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Discussion Starter #1
Has anyone just fitted softer springs without revalving, does it improve things or just a waste of time?
 

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Discussion Starter #2
Sorry Admin I should have posted this in suspension section could you move it please :smile:
 

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Are you really that light that you need softer springs in the front? What's your goal with the suspension?
 

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Discussion Starter #4
I no longer race and doubt I'll do anymore track days, I do ride quick and enjoy pushing it when road and conditions allow so I'm after a fast road setup not track, where you tend not to find bums/ruts/over banding and pot holes not to mention just poor surfaces.

At 85kg I'm not light or heavy Mr average I'd say, I've got quite a bit of experience setting up bikes so I like to think I know what I'm doing and it didn't take me long to realise that the front is all wrong. Way too stiff, very over damped, a very small adjustment range for compression that ranges from stiff to stiffer, rebound is ok but can't really be set as the mismatch of damping/spring is too much.

I've now got preload fully soft, damping 17 clicks out (even though the manual states usable range is 0 - 13), rebound 5 clicks out, its better but not right still kicking off small bumps and not inspiring confidence when pushed but there's no more adjustment left. So I'm thinking perhaps the way forward is to change the front springs standard they are 1.0N or that as far as I've managed to find out, 0.95N would suit me better hence the question.
 

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I no longer race and doubt I'll do anymore track days, I do ride quick and enjoy pushing it when road and conditions allow so I'm after a fast road setup not track, where you tend not to find bums/ruts/over banding and pot holes not to mention just poor surfaces.

At 85kg I'm not light or heavy Mr average I'd say, I've got quite a bit of experience setting up bikes so I like to think I know what I'm doing and it didn't take me long to realise that the front is all wrong. Way too stiff, very over damped, a very small adjustment range for compression that ranges from stiff to stiffer, rebound is ok but can't really be set as the mismatch of damping/spring is too much.

I've now got preload fully soft, damping 17 clicks out (even though the manual states usable range is 0 - 13), rebound 5 clicks out, its better but not right still kicking off small bumps and not inspiring confidence when pushed but there's no more adjustment left. So I'm thinking perhaps the way forward is to change the front springs standard they are 1.0N or that as far as I've managed to find out, 0.95N would suit me better hence the question.
Ummmm....yeah. Gotcha on that. The initial post didn't mention any of that. :wink:

Most people around here find the spring rate pretty decent as they are much heavier than the rear spring is setup. Not sure why Kawi springs the front so heavy and leaves the rear so soft, but that's the way it is.

If you've already determined that the 1.0kg stock springs don't meet your needs, I'd venture a guess that you'll need to revalve it as well. The lighter spring rate will allow the forks to move easier, but the same amount of fluid will be moving through the orifices in the cartridge. The fluid movement (restriction) is what will determine the overall rate at which the forks work. If you're ultimately looking for a softer, more compliant ride, I'd be looking to get the new springs with matching valves. Springs alone won't change much unless you can control the fluid rates better than OEM.

But I'm not an expert in real life. I just play one on the internet.
 

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Discussion Starter #6
Yes I take your points and your correct. What isn't easy to judge with compression damping is at what point the spring is controlling things and overriding the damping, unlike rebound where you can physically see the return speed change as you adjust.

What I'm thinking is that the spring could well be stopping the damping working once beyond a certain point, if it is then a softer spring will allow it to work and would also help with the stiffness hopefully to a point were it will suit me.

So was wondering if someone had already tried this route.
 

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My initial thought, for g4, is that the fork setting is somewhat on the soft side. Next thought is that you're running like 50 pounds in the front tire. And my final is that you have a death grip on the grips.
 

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Yes I take your points and your correct. What isn't easy to judge with compression damping is at what point the spring is controlling things and overriding the damping, unlike rebound where you can physically see the return speed change as you adjust.

What I'm thinking is that the spring could well be stopping the damping working once beyond a certain point, if it is then a softer spring will allow it to work and would also help with the stiffness hopefully to a point were it will suit me.

So was wondering if someone had already tried this route.
I just installed .95 springs from racetech... I had them and I needed new fork seals, so what the hell...had them installed. I weigh 170 lbs

I'm an agressive street rider... Improvement was there but by a small amount. (I was not to unhappy with oem springs either) I have 5 1/4 lines showing on the tripple and rebound and dampening 3 clicks up from full soft. I also have front sag at 35mm rear same 35mm

Bike is smoother over bumps for sure and leaned over I can hit ripples and still feel confident...

The bike has never felt this good!

I LOVE THE SET UP!!!!

I can ride as fast as I dare... I 100% confidence in the bike and tires...

Just rode with a my buddy who has an 04 636 and he said I was ripping the corners...

Now if I can just find a place to do my annual 189 run to make sure everything is good we can move on with the ridding season:cool:

179 is my best for the season so far...
 

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Discussion Starter #9
Vr6 thanks for this this is confirming the issue is in the damping and not so much the springs, its looking more and more a revalve is the only answer.
 

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forks

Plus one of what vr6 said. I'm 98kilos in gear changed the front springs to 1.1 and gold valves from Race Tech. The revalving made the forks work more progressively giving much better feed back. So it really is the valving that makes the difference. My bike is track only.
 

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Are you really that light that you need softer springs in the front? What's your goal with the suspension?
Lol, Sky, some of us are indeed that light. Maybe 160-165 with full gear.

On both, the Gen3 and Gen4, I pretty much had/have the forks full soft and only had/have 30mm sag. I'd have to get softer springs to get more. The rear wasn't/isn't an issue...
 

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HI my opinion here is actually I have Tein Basic coilovers on my car (only height adjustable), 450f/450r spring rates. The relatively soft rear springs are allowing a lot of rubbing in the rear of my car, so I was planning on buying stiffer springs all around. My plan was 500f/600r.

My question is, am I asking for a bad ride and/or shock failure by bumping the rates up that high with the off the shelf Tein dampers?
I'm not sure these ZX10R guys are going to answer that for you. Is this spam? :dontknow:
 

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At 150lbs I changed out the front springs to 0.9N and run with nil preload (8 rings showing) and rebound all the way out. Compression is set at 12 clicks out. The oem oil level was also too high on my bike and I switched to a 110mm air gap with 5wt oil. This gives me 28mm free + 10mm rider sag and works well on my gen 3. I had to uprate the rear for 25mm rider sag :smile:
 

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just leave frontspring in there and replace rear spring with correct rate as the rear is the one supporting the majority of massonce you fix the rear the front will make a lot more sense to you you won't fly over bumps anymore I rebuilt rear shockand now everything is spot on
 
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