Can the fluid in motorcycle forks be refilled?

11
Arne Reynolds asked a question: Can the fluid in motorcycle forks be refilled?
Asked By: Arne Reynolds
Date created: Sat, May 8, 2021 11:40 PM
Date updated: Sun, Jul 3, 2022 5:54 AM

Content

Top best answers to the question «Can the fluid in motorcycle forks be refilled»

How to check fork oil level while still on bike?

  • Pulling out the springs is not difficult on the bike. Put it on the centerstand and weight the rear down. Loosen both the caps, pull up the front wheel about 2", crack the locking nut under the cap and screw off the cap. Then you can pull the springs off, lift the front wheel all the way and check the fork oil level.

FAQ

Those who are looking for an answer to the question «Can the fluid in motorcycle forks be refilled?» often ask the following questions:

🚗 Are motorcycle forks pressurized?

Inverted Telescopic — There are five types of the inverted telescopic showa motorcycle forks: Pressurized separation type — As the name suggests, the damper is pressurised, which will drastically boost performance. It is the reason why motocross models use this type of fork.

🚗 Are motorcycle forks universal?

Why do you need a fork on a motorcycle?

  • The majority of motorcycle forks are designed to incorporate the front suspension and braking system while allowing the front wheel to rotate about the steering axis during maneuvering. Besides dampening the shocks from road irregularities, your fork can define the handling and style of your machine.

🚗 Leaking front forks motorcycle?

Try inserting a thin feeler gauge down the side of the fork leg inside of the fork seal. It may just be a small piece of grit lodged there that causes the leak and the feeler gauge will move it and solve the problem.

10 other answers

As the owner manual says, the fork oil should be drained and refilled every 10,000 miles travelled, or once in a year. While other motorcycle owner manuals might recommend a different interval on when you should change the fork oil, the distance frequency would still be around 10,000 miles to 20,000 miles range.

ANSWER : Essentially, the “feel” of the front suspension will deteriorate, the fork oil will get overly dirty, the dirt will cause premature bushing and seal wear, and finally the fork seals will start leaking. Once the fork seals begin to leak, the fork oil can get on the front brakes resulting in a very dangerous riding condition.

If they are leaking that bad sounds like it time for new seals and a overhaul. If you can't remember the last time you changed the oil then it is time for a overhaul. A teaspoon worth of oil for a leak can look like a lot, but won't really effect any thing. If the forks seem extra pogo-ey then you have no fluid damping them

I'll check out the Mobil 1 ATF. I need something heavier than 7wt BMW fork oil. 10wt should be good. Also, I might expirement with mixing ATF and a little hydraulic fluid. I can always drain the forks. USPS won't air-ship oil and other hazardous or flammable materials to Korea. I went to the Seoul BMW dealership, but their fork oil is in bulk ...

There are usually two amounts of oil to put in the forks. One amount is a "dry" amount to add when you disassemble the forks and then refill them. The "wet" amount is for when you simply drain the forks and then refill them. Naturally, the "wet" amount will be less than the "dry" amount.

Tip them upside down to get the fork oil out. Now with the forks empty from fluid and springs you will compress the forks all the way to make them as short as possible. You will need a fork dampening tool or a air gun to split the forks by removing the bolt inside the fork tubes. Once this is achieved you can pull the forks apart and replace the fork seals.

It depends on the type of forks you have, old damping rod style or the more modern cartridge forks. Damping rod forks typically use a heavier grade fluid of around SAE20 which in fact is in the range of most regular ATF's (not the LV variety) than the cartridge types which require like 5-10. That's the biggest factor.

FWIW, you do not need to "disassemble" the fork to drain and flush the fluid. Just pull the fork cap (under pressure from the fork spring) pull the springs and spacers out, and turn them over and pump. Flush with clean tranny fluid and repump. Put them back in the trees and refill.

A ligher rider could use 5w fork fluid, where a heavier rider might prefer going with 15w and the average rider might use 10w. But you don't know where the ATF falls in that spectrum. With fork fluids you know what you put in the forks and can make changes if so desired for your ride.

Fork Oil Servicing Manufacturers normally recommend each fork be drained, flushed and refilled with new oil every 10,000kms. More frequent changes may be deemed necessary if the motorcycle is operating consistently under dusty, wet or racing conditions. Carefully follow the change procedure recommendations set out in the motorcycle service manual.

Your Answer

We've handpicked 24 related questions for you, similar to «Can the fluid in motorcycle forks be refilled?» so you can surely find the answer!

How long do motorcycle forks last?

The very best way to keep your forks at their best is to service them. While every two years would be ideal, assuming they have no problems, every three to four years (unless you're on track or riding an awful lot) should be fine.

How much oil in motorcycle forks?

The front fork oil capacity varies across motorcycles depending upon the manufacturer and the model. Typically, the motorcycles will have the front fork oil capacity in the range of 100 ml to 200 ml (0.025 to 0.050 gallons).

How much to replace motorcycle forks?

How much does it cost to replace Fork seals?

  • Even if you only need to replace one seal, replace them in pairs to keep them on equal footing. The parts are usually under $20. Be sure to calculate how much oil you'll need.
How to remove forks from motorcycle?

How to restore the forks of a motorcycle?

  • Restoring Motorcycle Forks 1 Remove the Forks. The first step is to remove the forks… 2 Disassemble the Forks. This process will also be covered in a shop manual… 3 Removing the Old Finish. These forks were clear coated from the factory… 4 Start Sanding. Sand, sand, and sand some more… 5 Time to Polish…
Motorcycle clutch fluid leak?

It could be from the fitting, the clutch line, or the master cylinder itself due to leaking seals. If you clean it up really well and inspect it very closely, it may become apparent where the leak is coming from. If it's from the master cylinder seals, which is the most likely cause, it will need to be rebuilt.

Is motorcycle brake fluid different from car brake fluid?

There is no difference in the motorcycle brake fluid and the car brake fluid. The motorcycle and the automotive fluid are one and the same. Both the car and the motorcycle use the same brake fluids. A DOT4 brake fluid used in a motorcycle is exactly the same DOT4 brake fluid used in a car.

Is motorcycle brake fluid different than car brake fluid?

Both the car and the motorcycle use the same brake fluids. A DOT4 brake fluid used in a motorcycle is exactly the same DOT4 brake fluid used in a car… Within the brake fluids, there are different types – DOT 3, DOT 4, DOT 5, DOT 5.1 etc. These type of brake fluids have different boiling points and usability.

Can i straighten forks on a motorcycle?

Yes they can be straightened to a certain degree. I do them but if they have any bends in them, you cannot straighten them. If they are too close to the bottom, they are trashed and no one can straighten them.

How much to re chrome motorcycle forks?

Can a motorcycle fork be replaced with hard chrome?

  • If your motorcycle forks have corrosion, pitting or scoring and the seals are leaking then these forks can no longer do their job. The options are, replace the fork tubes or let Rad Hard Chroming repair your forks with Hard Chrome to better than new. Rad Hard Chroming can refurbish both upside down and conventional fork stanchions.
How often should you service motorcycle forks?

Suspension tuners recommend fork oil be changed around 20 hours for maximum performance. But unless your a sensitive rider, or pretty serious racer, once a season is usually plenty fine.

How to fix leaking forks on motorcycle?

How do you fix a blown seal on a motorcycle?

  • You’ve just blown a seal…insert 8th-grade joke here. If you are out on the trail there are a few ways to do a temporary or maybe a permanent fix. If you have upside-down forks this is a lot more important cause, well, gravity, liquid, etc. Firstly pop the dust seal out and slide it down the fork leg.
How to raise front forks on motorcycle?

What happens when you raise the front fork on a motorcycle?

  • But raising the front fork by the same amount will do just the opposite, increasing rake and wheelbase. This results in more stability, especially at higher speeds, at the cost of increased effort to initiate and maintain a turn.
How to remove pitting from motorcycle forks?

A rough guide to getting your Harley forks back to their best and getting rid of the pitting common on these great bikes.

Where to buy the best motorcycle forks?
  • At jpcycles.com, you’ll find only top brands of motorcycle forks like Arlen Ness, Performance Machine, Custom Cycle Engineering, Pro-One, CycleVisions, and more.
Can i use motor oil in motorcycle forks?

ATF is close to most 7-10w oils. If you must, use that as your damper oil. For straight lubricating oil (like in the lowers of a Fox 40), motor oil is just fine.

How are the forks removed from a motorcycle?
  • Forks are removed form chrome bath thoroughly rinsed and all masking material removed The forks are then finish ground to the original size, or resized to suit bushings or outer leg sizes. After grinding the forks are finished and polished to give the required surface finish.
How to restore the forks of a motorcycle?
  • Restoring Motorcycle Forks 1 Remove the Forks. The first step is to remove the forks… 2 Disassemble the Forks. This process will also be covered in a shop manual… 3 Removing the Old Finish. These forks were clear coated from the factory… 4 Start Sanding. Sand, sand, and sand some more… 5 Time to Polish…
Is it bad to leave motorcycle forks compressed?

First is simple, the springs being constantly compressed might 'take' and not have the strength or extension they had. Second is pressure in the fork will cause damage to the seal. When the fork is compressed, the air column above the oil is pressurized, leaving pressure on the oil against the seal.

What are the different types of motorcycle forks?
  • There are two principal types of motorcycle forks: 1 Conventional motorcycle forks, with the fork tube at the top and the sleeve at the bottom, and. 2 Upside-down motorcycle forks (sometimes written as USD forks… no, that doesn’t mean you have to pay for it in US Dollars!) with the fork tube at the ...
What are upside down forks on a motorcycle?
  • Upside-down motorcycle forks (sometimes written as USD forks… no, that doesn’t mean you have to pay for it in US Dollars!) with the fork tube at the bottom, and its sleeve at the top Upside-down forks started to be used a lot in the early 2000s.
What oil do you put in motorcycle forks?

Any hydraulic or ATF fresh oil is best than any old fancy motorcycle fork oil. So regular maintenance is the key.

Which is the best brand of motorcycle forks?
  • At jpcycles.com, you’ll find only top brands of motorcycle forks like Arlen Ness, Performance Machine, Custom Cycle Engineering, Pro-One, CycleVisions, and more.
How to bleed brake fluid motorcycle?

Squeeze the brake lever (front), then loosen the bleeder valve approximately 1/4 turn. Once the lever compresses all the way in to the grip, close the bleed valve, then release the lever. Repeat this process as necessary to work fluid/air out of the system. Keep a close eye on fluid levels in the reservoir.

How to check motorcycle brake fluid?

How to correctly check your motorcycles front and rear brake fluid levels 2019 - YouTube. How to correctly check your motorcycles front and rear brake fluid levels 2019. Watch later. Share.