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Fork oil

  • Thread starter Thread starter Matchless
  • Start date Start date
Suzuki_Don said:
Don't mean to hijack here Andre. But a question still on forks. I have just received my 650 forks to go on the GS550B and they have the capability for air pressure in the top caps. As I have never before had a bike with air in the front forks can I receive some advice on how much pressure to run with and any procedures to end up at the correct pressure and how this system actually assists the normal oil damped forks.

BTW that software you put me onto works brilliantly. Thanks for sharing.
Click to expand...
Don,
Sent you a PM. The owners and workshop manual for the GS850's and 1000's have a very brief coverage on the air for the fork. That adjustment seems to be only intended for the final fine tuning of your front suspension. I understand that as little air pressure as possible and rather having the oil closer to the dampening effect you prefer is more desirable. (This may be what Brian was suggesting).
My bike was still holding pressure on the 28 year old seals and I had last checked it a year ago!
 
i used 15w fork oil recently, as per what seems to be the most popular oil weight used on this forum
but i think i'll try using 20w next time, may suit my riding style better :-k
so, andre, consider using 20w for a start
if you find it too thick on a road-test, you can drain a little and add the same quantity of the atf
 
psyguy said:
i used 15w fork oil recently, as per what seems to be the most popular oil weight used on this forum
but i think i'll try using 20w next time, may suit my riding style better :-k
so, andre, consider using 20w for a start
if you find it too thick on a road-test, you can drain a little and add the same quantity of the atf
Click to expand...

I am definitely going to play with the 20W and making it softer with ATF. The 20W is readily available here in 500ml cans so I will get a couple and some ATF for the shelf in the meantime. I have just 30 miuntes ago put in 20W and ATF 50% mix for starters. Once the bike is on the road again and I do the suspension setting up, I can see which way to go with the damping.
Very interesting that you find 20W may work better for you. I am only 95 Kilograms, about 210 lb and think this has an effect as well.
Thanks for the info.
 
hm, i'm like 75 kg, but prefer a stiffer suspension setting - cos when i set the suspension all nice for everday city use, it can feel quite wobly at higher speeds - and i dont like that
 
psyguy said:
hm, i'm like 75 kg, but prefer a stiffer suspension setting - cos when i set the suspension all nice for everday city use, it can feel quite wobly at higher speeds - and i dont like that
Click to expand...

If you change to 20W let me know how you find it. I will probably take quite a while before I get to that real fine tuning stage. How is your average climate around there, temperature wise?
 
Matchless said:
If you change to 20W let me know how you find it. I will probably take quite a while before I get to that real fine tuning stage. How is your average climate around there, temperature wise?
Click to expand...
day temps:
winter - 10-16'C
summer - 20-28'C
 
psyguy said:
day temps:
winter - 10-16'C
summer - 20-28'C
Click to expand...


Basically we have the same here, so we are not running at extra cold temps, so your tests and mine should relate a bit except weight wise.
I thought engine oil was a can of worms when threads on that were started, but fork oil is not far from it it seems. What I have learned though is that we should change our fork oil more regularly.
Keep well.
 
fork oil

fork oil

I just bite the bullet and use belray 30w fork oil in my GS, seems to work great, keeps the front end from excessively diving and maintains a good ride and the seals great. I get my from Dennis Kirk, since most dealers dont carry that heavy of a fork oil.
 
MrBill54 said:
I just bite the bullet and use belray 30w fork oil in my GS, seems to work great, keeps the front end from excessively diving and maintains a good ride and the seals great.
Click to expand...

do you have the experience with any other oil weight on the same bike?
i'd be interested to hear what kind of difference it makes
thanks
 
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