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thkbaron
Guest
So when I hit descent bumps my forks knock. Why is this? I rebuild them to spec with new progressive springs. Any Ideas!?! Thanks.
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SVSooke
Guest
My first thought was loose steering head bearings.
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thkbaron
Guest
I will check all those things. I may not have gotten all the air out when I rebuilt them too. That's a possibility. I'll check them out this winter after riding season. I should probably replace the stem bearings anyways.
Steve
GS Whisperer
There is no need to "get all the air out", as in applying a vacuum to the forks. You simply don't need to add any additional air when using proper springs. However, you DO need to make sure they are preloaded enough to limit your "sag" to 20-25% of available travel. In the case of most GS forks, that will be about 1 inch of sag.
If the noise happens to be loose steering bearings, your "riding season" might be shorter than you think. Besides being a source of noise, loose steering bearings can do some really strange things to the handling of a bike. Hope you don't crash.
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If the noise happens to be loose steering bearings, your "riding season" might be shorter than you think. Besides being a source of noise, loose steering bearings can do some really strange things to the handling of a bike. Hope you don't crash.
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Sure its the forks and not something else rattling and your thinking you hear the forks?? Take some tape and put it across the back of the gauges and anything else that may be subject to rattling and take it for a ride on a good bumpy street and see what it sounds like then.
Because we are moving and wind plays a role in things, we often hear something and its not from where we "think" we are hearing it from.
Because we are moving and wind plays a role in things, we often hear something and its not from where we "think" we are hearing it from.
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Guest
Guest
I read somewhere, progressive front springs can knock due to the "progressivness of the spring" Though I would heed some of the other advice here and look at some other things as well, steering head bearings, wheel bearings (had a bad on one my bike once that would knock when I hit a bump), the internal slider bushings in the front. Also check the brake mounts and make sure one of them hasn't come loose. Just FYI, alot of us on this forum use straight rate fork springs from Sonicsprings.com. Check them out.
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thkbaron
Guest
Well I'll revive this one. Been a while but I just re did my forks. I lengthened the spacer on top of the spring a bit and the problem has mainly gone away.....if I hit some really nasty bumps it will still knock but it's better than it was.
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gs45082
Guest
I had a momentary panic when I noticed a severe clunk when coming to a hard stop. Turned out it was my speedo rocking in the mount, rubbers were AWOL.
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JamesWhut?
Guest
If its coming while you're under braking, you are probably bottoming out the forks hard, and then the sound is either just the spring and slider "crashing" or as mentioned something else in the front end or somewhere moving and making the noise.
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thkbaron
Guest
So I rebuild my forks today. New 15 w fork oil and I found out the put the progressive springs upside down and may have had the incorrect amount of oil in so ill let you know when I get to drive it again.
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Guest
Guest
Just saw this thread and had to go back and look at the posting dates. You sure take your time fixing things. lol
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thkbaron
Guest
It was an annoyance not a necessity. The seals finally started leaking so I took the opportunity to do the rest and investigate a bit.
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Guest
Guest
What!!? Ed...
Crazy, huh?
It's so easy to procrastinate...but then again, I'm also busy doing "honey-do list" around the house. Okay, okay...I know I can only use that excuse for so long...
Here's my projected plan:
1. Move the Axle below the springs on my collapse-able trailer (So it's easier to load the bike)
2. I need to load the bike to get it to the Bike Shop for welding job on the seat frame area (I don't want to do this w/forks removed)
3. Then I can proceed w/forks; including getting new fork springs (Progressive or Sonic as Steve explained in post#9 here)
http://www.thegsresources.com/_forum/showthread.php?246401-Fork-Seals&p=2390956#post2390956
Ed
G
Guest
Guest
1. NO, axle is moved to the top of the springs, it is already under the springs. Take the fenders off first, you'll have to remount them one you redo the axle.
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thkbaron
Guest
ok so I solved this problem randomly today..........yes it's been a while since I've posted.....it wasn't the forks at all. It was my damn gas cap! This has been annoying me for years!
