the fork pivot area
Before replacing the pivot bushes, it’s important to clean the fork pivot area to ensure smooth operation of the suspension system. Here are the steps to follow:
1. Remove any dirt and debris
Start by thoroughly cleaning the area around the fork pivot using a brush or compressed air. Be sure to remove any dirt, mud, or debris that may have accumulated.
2. Use a degreaser
Apply a degreaser to the fork pivot area to remove any grease or old lubricant. Let it sit for a few minutes to allow the degreaser to penetrate and loosen any stubborn dirt.
3. Scrub with a brush
Using a brush or a toothbrush, scrub the fork pivot area to remove any remaining dirt or grime. Pay attention to hard-to-reach corners and crevices.
4. Rinse with water
Rinse the fork pivot area thoroughly with water to remove all traces of the degreaser and dirt. Make sure to use a gentle stream of water to avoid damaging any sensitive parts.
By following these steps, you’ll have a clean and ready-to-go fork pivot area, ensuring smooth and efficient operation of your birdy fork.
Step 4: Install the new bushes
Once you have removed the old bushes from the birdy fork pivot, it is time to install the new ones. Follow these steps to properly install the new bushes:
- Inspect the new bushes to ensure they are free of any defects or damage.
- Apply a thin layer of lubricant or anti-seize compound to the inside surface of the new bushes.
- Insert one end of the bush into the pivot hole on one side of the fork.
- Gently tap the bush into place using a rubber mallet or a similar non-metallic tool. Be careful not to damage the bush or the fork during this process.
- Repeat steps 3 and 4 for the other bush on the opposite side of the fork.
- Ensure that both bushes are inserted fully and seated properly in their respective pivot holes.
- Check the alignment of the bushes and make any adjustments if necessary.
- Double-check all the installation steps to ensure everything is properly installed and secured.
Once you have completed these steps, the new bushes should be securely installed in the birdy fork pivot. You can now proceed to the next step in the process.
Step 5: Reassemble the fork
Once you have replaced the birdy fork pivot bushes with new ones, it’s time to reassemble the fork. Follow these steps to ensure a proper reassembly:
- Place the lower fork leg on a flat surface and insert the spring into the fork tube. Make sure it is seated properly.
- Slide the upper fork leg onto the fork tube, aligning the bushing holes on both legs.
- Insert the pivot bushing pin through the aligned holes, making sure it goes through both fork legs.
- Tighten the pivot bushing pin using a wrench or adjustable spanner until it is secure.
- Reattach any additional components, such as the brake caliper or mudguard, that were removed during the disassembly process.
- Double-check that all the components are securely tightened and properly aligned.
- Finally, take the birdy fork for a test ride to ensure everything is functioning smoothly.
Following these steps will help you properly reassemble the birdy fork with the new pivot bushes, ensuring that your fork functions optimally and provides a smooth riding experience.
Step 6: Test the replacement
After successfully replacing the birdy fork pivot bushes, it is important to test the replacement to ensure everything is functioning properly. Follow these steps to test the replacement:
- Mount the birdy fork back onto the bicycle, making sure it is securely attached.
- Adjust the fork’s tension and compression settings according to your preferences.
- Take the bicycle for a short test ride to see if the new pivot bushes provide a smooth and stable ride.
- Pay attention to any unusual noises, vibrations, or wobbling during the test ride.
- Observe the fork’s performance while going over bumps or rough terrain.
- If everything feels and sounds normal, the replacement is successful.
If you notice any issues during the test ride, such as excessive play, stiffness, or harshness in the fork’s movement, it may indicate a problem with the replacement. In such cases, it is recommended to double-check the installation and consult a professional bike mechanic if necessary.
