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Spongy Front Suspension

Started by Worm, May 12, 2010, 06:59:17 PM

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Worm

My front end seems a bit spongy. I don't know what kind of travel I'm supposed to get but it seems to much to me. This from a guy who hadn't ridden a bike until two weeks ago. If I put my weight on the handlebars with the front brake held, it seems like the suspension bottoms out. It's kind of hard to tell sitting on the bike though. Is this normal or is there something I should check out?

Thanks
2005 Suzuki GS500F
K&N Lunchbox
20/65/142.5 jetting
Fenderectomy
Flush Mount Front Signals

jeremy_nash

the gs tends to be sprung light, if your a big guy, that will make it worse.  a set of springs for your weight, and some slightly heavier fork oil will take care of you
gsxr shock
katana FE
99 katana front rim swap
vapor gauge cluster
14 tooth sprocket
95 on an 89 frame
lunchbox
V&H ssr2 muffler
jetted carbs
150-70-17 pilot road rear
120-70-17 sportmax front
sv650 rear wheel
sv650 tail swap
gsxr pegs
GP shift

DoD#i

Unless you are incredibly lightweight, if the front springs are stock, it's a pretty soft stock suspension. Not to say there could not be actual problems making it worse (fork oil leaks, etc). If it's not clunking when you hit bumps, you don't need to freak out about it. If it's so stiff it doesn't move, it doesn't do much good, either.
1990 GS500EL - with moderately-ugly paintjob.
1982 XJ650LJ -  off the road for slow repairs
AGATT - All Gear All The Time
"Ride a motorcycle.  Save Gas, Oil, Rubber, Steel, Aluminum, Parking Spaces, The Environment, and Money.  Plus, you get to wear all the leather you want!"
(from DoD#296)

Worm

Are the springs inside the fork tubes? Cause there aren't any on the outside.
2005 Suzuki GS500F
K&N Lunchbox
20/65/142.5 jetting
Fenderectomy
Flush Mount Front Signals

jrains89

haha yea the springs are in the forks, the springs create the force that keeps them from collapsing. replacing the fork oil in the forks with 20 weight helps alot. there are good writeups on how to do this on the board. read up
2004 GS500F

the mole

How heavy are you, and how old is the bike?
Might be that if its had a bit of use and never had the fork oil changed, that's all it needs. See how it reacts over bumps, if it bottoms a lot there's a problem, if not it could be as good as the standard forks can be! You'll get a lot of fork dive with heavy braking on a standard set-up, but if you make them too stiff they won't be supple enough to keep the wheel on the ground.

Worm

I'm about 240 and the bike is a 2005. I don't have any history of service for it. I do know the previous owner did no maintenance. So it is possible that new fork oil would do the trick but I was thinking that being a bigger guy, stiffer suspension may be helpful. It did bottom out on a rough bump today. It felt like the tire was low, but I stopped and checked the pressure right after and it was fine.
2005 Suzuki GS500F
K&N Lunchbox
20/65/142.5 jetting
Fenderectomy
Flush Mount Front Signals

the mole

You could probably use heavier springs, lots of info on this site. Good idea to change the fork oil (maybe one grade heavier?) while you think about it.

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