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How To Add Oil To Your Dirt Bike Forks - Step-By-Step Procedure

Last updated on 06-Nov-2023 , By Saleh

If you own a dirt bike, it's important to have regular maintenance of its various components to ensure optimal performance and longevity of the bike. Here one of the most critical parts to pay attention to is the suspension system, specifically the front forks of the bike.

Changing and adding oil to the dirt bike forks is a necessary step to keep them functional. It’s a relatively straightforward process, and with the right tools and a bit of patience, you can get the job done even at home. Therefore, here we have a step-by-step guide on how to add oil to your dirt bike forks. Let's get started.

How To Add Oil to Your Dirt Bike Forks - Step-By-Step Procedure

First, you need to prepare for the oil-changing task of your dirt bike. Make sure your bike and the areas where you’re working are completely clean of dirt and dust. Also, ensure that the bike is on a pit stand or a lift stand to lift the front wheel off the ground.

Secondly, you need to gather the necessary supplies to perform the maintenance job. To add oil to your dirt bike forks, you will need to remove the front wheel, brake caliper, and the forks from the triple-tree clamp. Therefore, make sure you have the necessary tools to complete this task. Before you begin, gather the essential tools and supplies listed below:

Tools and Equipment

  • A clean, properly illuminated, and well-ventilated workspace.
  • A torque wrench and other tools to uninstall and reinstall the fork.
  • The right amount and grade of fork oil according to the manufacturer's recommendation.
  • A bowl or pan to collect the used oil.
  • A fork oil syringe or measuring cup.
  • Some cotton rags or shop towels.

Remove the Forks from Your Dirt Bike

Once you have everything prepared, start by removing the front wheel and brake caliper. Then, loosen or remove the fork bolts one by one that hold the forks in place. Carefully remove the forks from your dirt bike to avoid scratching the fork barrel. Keep track of the bolt positions and any spacers, bushings, or other components that may come loose during the process.

Loosen the Fork Cap and Drain the Old Oil

Secure the forks upside down in a vise after detaching them from the dirt bike clamp. Loosen and remove the fork cap and pour out the old oil into a drain pan. Move the fork piston in and out several times to ensure proper disposal of the used oil from the fork barrel. Additionally, if necessary, keep the fork barrel upside down for a few moments to drain out the last drop of used oil.

Refill with New Oil

After draining out the last drop of oil, you are ready to refill the fork barrel with fresh oil. Set the fork barrel upright in the vise and clean the barrel mouth with a cotton rag. Take the recommended amount of the manufacturer's recommended grade of oil in an oil syringe or measuring cup and carefully refill the barrel with it.

Reassemble the Forks

After refilling the oil, carefully attach the fork cap using the manufacturer's recommended torque specifications. If necessary, you may also replace the fork seal if it shows signs of wear. Carefully reassemble the forks, making sure to fix any spacers or bushings that came loose during the disassembly process. Finally, tighten every bolt with a torque wrench following the manufacturer's recommended specifications.

Test the Suspension

Once you have reassembled both forks, it's important to test the feedback of the forks. Lower the bike from the pit stand and gently push and bounce the bike to observe the forks' compression and rebound feedback. Check for any leakage around the cap or seal area. If everything looks clean, then you are done with the job and can take a test ride by getting the bike out of your garage.


So, as you can see, changing and adding oil to your dirt bike forks is not a tough job at all. However, it is an important part of maintaining your dirt bike's suspension system. It not only prevents further premature seal wear but also ensures the optimum performance of the suspension system. So, follow the steps outlined above and enjoy smooth riding for years to come.

Published by Saleh

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