Rear Shock & Front Fork Info Requested
Posted February 06, 2006 - 08:09 PM
Second question, I want to change the fork oil in my bike and was wondering if there is a specific fork oil weight other then stock along with the fill amount that may help my front forks work better then the factory setting. My bike is a 99 WR400 and I weigh 200 lbs. ready to ride. I have read in the forum that my front forks are a bit harsh threw the center of the stroke and wanted to see what I could do to approve on this. Race Tech shows the front fork springs are set up for a 200lb rider so I should be good there.
Posted February 06, 2006 - 09:47 PM
the lighter the weight, the plusher it will be. People use a heavier weight fluid to compensate for soft valving. People are happy doing so, nothing wrong with it, but the benefits of a revalve are huge.
Your bike is getting on a bit, the shock could probably do with an oil change and a re-gas. It has probably never been done before.
All depends on how long you want to keep the bike and how much you want to spend on it. Just servicing the forks and shock will see a big improvement, but getting it revalved and serviced professionally is obviously the best option.
Don't forget you can mix suspension fluid weights so if 5wt too soft or thin, drop the level a bit and add some 15wt.
Posted February 06, 2006 - 10:30 PM
Posted February 07, 2006 - 11:05 PM
Is the outcome the same for each option? Maybe a link to a website may help me to understand the differences.
thanks in advance,
110kgs (242 lbs) with all riding gear and loaded camelbak.
Posted February 07, 2006 - 11:39 PM
heavier weight oil will slow down dampening, which is fluid moving passed the shims. Like honey compared to water.
More or less oil effects the stroke length. More oil will cause the suspension to hydrolock earlier. Not to sure about this one.
Springs just hold the bike up. With stiffer springs, you can have very plush suspension (use light weight oil).
Posted February 08, 2006 - 05:09 AM
Front and rear pring rates are critical for maintaining proper ride height and stability during off road riding. It is important to have sag set to approx 1/3 of the overall travel so that the suspension can work as designed. The springs have no dampening effect. That is why we run oil in the front and rear shocks to make sure we either dont pogo or compact. Valves control the oil flow on a high speed and low speed impact or compression as well as on the return or extension.
Some day it will all be electronic controlled dampening with a micro chip and multiple overlaping dampening circuits. For now we got a few things to adjust. Anyone over 180 lbs with gear should not be riding stock suspension.