If you do not know how to clean fork seals, you may be neglecting one of the most important parts of your dirt bike. Forks connect the mainframe of a dirt bike to the front wheel and the axle and are critical to the safety and the function of any bike. 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. All Rights Reserved. Once upon a time we changed fork oil on the first service for a new bike, street as well as dirt. 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. Your IP: 123.30.50.74 Clean is because you want to measure the oil that's taken out. Maybe you just had them serviced. You'll want the wheel removed at this point and depending on bike model the handlebars, too. 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. You can add fork oil through the air bleeder with a small syringe. If ignored, the oil will drain out of the fork, severely affecting its performance, which can also make the bike unsafe to ride. 5 years is avarage on my dirt bikes or 50,000 miles on a street bike . Check out if the fork has an oil draining outlet. Remember, always refer to the manufacturer's recommendation. Fork seals can fail, but there are many other possible reasons for leaky fork seals. To remove oil, you will need to remove the fork legs from the bike and turn them upside down to drain oil out of … Since it is easy to change fork oil, I recommend you start with 10 wt along with the heavier springs. Motorcycle fork oil isn’t a lot different than other kinds of oils. Once off, remove the inner cartridge and use a fork compression valve removal tool to remove the compression valve. If it's too difficult use a vice clamp to loosen the cap after removing the fork from the bike. 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. Since them only Jeremy has been inside them. Yamaha sells the Motion Pro seal driver and fork-cap-ring nut wrench required for a quick seal change. Today, the oil that comes in modern bikes and is used by most reputable suspension shops is very high quality and, to the surprise of many, is usually the last thing that … 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. Ok. Bushing replacement is a snap, they just pop in and out of their fixed slot. And if possible do not get the piston of the fork out. 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. 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. 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. The right tools are the key. Touch device users, explore by touch. Begin typing to search, when autocomplete results are available use up and down arrows to review and enter to select. Now you've got a mess and a job ahead. How do you measure the correct amount of suspension oil? Please enable Cookies and reload the page. If it’s leaking you will see fork oil on the outside of the tube. 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. Without proper care, you may shorten the effective lifespan of your bike’s fork … Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. 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. Start by putting your bike on a dirt bike stand, so that the wheels are off the ground, fully topping out the suspension. Dirt bikers are another story. Pull one of the fork legs out of the triple clamp and place a snug fitting o-ring on the slider. 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. Hopefully you already bought the replacement parts otherwise ride day can wait. If the seals leak then you have to disassemble the forks to get at the inner cartridge. After all, dust and dirt can wreak havoc on your bike’s fork seals. Button everything up and put in a couple of hot laps noting how the bike … 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. I'm guessing the cleaning agents in the ATF are what makes it stay clean and not get contaminated like factory fork oil . Dang, no dipstick. I've had my forks apart before when I first got my bike, changed the oil and springs. (6.9 oz) If you completely dis-assemble them then re-build with 275 c.c. Copyright 2004-2021 MotoSport, LLC. 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 … Causes of leaking fork seals. Once you have done it, you have to refill the fork with … Your dirt bike … Tighten a fork tube in place using the pinch bolts. Why you should change your fork oil. 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 … Tip the fork upside down to drain the oil. Needless to say, following the manufacturer's recommended intervals helps reduce a lot of headaches especially when changing the fork oil. Turn those compression and rebound clickers all you want but if you haven't changed the suspension oil in some time you won't get any more fine tuning out of the forks … Remove fork guard clamps, if necessary, and loosen the pinch bolts on the triple clamps. All sorts of random matter may have collected in/on them as they sat around before becoming one unit. Forks Leaking Oil? Cloudflare Ray ID: 617c37525c9c0bd6 Leaking forks is another frustrating problem. Exact shipping costs are determined upon checkout. Less oil will have the opposite effect. Step 2: Clamp the Seal doctor onto the Fork. This is full of oil so be careful! 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. They take fork oil maintenance seriously because they know the difference that it can make in the performance of their bikes. You can also use a ratio rite cup, filled with the manufacturer's recommended amount and then pour into the tube. I'm a fanatic about bike … All it takes is some dirt packed into the seal or a small nick in the fork tube for a leak to start. Learn how to change fork oil, how to replace fork … Step 1: Remove the Dust l seal from the dirt bike. Firstly, you will need to remove the fork from the bike. But fork seals are some of the most neglected parts of a dirt bike… Start your dirt bike and let idle for 3 minutes Turn off and stand bike up, making sure it is level Remove the fill cap (dipstick) Place an oil pan under the engine On some forks, it is possible to adjust the oil height with the fork still on the bike … If there is, you are in luck but if not, then you have to go through the troubles of opening up the entire piston … • Turn the forks upside down and place a graduated cup (the syringe with the plunger removed works … • This video shows and explains the internal design of 3 stage pnuematic spring (PSF) single function (SFF) forks. Street as well as dirt typing to search, when autocomplete results are available use up down! ( 6.9 oz ) if you completely dis-assemble them then re-build with 275.. Bike fork seal must be one of your top priorities of fork oil isn ’ t a of. As dirt makes this chore quite a bit easier ) and replace fork. 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