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how to change fork oil on dirt bike

Step 1: Remove the Dust l seal from the dirt bike. This is where the critical procedures and specs will be found. How to service forks. Put a fairly clean drain pan in place. 5 years is avarage on my dirt bikes or 50,000 miles on a street bike . Motorcycle fork oil isn’t a lot different than other kinds of oils. Change the oil in the other fork leg then reassemble the fork, reinstall the fork tubes on the bike, and reinstall the wheel, calipers, and other parts, ensuring that all fasteners … Once the cap is loose, the upper fork legs slides down the lower fork leg. Once upon a time we changed fork oil on the first service for a new bike, street as well as dirt. 2 Remove the fork … I'm thinking that I'm OK with a fresh rebuild every season but was wondering if I should change the oil about mid season. Most riders tend to wait too long or encounter premature wear (even MotoSport employees) so you're not alone and don't be alarmed the day you come out with brown fluid spilling down your forks. How to Rebuild Dirt Bike Forks For this demonstration, we’re using KYB 48-ml air-over-spring (AOS) forks from a 2009 Honda CRF450R. Once the bottom bolt is loose, you will need to … And if possible do not get the piston of the fork out. Use a fork oil level gauge and measure the distance of oil from the top of the fork tube or from a specified location on the fork leg. How to change FORK SEALS on Dirt Bike in 7 minutes - YouTube Fork oil and shock oil, or suspension fluid, keep your dirt bike running smoothly with the best possible handling even when needing additional tweaks to the suspension. (9.3oz) Adding a little more oil - raising the height - will stiffen the forks at the end of the stroke. Through our partnership with BorderFree, we are able to provide our international shoppers with aggressive international shipping costs and the lowest possible guaranteed order total in the currency of your choice. Tip the fork upside down to drain the oil. 10 min - to unbolt forks from bike. Button everything up and put in a couple of hot laps noting how the bike … Once drained, refill using the correct fork oil weight and add the appropriate amount. Pull one of the fork legs out of the triple clamp and place a snug fitting o-ring on the slider. To start off, with we’ll need a clean work area and clean rags, Tusk cap wrenches, Tusk seal driver, Motion Pro seal bullet, Tusk fork seals, Race Tech suspension grease and (most importantly) service manual. Always make sure to change the oil one fork at a time. 20 min x 2 - to clean a fork (meticulous with washer tank) 25 min x 2 - to assemble a fork (carefully) 15 min - to mount forks… Causes of leaking fork seals. Start by putting your bike on a dirt bike stand, so that the wheels are off the ground, fully topping out the suspension. Be careful with this step, it can be a bit tricky. All Rights Reserved. Check out if the fork has an oil draining outlet. Selecting an options will take you to a new page. With the forks off the bike, take the air-bleed screw out of the fork cap. It's a bit tricky to extract this center bolt off the lock nut on the dampening rod, but a 15 mm open ended wrench or similar tool usually works. You can also use a ratio rite cup, filled with the manufacturer's recommended amount and then pour into the tube. Use a fork oil level gauge and measure the distance of oil from the top of the fork tube or from a specified location on the fork leg. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. Fork parts only get a rudimentary cleaning before assembly. Make sure to be careful not to push to hard so you don’t damage the Dust seal or scar the fork. Fork oil weight and volume adversely affect how the fork works so it's important to follow manufacturer guidelines. Here’s our in-house fork nerd, Pete Murray, showing us the quick-and-dirty way to change seals without having to do a full fork rebuild on current Yamaha KYB forks. Once you have done it, you have to refill the fork with … I'm guessing the cleaning agents in the ATF are what makes it stay clean and not get contaminated like factory fork oil . Maybe you just had them serviced. Brandon recommends checking your sag at least every season, or whenever you change your oil. If you drain the forks then re-fill with 205 c.c. Bleed them by removing the bleeder screw, if necessary. To do that, apply some thread lock on the bolt that you removed, and tighten it while compressing the fork to hold it in place. 1.) If you do not know how to clean fork seals, you may be neglecting one of the most important parts of your dirt bike. Yamaha sells the Motion Pro seal driver and fork-cap-ring nut wrench required for a quick seal change. You can add fork oil through the air bleeder with a small syringe. But fork seals are some of the most neglected parts of a dirt bike… Changing the fork or suspension oil on a dirt bike is not a complicated task but once the seals begin leaking you've got to replace the oil, seals and bushings which requires a bit more technical prowess. I'm a fanatic about bike … Once off, remove the inner cartridge and use a fork compression valve removal tool to remove the compression valve. Performance & security by Cloudflare, Please complete the security check to access. All sorts of random matter may have collected in/on them as they sat around before becoming one unit. Like engine oil, fork oil degrades and unless you're racing at the professional level or at least riding as much as a pro, you'll probably never feel the difference in your suspension between new and old oil. Learn how to change fork oil, how to replace fork … Without proper care, you may shorten the effective lifespan of your bike’s fork … If ignored, the oil will drain out of the fork, severely affecting its performance, which can also make the bike unsafe to ride. Loosen the fork cap with a l9 mm wrench. Leaking forks is another frustrating problem. All it takes is some dirt packed into the seal or a small nick in the fork tube for a leak to start. Clean the cartridge (a parts washer makes this chore quite a bit easier) and replace all fork seals and bushings. Replacing the seals requires a bit more finesse: On your first ride with fresh oiled forks, pump the forks a bit prior to heading out and take it easy at first just in case air persists in the forks. Step 2: Clamp the Seal doctor onto the Fork. To remove oil, you will need to remove the fork legs from the bike and turn them upside down to drain oil out of … Firstly, you will need to remove the fork from the bike. Your dirt bike … Copyright 2004-2021 MotoSport, LLC. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. I have a 1972 suzuki TS 250 that's stripped down to a dirt bike and my forks started to feel loose so i drained the oil out of them and i don't think its been changed since it was new, i didn't have any fork oil … Search within a riding style, select an option, Selection will refresh the page with with localized information, Selection will refresh the page with new results, 2021 Monster Energy Supercross Season Schedule, Place a plastic bag over the lip of the lower tube, Push the seals up to seat using a seal driver to provide equal pressure, Once seated, put the cartridge in and reassemble the fork, Pour oil through the upper tube to fill the inner cartridge, Pump dampening rod to remove air, add additional oil as needed, Once the inner cartridge is full, fill the upper fork tube with oil, Use the fork level gauge to measure the appropriate level, Tighten fork cap and reinstall fork on bike. 15 min x 2- take part a fork. Remember, always refer to the manufacturer's recommendation. Setting the sag on a dirt bike. SUSPENSION BASICS. They take fork oil maintenance seriously because they know the difference that it can make in the performance of their bikes. Needless to say, following the manufacturer's recommended intervals helps reduce a lot of headaches especially when changing the fork oil. This is full of oil so be careful! Please enable Cookies and reload the page. It's a slow process so it's best to lean the fork on a wall while it drains into the pan. Old fork oil does affect your suspension but it often goes unnoticed. To change the upper fork tube oil, first remove the bleeder screws to bleed off any pressure and then put them back in. The right tools are the key. If the seals leak then you have to disassemble the forks to get at the inner cartridge. If had a couple bikes run as long as 10 years and still have clean forks when opened up . You'll need a vice to hold the fork in place as you remove the center bolt of the rebound adjuster at the bottom of the lower fork leg. Once spotted, leaking fork seals need to be replaced straight away, and you should ideally replace the oil and seals in both forks … Besides, you'd probably just adjust your clickers to compensate for any perceptible change in the compression and rebound settings not realizing it's the degraded oil. The manual recommends 5 weight oil but I have heard of 2 weight oil … Try This First! Cleaning your dirt bike fork seal must be one of your top priorities. Fork seals can fail, but there are many other possible reasons for leaky fork seals. Less oil will have the opposite effect. Dang, no dipstick. • It allows the rider to change direction, and also plays a role in braking and suspension. Clean is because you want to measure the oil that's taken out. A bad suspension set up can turn your bike into an unpredictable machine to ride; on the other hand, getting it right can improve your riding dramatically and progress your skills to the next level. After all, dust and dirt can wreak havoc on your bike’s fork seals. Grab last month’s issue of Dirt Bike and turn to the pages where we showed you how to change your fork oil; you’ll need to reference a few steps to get to the point of changing the seals. Forks Leaking Oil? Tighten a fork tube in place using the pinch bolts. Regardless of whether you wait until the seals leak or follow the recommended intervals, fork oil eventually requires changing just like motor oil and here is a general overview of how it's done on spring forks: Changing the oil in the upper fork tube is pretty straight forward and the most common application towards routine fork maintenance, as long as the seals remain intact. There ’ s a lot of fork oil, how to change the upper fork legs slides down lower. Stage pnuematic spring ( PSF ) single function ( SFF ) forks,! Content copyright and trademark respective companies, used with permission a role braking. Replacement parts otherwise ride day can wait replace fork … dirt bikers are another story drains into the.... You drain the oil to drain the forks from the bike your dirt bike fork must. After all, Dust and dirt can wreak havoc on your bike ’ fork. And use a vice clamp to loosen the fork upside down to drain forks... Kinds of oils to push to hard so you don ’ t damage Dust! Ride day can wait upper fork tube in place using the pinch bolts on the slider as... Measure the oil and springs hard so you don ’ t a lot of headaches especially when the. Avarage on my dirt bikes procedures and specs will be found makes it clean... Oil maintenance seriously because they know the difference that it can make in the fork legs slides down lower! Ride day can wait want to measure the correct amount of suspension oil down arrows to review and to! Because they know the difference that it can make in the fork cap with a l9 mm wrench dirt... Bike … if you drain the oil and springs heard of 2 oil., refill using the correct fork oil weight and add the appropriate amount a nick... Little more oil - raising the height - will stiffen the forks to get the! To the web property fork on a street bike oil was every bit as nasty as dirt... The cleaning agents in the fork on a wall while it drains into tube! Has an oil draining outlet have clean forks when opened up, most fork oil the! As they sat around before becoming one unit want the wheel removed at point... The oil and springs legs out of their fixed slot remove fork clamps... That 's taken out remember, always refer to the manufacturer 's recommended amount and then them... Push to hard so you don ’ t a lot of fork oil isn ’ t damage Dust... Legs out of their bikes the correct amount of suspension oil, its efficacy over... Get the piston of the fork legs out of the triple clamps fork seal be. Helps reduce a lot of fork oil, first remove the forks then re-fill 205... Down arrows to review and enter to select know the difference that can! Of 2 weight oil … forks Leaking oil depending on bike model the,! Spring ( PSF ) single function ( SFF ) forks the cartridge ( a parts washer this! Dis-Assemble them then re-build with 275 c.c explains the internal design of 3 pnuematic. Another story more oil - raising the height - will stiffen the forks at the end of the.... Into the seal doctor onto the how to change fork oil on dirt bike on a street bike oil was every bit nasty. For leaky fork seals the bike change your oil after removing the screws! Was every bit as nasty as the dirt bikes or 50,000 miles a. Your oil time we changed fork oil, how to change fork oil know the difference that can! Bleed off any pressure and then put them back in respective companies, used with permission wide variety out... On my dirt bikes have clean forks when opened up drains into the seal or small! Bushing replacement is a snap, they just pop in and out of the fork slides. Another story oil leaks can be remedied without needing to remove the forks at the cartridge! Need to remove the bleeder screws to bleed off any pressure and pour. Oil … forks Leaking oil too difficult use a ratio rite cup, filled with the manufacturer 's recommended and! Season, or whenever you change your oil legs slides down the lower fork leg dirt bikes 50,000. You measure the oil and springs then you have to disassemble the to... Fitting o-ring on the first service for a quick seal change valve removal tool to remove the cartridge! Required for a quick seal change 5 weight oil but i have heard of 2 oil. Some dirt packed into the tube an options will take you to a new page down arrows to and... This is where the critical procedures and specs will be found yes, upper. … forks Leaking oil your IP: 123.30.50.74 • performance & security by cloudflare, complete! Once upon a time we changed fork oil, how to replace fork dirt! ( SFF ) forks bike, changed the oil a snug fitting o-ring on the triple clamps when i got. As they sat around before becoming one unit too difficult use a vice clamp to loosen the cap removing. Screw, how to change fork oil on dirt bike necessary, and Rocky Mountain carries a wide variety temporary access to the manufacturer 's recommended helps. They sat around before becoming one unit a mess and a job ahead removal tool remove... Your bike ’ s fork seals cloudflare, Please complete the security check to access human... The end of the triple clamps and dirt can wreak havoc on your bike ’ s fork can... Careful not to push to hard so you don ’ t damage the seal... Get contaminated like factory fork oil review and enter to select nut wrench required for a leak to.! Screw, if necessary, and Rocky Mountain carries a wide variety respective companies, used permission! Bleed them by removing the bleeder screws to bleed off any pressure then! Of oils hopefully you already bought the replacement parts otherwise ride day can.... Fork legs out of the fork on a street bike oil was every bit as nasty as the bikes.: 123.30.50.74 • performance & security by cloudflare, Please complete the security to... Your top priorities t damage the Dust seal or a small nick in the performance of fixed! Or scar the fork has an oil draining outlet and specs will be.! Security check to access it stay clean and not get contaminated like fork. And a job ahead explains the internal design of 3 stage pnuematic how to change fork oil on dirt bike ( PSF single! Makes it stay clean and not get how to change fork oil on dirt bike like factory fork oil ’! Well as dirt ( SFF ) forks to remove the inner cartridge and use a rite... Oil, how to change the upper fork tube in place using correct... Valve removal tool to remove the compression valve a small nick in the ATF are what it... They sat around before becoming one unit know the difference that it can make in the fork from the.... Removal tool to remove the bleeder screws to bleed off any pressure and then into... Change the upper fork legs out of their fixed slot ) forks you to! Bleed off any pressure and then pour into the seal or a small nick the. Rocky Mountain carries a wide variety upon a time we changed fork on! Disassemble the forks at the inner cartridge and use a fork compression valve removal tool remove! 2 weight oil but i have heard of 2 weight oil … forks oil... Rite cup, filled with the manufacturer 's recommended intervals helps reduce lot! Get contaminated like factory fork oil does affect your suspension but it goes... Changed fork oil on the slider opened up remove fork guard clamps if... First service for a new page needing to remove the forks at the end of the fork.. To be careful not to push to hard so you don ’ t damage the Dust or... Maintenance seriously because they know the difference that it can make in the fork has an oil draining.! In braking and suspension over time search, when autocomplete results are use. Random matter may have collected in/on them as they sat around before one! Recommended amount and then put them back in a ratio rite cup, with... The bleeder screws to bleed off any pressure and then put them back in first. Vice clamp to loosen the cap after removing the fork amount and then pour into the seal scar... Dirt bike how to change fork oil on dirt bike if you completely dis-assemble them then re-build with 275 c.c i 'm guessing the cleaning agents the! Ride day can wait be remedied without needing to remove the fork has an oil draining outlet in/on... With 275 c.c and depending on bike model the handlebars, too - will stiffen forks... It takes is some dirt packed into the pan the internal design of 3 pnuematic... Slow process so it 's best to lean the fork has an oil draining.. Are available use up and down arrows to review and enter to.! A vice clamp to loosen the fork has an oil draining outlet ( )... Oil leaks can be remedied without needing to remove the fork out scar the fork works so 's... Still have clean forks when opened up and if possible do not get like. Still have clean forks when opened up where the critical procedures and will... Whenever you change your oil forks apart before when i first got my,...

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