How to change the fork oil seal?

Le joint spi this is the so-called lip seal, the main function of which is to guarantee the tightness of the part to which it is attached. It takes its name from the Société de Perfectionnement Industriel, the company that developed it. On the fork, oil seals play a big role in the proper operation of a two-wheeler. If there are streaks of oil at the junction between the inner tube and the fork leg, it's time to replace them.

Removing and disassembling the fork with appropriate tools.

Before thinking about change oil seals forks motorcycle, it is recommended that you balance your bike and remove any objects that may be in your path. This allows you to operate in complete safety.

Stacking and removing various elements

The first step in the operation fork oil seal replacement start by loosening various elements such as pipe plugs, fork clamps, etc. You must then properly place the motorcycle on the block if it is not equipped with a center stand. You can use a block of wood under the exhaust manifold, under the lower sump, or under the frame. And to access the fork, you remove the front wheel, brake calipers, fender, speedometer cable, etc.

Disassembly and disassembly of the plug

After your two-wheeled motorcycle is safely lifted and all obstructions are removed, you remove the fork tubes by pulling down and making small rotational movements. When the plug is removed, it is necessary to unscrew the caps, applying a slight back pressure. Even with the fork springs removed, they remain under slight pressure. You can then remove the spacer tubes, spring cups, etc. To avoid possible errors when reassembling, it is a good idea to record their position and assembly order.

Emptying the cartridge and removing the plug seals

An indispensable component of a two-wheeled vehicle, the fork provides the connection between the front wheel and the ground. Its various components are immersed in oil to prevent premature wear. Thus, oil seal leakage reduces driving comfort and safety.

Emptying the cartridge into the oil collection pan

There are usually two methods for emptying the fork. The first is to use the drain screw and the second is to remove the sheath. To drain the water from the fork, all you have to do is completely remove the nut located on the fork tube. Because of the pressure, he can be kicked out and lost. Before removing, it is recommended to wrap it with a cloth. Then you unscrew and remove the spring.

Replacing damaged fork oil seals

To delete oil seals forks damaged, you can use a screwdriver. First, you slide the dust cover. Then you remove the retaining rings that hold them in place. Strip off the gaskets if necessary. At the same time, it is necessary to check the condition of the O-rings and guide bushings. If worn, it is best to replace them before reassembling. Professional advice may be helpful.

Installing new seals and filling the plug

Change oil seals forks the motorcycle ends with the installation of new gaskets and the pouring of the fork. It is not recommended to use sharp objects for this.

Installing new fork oil seals

Before installing your spi joints, it is advisable to lubricate their outer surface and sealing lip. The aim is to make them easier to slide in the dip tube without damaging them. They can be easily inserted using a pinhole punch. It is best to use a professional fork seal wrench if you have one. Press the new seals in until the circlips are back in the groove.

Filling the fork with fork oil

In order for your motorcycle fork to maintain its original performance, it is important that you usefork oil the same viscosity and in the same amount. If it sags during hard braking, it means that the fork springs also need to be replaced. You do not need to fill the fork with more viscous oil. In fact, fork oil is mainly used for damping and shock absorption while driving.