If you own a dirt bike then you will already appreciate the stress that the bike is under when riding. Alongside all the bumps and rough terrain, your bike will also be dealing with dirt and debris, all of which can be damaging to a bike.
This is one of the reasons it is advisable to clean your bike down regularly. The stress on the bike is also a top reason to change your engine oil regularly, something that you probably already do.
But, have you considered changing the fork oil in your bike? Providing the seals are not damaged the oil will stay comparatively clean, making you think it is not necessary. However, regardless of whether you have chosen the best Kawasaki bikes or another dirt bike, the oil will gradually lose its damping effect.
This is due to the constant movement of the suspension, driving the forks up and down. Each time the fork oil is squeezed the carbon and hydrogen chains in the oil are compacted and damaged. Ultimately they will lose their ability to absorb shocks and you’ll notice the difference.
Take the front Wheel Off
If you have a centre stand this is very easy, simply put the bike on its centre stand. If not, you’ll need a stand that supports the rear-end of your dirt bike. With the front wheel in the air, you’ll be able to loosen the bolts holding the wheel in place. Then, loosen the brake caliper bolts, allowing the wheel to slide out from between the forks.
You may need to remove other attachments, such as mudguards.
Taking The Forks Off
The first thing to do is loosen the top plugs on the forks. This is not necessary to remove the forks but it is a lot easier to do while the forks are attached to the bike than afterwards.
You can then unbolt the pinch bolts at the top and bottom of the forks, these are the ones that hold the forks in position. Once they are loosened you should be able to slide the forks out carefully. It’s important not to drop them.
Take the Top Plug Out
It’s best to support the fork in an upright position as you remove the top plug, the one you previously loosened. Under this plug will be spacers and washers. You need to remove these and remember the order they are fitted in.
You can then lift the spring out, it is inside the fork and should be easy to access. Hold it for a few moments to let the oil drain off the spring and into the fork.
Drain The Oil
Invert the fork and you can let the oil drain out into a suitable container. When all the oil is out spray a little brake cleaner in to encourage the rest of the oil out. Then, leave it dripping until it is completely dry.
You’ll then be ready to add fresh oil. Make sure you use the type specified by the bike manufacturer and check the height of the oil inside your fork.
Once done, you can put the fork back together and bolt it back onto your bike. It’s simply a reverse of what you have just done.
