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Questions and answers about sports

Leaking fluid/oil on front left fork

6 min read

Asked by: Stacy Bosley

Why is my front fork leaking oil?

Fork seals leak from normal wear and tear, age, and debris getting into the seals. Imperfections and nicks in the chrome can also make your fork seals leak. However, the majority of the time your fork seals are leaking it’s simply because debris is caught in the seal holding it open and allowing fork oil to sneak by.

Is it normal for fork oil to leak?

It’s common for the forks to leak a little. The longer it continues, the more risk of damaging the bike. Because of this, you should get the forks replaced as quickly as possible. Oil leaking from a fork seal is a sign of larger issues with the suspension.

Can I ride with a leaking fork seal?

You should notride with a bad fork seal for many reasons, safety being number one. A bad fork seal could leak oil onto your brake calipers, resulting in trouble decelerating and stopping the bike. That, plus poor shock absorption and an unbalanced ride makes a leaky fork seal dangerous to ride on.

How do you stop a front fork seal from leaking?

Quote from video: Clean any dirt or oil off the dust seal. And slide it down to the bottom of the fork. To clean in the area of the oil seal wrap a rag around the flat blade screwdriver.

How much does it cost to fix fork seals?

Replacing your fork seals may cost anywhere from $50 up to $500, depending on whether you do the work yourself or take it to a mechanic. The parts are not very expensive, so most of the charge will depend on how much you pay for labor.

Is it hard to replace fork seals?

Replacing your fork seals is an easy enough job if you know a few tricks. The first step to any DIY job is to do a little research and get all the parts you’ll need for the job. You’ll at least need the new seals and fork oil but should also consider wipers, bushings and any seals or o-rings for the caps.

What causes shocks to leak oil?

The main reason that shocks or struts leak is that the upper seals wear or become damaged causing hydraulic fluid to leak out of the top. Actually, vehicle use rarely causes leaks.

Is a leaking fork seal an MOT failure?

If fork oil can be wiped off the chromed slider then the fork seal(s) is/are blown. The same check applies to the rear suspension. In both cases leaking oil means a test failure. Forks seals can be replaced.

How much does it cost to get motorcycle forks rebuilt?

Cost: $150 – $400



Motorcycle shops and dealers costs vary greatly depending upon where you live geographically but from the feedback we hear from our customers is they were quoted as low as $150 and as high as $400 to have a shop fully remove the forks and replace the fork seals.

How do you add fork oil without removing forks?

Insert the syringe tip into the air-bleed hole so that it has a good seal; if it doesn’t, oil will leak out without going into the fork. Remove the O-ring from the air-bleed screw and put it back in the hole to seal the syringe better. Slowly squirt 10cc of oil into the forks.

How often should motorcycle fork oil be changed?

Usually, the change interval for the fork oil ranges from 10,000 miles to 20,000 miles depending on the motorcycle manufacturer and model. A general replacement rule of changing the fork oil every 10,000 miles or annually should keep the front suspension in good working condition.

How do you fix a leaky fork on a dirt bike?

Quote from video: And just gently rotate the upper tube. And gently fall chram to pull that dust seal down our third step is inserting our Rhino gently insert that into our oil seal.

How do you check if fork seals are leaking?

Quote from video: Basically all you need to do is take your bike. Like so hold your front brake. In just flex and out on the forks. You can already feel with this bike that the suspension is kind of loose.

How much does it cost to get the front fork seals replaced?

The replacement cost can be between $200 to $400 per time, and if you need to do this frequently throughout the year, it could add up to about $800 to $1600 per year that you spend on replacing these components on your bike.

How do you change fork seals?

Remove the old seal.

  1. Wedge the dust seal from the fork leg.
  2. Find the fork seal itself. It is held into place by a clip within a groove.
  3. Pry the seal out carefully.
  4. Flush the area as you go to remove debris within the fork.
  5. Take the tube in 1 hand and the stanchion in the other. Use muscle to pull the 2 apart.


How do you tell if front fork seals are leaking?

Quote from video: Down your fork leg or tube or around the brakes what will happen is if your fork seals are leaking it'll leak onto your brakes your brake pads. And you'll have no more front brakes.

What causes shocks to leak oil?

The main reason that shocks or struts leak is that the upper seals wear or become damaged causing hydraulic fluid to leak out of the top. Actually, vehicle use rarely causes leaks.

What happens if suspension oil leaks?

The oil can leak on to the disc caliper and can cause accident. The forks will become hard over time and instead of less price, only for oil seals. You might have to change the fork rods and head bearings too later on.

How do you fix a leaky fork on a dirt bike?

Quote from video: And just gently rotate the upper tube. And gently fall chram to pull that dust seal down our third step is inserting our Rhino gently insert that into our oil seal.

How much does it cost to replace fork seals on a dirt bike?

between $200 and $400

Replacing fork seals on a dirt bike can cost you between $200 and $400 depending on your bike and the shop you take the bike to for the job. Costs can be reduced by doing the job yourself, but this is time-consuming, or you can perform regular maintenance on the seals to extend their lifespan.

How do you fix a blown fork seal?

Quote from video: On. So got up you just put it in rotate it in lightly. Just spin it around it's got some good finger grip set it to spin it around just give it to two laps and then slide it up.