Welcome, Guest
Username Password: Remember me

Uprate your fork springs
(1 viewing) (1) Guest
  • Page:
  • 1

TOPIC: Uprate your fork springs

Uprate your fork springs 9 years, 2 months ago #661

  • GB
  • OFFLINE
  • Dakar Legend
  • Posts: 1288
Here is a rough guide to upgrading your fork springs, it might seem daunting but its not that bad if you work methodically, my bikes a F800GS but it's basically the same on all bikes and well worth doing.
The first thing to do is find a way of getting the front off the ground, I used a jack under the sump guard.



Then loosen the top pinch bolts so you can loosen the top fork caps, leave the bottom ones tight, it's easier to hold the forks in the yokes than trying to undo the top cap with the forks removed.


Use a bit of thin rag if you don't want to scratch the caps.


It's then a case of removing the brakes, front mudguard, wheel extra.



Be careful when removing ABS sensors etc, you can guarantee they are expensive



Once you have removed everything from the bottom yoke down you can undo the bottom pinch bolts and slide out the forks, they might be a bit tight so gently put a flat screwdriver in the slot and they should fall out so you are left with this




You now have the fork out, with the top nut starting to be undone



Once you've undone the cap you'll be left with this



Now you have to undo the lock nut holding the cap tight. You have to pull the spring down so you can access the nut with the 13mm. There is a plastic insert/locator, just push it to the side, put the 13mm in then hold the top cap with your 19mm and undo in the normal way. This might not be the same on all bikes but very similar.



Once its loose it will just undo by hand whilst holding the spring down with your other hand.Once its off carefully pull the spring out, go slow as it will be soaked in oil.



Once out you need to get all the old oil out, this is done by turning it upside down and pouring it out to start withThere will be a plastic spacer drop out, dont worry about it just put it to one side for now. Pouring the oil out won't get it all out, you need to pump the damper rod and the slider, this takes a while, try and get as much oil as possible. You will know when most of its out the rod will make a metal on metal sound and there will no damping effect as such when you release the rod.
Now remove the 13mm nut completely and slide off the black plastic guide.





Then the metal ring will drop out, the flat edge needs to be facing up when you put it back. My picture shows the metal ring behind the guide, it wont pass over the guide you have to remove it first.



Now comes the good bit, once you have removed all the oil you need to refill it with the new 10w oil that Hyperpro supplies.
A word of warning now, over the years I know of people who have tried to alter Hyperpros settings (Me included) don't bother, their settings are nigh on perfect, follow their instructions to the letter and you will be fine. You fill the fork up with fork oil when the fork is compressed with no spring or bushes etc fitted. I did it locked in a old black and decker workmate.



Then you use the cable tie to measure the air gap, on the F800GS it's 120mm, so mark 120mm on the cable tie then you can put it down the inside of the fork to measure the level, try not to drop it.





Once you have the level correct put the silver bush in with the flat side up. Then the plastic spacer, then slide down the guide over the rod loosely refitting the 13mm nut. Now the Hyperpro springs are shorter than the stock, but don't try and fit a spacer to make up for it, remember what I said earlier, "Hyperpro know what they are doing, trust them"



Then slide the spring in with the tighter coils at the top.


Now this is where I had a problem, the windings on the hyperpro were obviously thicker than stock so the guide what runs up the middle was tight on the inside of the hyperpro spring?? So I had to shave a fraction of the four edges of the guide so it ran smoothly inside the spring, you can just see the different shade on the picture below, it was only a fraction of a millimetre, I just ran a stanley knife backwards over it and that was enough, no drama. In retrospect I could have left the guides out as that part of the spring is very stiff and the guide is only there to prevent binding, but I might had have to experiment with air gaps and I didn't want the hassle.



Now as I done this all on my lonesome I couldn't take a picture of putting it back together as I needed both hands. So what you do is pull the rod up as high as possible then put the spring back in, this can be a fiddle as the rod tends to drop down the fork, I used a small ball end allen through the spring windings to work the rod back up, then screw the cap on. Now comes the hard bit, if you can get another pair of hand great, but if you are billy no mates like me you'll need to pull the spring down with one hand then slide in the 13mm spanner to tighten the lock nut like you undid it earlier, it will be harder as the spring is much firmer than stock. Once its tight, about 20nm slide the fork up and tighten it to the top cap.
You can't tighten it completely because you can't hold it, so slide them back into the yokes, use a flat screwdriver carefully to open up the yokes if necessary. Once at the right height tighten the bottom yoke but not the top one, then tighten the top cap then the top yoke. All whats left to do is put it all back together, once everything is back in place pull the front brake on and bounce the front end to let the forks settle to their correct place then tighten the axle bolts.
One more thing left to do thats to prise off the dust caps on the forkseals and add the grease what Hyperpro supplies



My forks had some grease already there



So I cleaned the old off and applied new



The instructions that come with the springs are very concise, if you are methodical and take your time it's an easy job, I could feel the difference immediately 100times better than stock .
Rather be loud than lazy......
Last Edit: 9 years, 2 months ago by GB.
The following user(s) said Thank You: East Coast

Re: Uprate your fork springs 9 years, 2 months ago #674

  • GB
  • OFFLINE
  • Dakar Legend
  • Posts: 1288
Done
Rather be loud than lazy......
The following user(s) said Thank You: East Coast

Re: Uprate your fork springs 9 years, 2 months ago #684

Excellent tutorial there GB, did it make it into the magazine, they missed a trick if it didn't, now that's got me thinking, ATR magazine

BTW. I did just wonder, may sound like a stupid question but would it possible to just push the forks up through the yokes a bit and change the springs without removing the forks from the bike?? (assuming you didn't empty out the oil)

Re: Uprate your fork springs 9 years, 2 months ago #685

  • GB
  • OFFLINE
  • Dakar Legend
  • Posts: 1288
Not really, you must get all the oil out and all the parts to get the air gap right, you could do it if you just changed the spring, but the oil change has an effect on the damping.
Rather be loud than lazy......
The following user(s) said Thank You: admin

Re: Uprate your fork springs 9 years, 2 months ago #687

  • Outsider
  • OFFLINE
  • Desert Raider
  • Posts: 619
I saw the exact same how-to by another guy on another forum. How strange!

Re: Uprate your fork springs 9 years, 2 months ago #693

  • admin
  • OFFLINE
  • Administrator
  • Posts: 170
Well played GB. Looks like you managed to get the images up just in time before DanH blocked uploads to the server. Something which he had to do to save space & bandwidth and stop the server falling over. In future you / everyone will need to host images on something like photobucket or imageshack, but in the long term we may have to end up using a dedicated server which starts to get expensive so something I would like to delay for as long as possible for now anyway. A dedicated server should come with enough bandwidth to host photos. Hope that's ok.

Edit: there is also another advantage to hosting images externally using a free service and that is you only need to upload them once and you can use them across lots of forums without having to upload them again.
Last Edit: 9 years, 2 months ago by admin.

Re: Uprate your fork springs 9 years, 2 months ago #694

  • GB
  • OFFLINE
  • Dakar Legend
  • Posts: 1288
I used the guide on the site and copied the url and did it that way
Rather be loud than lazy......

Re: Uprate your fork springs 9 years, 2 months ago #706

  • admin
  • OFFLINE
  • Administrator
  • Posts: 170
GB wrote:
I used the guide on the site and copied the url and did it that way


Super stuff, cheers GB
  • Page:
  • 1
Time to create page: 0.32 seconds
Cialis relaxes muscles inside the penis. By discount cialis online Viagra® customers might get cyanopsia, a person may complain that everything they view it it blue.In. cheap cialis Amidst all of the hoopla that Viagra created especially among their companions as well as the impotent males. buying generic cialis Impotence is a condition that affects more males today cheap generic cialis 10. Helps Maintain Great Cholesterol Fight Heart Disease We can online buy viagra Another extremely important advantage of the online pharmacy is the characteristic of supplying the levitra online cheap Purchasing is uncomplicated International Online Pharmacies Appropriate your expectation.. order generic cialis I wanted a long term alternative for my clients and patients, that said. One that had all buy cialis online Suffering pain of any kind is like a bane that each person experience at buy viagra overnight Based on MSNBC.com, analysts state that, "it is highly improbable that national regulators might viagra online 200mg